Free Online Tools
289 tools available · no sign-up · no ads
⚡ Generators
CPF Generator
Generate mathematically valid Brazilian CPF numbers for software testing and development. With or without formatting. For test use only.
QR Code Generator
Generate QR Codes from any text, URL, email or phone number. Instant PNG download, processed directly in your browser.
CNPJ Generator
Generate mathematically valid Brazilian CNPJ numbers for software testing. With or without formatting. For test use only.
PIS/PASEP Generator
Generate mathematically valid Brazilian PIS/PASEP numbers for software testing. Follows the official check-digit algorithm. For test use only.
RENAVAM Generator
Generate mathematically valid Brazilian RENAVAM vehicle registration numbers for automotive software testing. Correct check digit. For test use only.
Brazilian Voter ID Generator
Generate mathematically valid Brazilian voter ID (Título de Eleitor) numbers for software testing. Follows the TSE official algorithm. For test use only.
CNH Generator
Generate mathematically valid Brazilian driver's license (CNH) numbers for testing. Follows the DETRAN algorithm. For test use only.
Credit Card Number Generator
Generate valid credit card numbers using the Luhn algorithm for e-commerce and payment testing. Supports Visa, MasterCard and Elo. For test use only.
CEP Generator
Generate Brazilian postal codes (CEP) by state for software testing. Numbers within the real postal code ranges per UF. For test use only.
RG Generator
Generate mathematically valid Brazilian RG (identity) numbers in the São Paulo format for software testing. For test use only.
Brazilian Certificate Number Generator
Generate valid Brazilian birth, marriage or death certificate numbers for software testing. Standard 32-digit CNJ format. For test use only.
Brazilian Bank Account Generator
Generate fictitious Brazilian bank account data (bank, branch, account number and check digit) for software testing.
Random Number Generator
Generate random numbers between a defined minimum and maximum. Option for unique numbers (no repetition) and configurable quantity.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text for prototypes and layouts. Choose between paragraphs, sentences or words.
Brazilian License Plate Generator
Generate Brazilian vehicle license plates in the old format (AAA-0000) or Mercosul format (AAA-0A00). Random letters and numbers.
Username Generator
Generate creative nicknames for games, social networks and chats. Random combinations of adjectives and nouns.
Name Generator
Generate random Brazilian names (male, female or both) for software testing and database population.
Company Data Generator
Generate fictitious company data (company name, CNPJ and type) for software testing. Mathematically valid CNPJ.
Person Data Generator
Generate complete fictitious person profiles: name, CPF, date of birth, CEP and phone number. Mathematically valid data for testing.
Brazilian State Tax ID Generator
Generate valid Brazilian State Tax IDs (Inscrição Estadual) for SP, RJ, MG, RS, PR and BA. For fiscal software and SEFAZ integration testing.
Vehicle Data Generator
Generate complete fictitious vehicle data: make, model, year, color, license plate and valid RENAVAM. For automotive software and fleet system testing.
Placeholder Image Generator
Generate placeholder image URLs with custom dimensions and colors for use in prototypes and layouts. Compatible with placehold.co.
UUID Generator
Generate random UUID v4 identifiers with one click. Copy individually or in bulk. Processed in the browser, no data sent to servers.
Mega-Sena Number Generator
Generate random number combinations for the Brazilian Mega-Sena lottery with 6 to 15 unique numbers between 1 and 60.
Token / API Key Generator
Generate cryptographically secure random tokens: hexadecimal, alphanumeric, Base58 or UUID. Ideal for API keys, secrets and session tokens.
PIN Generator
Generate random PINs (Personal Identification Numbers) with configurable length from 4 to 16 digits.
Barcode Generator
Generate barcodes in CODE128, EAN-13, EAN-8, CODE39 and UPC formats. Export as PNG. Processed entirely in your browser.
Color Scheme Generator
Generate harmonic color palettes from a base color: complementary, analogous, triadic, tetradic and split-complementary. Copy HEX codes with one click.
✅ Validators
CPF Validator
Validate Brazilian CPF numbers instantly using the official algorithm. Useful for testing document validation in applications. No data sent to servers.
CNPJ Validator
Validate Brazilian CNPJ numbers instantly using the official algorithm. Useful for testing fiscal document validation. No data sent to servers.
PIS/PASEP Validator
Validate Brazilian PIS/PASEP numbers using the official check-digit algorithm. No data sent to servers. Free and no sign-up.
RENAVAM Validator
Validate Brazilian RENAVAM vehicle registration numbers using the official DENATRAN algorithm. No data sent to servers.
Brazilian Voter ID Validator
Validate Brazilian voter ID (Título de Eleitor) numbers using the official TSE algorithm. No data sent to servers.
CNH Validator
Validate Brazilian driver's license (CNH) numbers using the official DETRAN algorithm. No data sent to servers.
Credit Card Validator
Validate credit card numbers using the Luhn algorithm. Identifies the card brand and verifies the check digit, no data sent to servers.
RG Validator
Validate Brazilian RG numbers in the SP format (9 digits + check digit). Browser-side verification, no data sent to servers.
Brazilian Certificate Number Validator
Validate Brazilian birth, marriage or death certificate numbers in the 32-digit CNJ format. Browser-side verification.
Brazilian State Tax ID Validator
Validate Brazilian State Tax IDs (Inscrição Estadual) for SP, RJ, MG, RS, PR and BA. Browser-side verification.
Brazilian Bank Account Validator
Validate Brazilian bank account numbers by check digit for major banks (Bradesco, Itaú, Banco do Brasil, Santander and Caixa). Browser-side verification.
Email Validator
Check if an email address is valid. Analyzes structure, domain and local part. Processed in the browser, no data sent to any server.
URL Validator
Check if a URL is valid and analyze its parts: protocol, domain, path, parameters and hash. Processed in the browser.
🔄 Converters
Base64 Converter
Encode text to Base64 or decode Base64 strings back to the original. Free online tool with no server required.
URL Encode / Decode
Encode text for safe use in URLs (percent-encoding) or decode URL-encoded strings back to the original. Processed in the browser.
Binary Code Translator
Convert text to binary code (0s and 1s) and vice versa. Supports any ASCII character. Processed in the browser.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds. Shows local time and UTC.
Morse Code Converter
Convert text to Morse code and vice versa. Supports letters, numbers and punctuation. Instant result in the browser.
Number Base Converter
Convert numbers between binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16). Instant bidirectional conversion.
Measurements Converter
Convert between units of length, mass, temperature, area, volume and speed. Instant result in the browser.
Caesar Cipher
Encode and decode messages with the Caesar Cipher. Choose the shift (1–25) and convert text instantly in the browser.
Color Converter
Convert colors between HEX, RGB, HSL and CMYK instantly. Enter any format and get equivalents in the others. Live color preview.
Byte Size Converter
Convert file sizes between bits, bytes, KB, MB, GB, TB and PB. Supports SI (decimal) and IEC (binary) scales. Instant result.
Angle Converter
Convert angles between degrees (°), radians (rad), gradians (grad) and turns. Instant result in the browser.
Date Format Converter
Convert dates between the most common formats: dd/mm/yyyy, yyyy-mm-dd, mm/dd/yyyy, ISO 8601 and Unix timestamp.
Text ↔ Hex Converter
Convert ASCII text to hexadecimal values and vice versa, character by character. Useful for debugging, encoding and protocol analysis.
Text ↔ Decimal Converter
Convert ASCII text to decimal codes and vice versa. Each character is represented by its decimal value in the ASCII table.
Numeric Bases Converter
Convert numbers between binary (base 2), decimal (base 10), hexadecimal (base 16) and octal (base 8). Type in any field for instant conversion in the others.
XML to JSON
Convert XML data to JSON format quickly and easily.
JSON to XML
Convert JSON data to XML format quickly and easily.
YAML to JSON
Convert YAML data to JSON format.
JSON to YAML
Convert JSON data to YAML format.
Markdown to HTML
Convert Markdown text to HTML code.
HTML to Markdown
Convert HTML code to Markdown text.
Base32 Encoder / Decoder
Encode text to Base32 or decode Base32 strings back to the original.
Base58 Encoder / Decoder
Encode text to Base58 or decode Base58 strings back to the original. Used in cryptocurrencies like Bitcoin.
Image to Base64
Convert images to Base64 strings for use in CSS, HTML or APIs. Supports PNG, JPG, GIF, SVG and WebP.
Base64 to Image
Convert Base64 strings back to an image to visualize and download.
Unit Converter
Convert units of length, mass, temperature, area, volume and speed. Supports metric and imperial systems with instant conversion.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine in real time. Simple, fast and processed directly in your browser.
HTML to JSX
Convert HTML to React JSX automatically. Transforms class→className, for→htmlFor, converts attributes to camelCase and closes void tags.
Image Format Converter
Convert images between PNG, JPEG and WebP formats directly in your browser. No server upload — complete privacy.
🛠️ Utilities
Word Counter
Count words, characters with and without spaces, and paragraphs in real time. Ideal for writers, students and anyone working with text.
MD5 Hash Generator
Generate the MD5 hash of any text online — 32 hexadecimal characters calculated in the browser, no data sent to any server.
SHA-256 Hash Generator
Generate the SHA-256 hash of any text using the native Web Crypto API. 64-character hex hash, processed locally in your browser.
My IP Address
Discover your public IP address in seconds. See the IPv4 address assigned by your internet service provider (ISP).
Pomodoro Timer
Online Pomodoro timer to boost focus and productivity. 25-minute work cycles with 5-minute short breaks and configurable long breaks.
Number Picker
Pick random numbers without repetition between a minimum and maximum. Ideal for lotteries, raffles and random selections.
Symbols Library
Browse Unicode symbols organized by category and copy with one click. Currency, arrows, math, punctuation and much more.
Unicode Text Styles
Transform your text into decorative styles using Unicode characters: bold, italic, fraktur, double-struck and monospace.
Stopwatch
Online stopwatch with hundredths precision, laps and history. Works in the browser with no installation.
Digital Clock
Full-screen digital clock showing local time in real time. Supports 12h and 24h format with fullscreen mode.
Countdown Timer
Countdown timer configurable in hours, minutes and seconds. With sound alert and progress bar.
Online Alarm
Set an alarm for any time of day directly in your browser. With sound alert and visual notification.
Slugify
Convert titles and text into URL-friendly slugs. Removes accents, converts to lowercase and replaces spaces with hyphens. Essential for SEO.
Color Picker
Pick a color and get its HEX, RGB and HSL values with one click to copy.
Image Color Picker
Load an image and discover the color of any pixel in real time. Hover to see HEX, RGB and HSL with a magnifier. Automatically extracts the dominant color palette.
Blank Screen
Fully white screen for projecting, cleaning the display or using as a focus background. Supports dark mode.
World Time Zones
See the current time in major cities around the world in real time. Compare time zones simply.
Symbol Table
Copy special symbols with one click: arrows, mathematical, currency, Greek letters, shapes and much more. Compatible with WhatsApp, Word and social networks.
Emoji List
Explore and copy over 500 emojis organized by category: faces, people, animals, food, travel, activities, objects and symbols. Search by name.
ASCII Table
Look up all 128 ASCII characters with decimal, hex, binary, HTML entity and description. Filter by type and search by character or code.
Alt Codes
Complete reference of Windows Alt codes: special symbols, accented letters, currencies, math symbols, Greek letters and more. Copy any character with one click.
SHA-1 Hash Generator
Generate the SHA-1 hash of any text using the native Web Crypto API. 40-character hex hash, processed locally.
CRC32 Calculator
Calculate the CRC32 checksum of any text. Returns the value in hexadecimal, decimal and binary. Processed in the browser.
Browser Info
Discover detailed information about your browser and system: name, version, OS, screen resolution, language, time zone and more.
Character Info
Get full information about any Unicode character: decimal code, hex, HTML entity, UTF-8 and official name. Click any character to inspect it.
Brazilian Bank Code Lookup
Look up the COMPE/ISPB code of major Brazilian banks. Search by name or code and find the official number for TED, DOC and PIX.
Flip Image
Flip an image horizontally, vertically or in both directions. Instant result in the browser — no data sent to servers.
Grayscale Image Converter
Convert any image to grayscale (black and white) in the browser. Instant processing without sending data to servers.
Sepia Effect
Apply the classic sepia (vintage photo) effect to any image directly in the browser. Download the result as PNG.
Invert Image Colors
Invert all colors in an image (negative effect). Each pixel is replaced by its RGB complement. Processed in the browser.
Rotate Image
Rotate an image by 90°, 180° or 270° (clockwise and counterclockwise). Instant result in the browser, with PNG download.
Resize Image
Resize any image by setting width and height in pixels. Option to maintain aspect ratio. Browser-side processing, no upload to servers.
Image Brightness & Contrast
Adjust the brightness and contrast of any image with real-time sliders. See the result instantly and download as PNG.
Color Adjuster
Lighten, darken, invert, desaturate or adjust the saturation of a HEX, RGB or HSL color. See the result in real time.
Color Mixer
Mix two colors and get the resulting color. Control the percentage weight of each color. Result in HEX, RGB and HSL.
WCAG Contrast Checker
Check the contrast between text and background colors per WCAG 2.1 guidelines. Shows the ratio and AA/AAA levels for normal and large text.
Online Notepad
Online notepad that automatically saves in the browser via localStorage. Your notes persist between sessions without any account or login.
Color Palette Generator
Generate harmonious color palettes from a base color. Schemes: monochromatic, analogous, complementary, triadic, tetradic and split-complementary.
SHA-512 Hash Generator
Generate 128-character SHA-512 hex hashes from any text using the native Web Crypto API.
SHA-384 Hash Generator
Generate 96-character SHA-384 hex hashes from any text using the native Web Crypto API.
Number Formatter
Format numbers with thousand separators, decimal places and currency symbols for BR (Real), US (Dollar) and EU (Euro) standards. Supports percentage.
Typing Speed Test
Measure your typing speed in words per minute (WPM) and characters per minute (CPM). Timed test with accuracy analysis.
Map Points
Plot geographic coordinates (latitude/longitude) on an interactive OpenStreetMap. Add markers by clicking the map or entering coordinates.
Map Route Planner
Create routes by adding waypoints on an interactive OpenStreetMap. View total distance in km and export points as CSV.
Color Shades Generator
Generate shades and tints of any color. Click to copy the HEX, RGB or HSL code. Perfect for design systems and UI development.
Color Blindness Simulator
See how an image appears to people with protanopia, deuteranopia, tritanopia or achromatopsia. Accessibility tool for designers and developers.
🔐 Security
Password Generator
Generate strong, random passwords with custom length, uppercase letters, numbers and symbols. Generated in the browser — no data leaves your device.
Password Strength Checker
Analyze the strength of any password: length, character classes, entropy in bits and resistance estimate. Processed in the browser — the password never leaves your device.
SQL Escape
Escape SQL strings by adding backslashes to single quotes and other special characters to prevent SQL injection.
Passphrase Generator
Generate strong, memorable passphrases made of random words. Easy to remember and hard to guess.
HMAC Generator
Generate HMACs (Hash-based Message Authentication Codes) with MD5, SHA-1, SHA-256, SHA-384, SHA-512 and SHA-3 algorithms.
Bcrypt Hash Generator
Generate secure bcrypt hashes from passwords and verify whether a password matches an existing bcrypt hash.
TOTP Code Generator (2FA)
Generate TOTP (Time-based One-Time Password) codes from a base32 secret, just like Google Authenticator. Useful for testing 2FA integrations without a phone.
File Hash (Checksum)
Calculate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of a file or text all at once. Perfect for verifying download integrity. Processed in your browser — no upload.
RSA Key Pair Generator
Generate RSA key pairs (public and private) of 2048 or 4096 bits directly in your browser. Useful for SSH, JWT, asymmetric encryption and certificates. No data sent to servers.
📈 SEO
Meta Tags Generator
Generate SEO meta tags — title, description, canonical and Open Graph — in seconds. Copy the generated HTML directly into your site.
Open Graph Preview
Preview how a page will look when shared on Facebook, Twitter/X, LinkedIn and WhatsApp. Fill in the meta tags and see the social cards in real time.
🧮 Calculators
Roman Numerals Converter
Convert Arabic numbers to Roman numerals and vice versa. Supports values from 1 to 3999. Instant bidirectional conversion.
GCD Calculator
Calculate the Greatest Common Divisor (GCD) of two or more numbers using the Euclidean algorithm. Instant result.
LCM Calculator
Calculate the Least Common Multiple (LCM) of two or more numbers. Instant result in the browser.
Percentage Calculator
Calculate percentages in three ways: X% of Y, X is what % of Y, and X increased or decreased by Y%. Instant result.
Rule of Three Calculator
Solve a simple rule of three online. Enter three values and automatically calculate the fourth.
Modulo Calculator
Calculate the remainder of integer division (modulo) between two numbers. Instant result in the browser.
Prime Factorization
Decompose any number into its prime factors. Instant result with the complete factorization.
Circle Area Calculator
Calculate the area of a circle from its radius. Formula: A = π × r². Instant result in the browser.
Square Area Calculator
Calculate the area of a square from its side. Formula: A = l². Instant result in the browser.
Rectangle Area Calculator
Calculate the area of a rectangle from its base and height. Formula: A = b × h. Instant result.
Triangle Area Calculator
Calculate the area of a triangle from its base and height. Formula: A = (b × h) / 2. Instant result.
Pentagon Area Calculator
Calculate the area of a regular pentagon from its side length. Instant result in the browser.
Hexagon Area Calculator
Calculate the area of a regular hexagon from its side length. Instant result in the browser.
Regular Polygon Area Calculator
Calculate the area of any regular polygon by entering the number of sides and side length.
Rhombus Area Calculator
Calculate the area of a rhombus from its major and minor diagonals. Formula: A = (D × d) / 2.
Trapezoid Area Calculator
Calculate the area of a trapezoid from its parallel bases and height. Formula: A = ((B + b) × h) / 2.
Parallelogram Area Calculator
Calculate the area of a parallelogram from its base and height. Formula: A = b × h. Instant result.
Ellipse Area Calculator
Calculate the area of an ellipse from its semi-major and semi-minor axes. Formula: A = π × a × b.
Annulus Area Calculator
Calculate the area of a circular ring (annulus) from its outer and inner radii. Formula: A = π × (R² − r²).
Circular Sector Area Calculator
Calculate the area of a circular sector from its radius and central angle in degrees. Formula: A = (π × r² × θ) / 360.
Severance Pay Calculator (Brazil)
Calculate Brazilian employment termination amounts: salary balance, proportional vacation, 13th salary, FGTS and dismissal fine.
Vacation Pay Calculator (Brazil)
Calculate vacation pay with the constitutional third per Brazilian labor law (CLT). Enter gross salary and vacation days to get the estimated net amount.
BMI Calculator
Calculate your Body Mass Index (BMI) and find your classification according to WHO. Enter weight and height for an instant result.
Ethanol vs Gasoline Calculator
Find out which fuel is more cost-effective: ethanol or gasoline. Enter the prices and see which is better for your flex-fuel car.
Interest Rate Calculator
Calculate simple and compound interest. Enter the principal, rate and period to get the interest and final amount.
Discount Calculator
Calculate the discount amount and final price from the original price and discount percentage. Instant result.
Linear Equation Solver
Solve first-degree equations (ax + b = 0) instantly. Enter the coefficients and see the value of x with step-by-step solution.
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0) with the quadratic formula. Shows the discriminant Δ and real roots.
Arithmetic Progression
Calculate the general term and sum of an Arithmetic Progression. Enter the first term, common difference and number of terms.
Geometric Progression
Calculate the general term and sum of a Geometric Progression. Enter the first term, ratio and number of terms.
Multiplication Table
Generate the multiplication table for any number. See the multiplication line by line up to any multiplier.
Sine Calculator
Calculate the sine of an angle in degrees, radians or gradians. Precise result with up to 10 significant digits.
Cosine Calculator
Calculate the cosine of an angle in degrees, radians or gradians. Precise result with up to 10 significant digits.
Tangent Calculator
Calculate the tangent of an angle in degrees, radians or gradians. Shows "Undefined" when the tangent does not exist.
Cotangent Calculator
Calculate the cotangent of an angle in degrees, radians or gradians. Shows "Undefined" when the cotangent does not exist.
Secant Calculator
Calculate the secant of an angle in degrees, radians or gradians. The secant is the reciprocal of the cosine.
Cosecant Calculator
Calculate the cosecant of an angle in degrees, radians or gradians. The cosecant is the reciprocal of the sine.
Arcsine Calculator
Calculate the arcsine (arcsin) of a value and get the angle in degrees, radians and gradians. Domain: −1 to 1.
Arccosine Calculator
Calculate the arccosine (arccos) of a value and get the angle in degrees, radians and gradians. Domain: −1 to 1.
Arctangent Calculator
Calculate the arctangent (arctan) of a value and get the angle in degrees, radians and gradians. Accepts any real number.
Arccotangent Calculator
Calculate the arccotangent (arccot) of a value and get the angle in degrees, radians and gradians. Accepts any real number.
Arcsecant Calculator
Calculate the arcsecant (arcsec) of a value and get the angle in degrees, radians and gradians. Domain: |x| ≥ 1.
Arccosecant Calculator
Calculate the arccosecant (arccsc) of a value and get the angle in degrees, radians and gradians. Domain: |x| ≥ 1.
List Statistics
Calculate complete statistics for a list of numbers: sum, mean, median, mode, min, max, range and standard deviation.
Volume Calculator
Calculate the volume of geometric solids: cube, sphere, cylinder, cone, pyramid and rectangular prism. Instant result with the formula used.
Prime Number Checker
Check if a number is prime. Shows the prime factorization, the previous prime and the next prime. Instant result.
Combinations & Permutations
Calculate combinations C(n,k) and permutations P(n,k) with formulas and results for large numbers. Essential for combinatorics.
Fibonacci Sequence Generator
Generate the first N terms of the Fibonacci sequence. Shows the sequence, the nth term and the sum of all terms.
Weighted Average Calculator
Calculate the weighted average by entering values and weights in parallel lists. Ideal for calculating grades, scores and weighted metrics.
Speed, Distance & Time Calculator
Calculate speed, distance or time from the other two values. Supports km/h, m/s and mph. Ideal for sports, travel and physics.
Pythagorean Theorem Calculator
Calculate any side of a right triangle from the other two. Enter two sides and get the third with the formula a² + b² = c².
Root Calculator
Calculate the square root, cube root or nth root of any number. Result with 10 decimal places of precision.
Power Calculator
Calculate the power aⁿ of any base and exponent, including negatives and decimals. Shows the result in scientific notation when necessary.
Compound Interest Calculator
Calculate final amount, accumulated interest and return with compound interest. Supports initial capital, monthly contributions and monthly or annual rates.
Time Calculator
Add time durations in hours, minutes and seconds, and convert between milliseconds, seconds, minutes, hours and days.
Loan Calculator
Simulate loans and financing with a full amortization table. Calculate installments, total interest, and the real cost of credit.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and Basal Metabolic Rate (BMR). Find out how many calories you need per day and your macro breakdown.
Function Animation
Visualize and animate mathematical functions f(x, t) in real time. The parameter t varies automatically — perfect for waves, trig functions and dynamic equations.
Parametric Curves
Animate and plot parametric curves defined by x(t) and y(t). Explore Lissajous, spirals, epicycloids, roses and other classic curves.
Aspect Ratio Calculator
Calculate the aspect ratio of any resolution (e.g. 1920×1080 = 16:9). Or calculate the missing dimension from a ratio and one side.
Tip Calculator
Calculate tip and split the bill among multiple people. Enter the total, tip percentage and number of people to see the per-person amount.
📄 Text
Reverse Text
Reverse any text character by character online. Instant result in the browser, no data sent to servers.
Remove Accents
Remove accents and special characters from text. Useful for normalizing data, generating slugs and preparing text for legacy systems.
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase and snake_case. Instant result in the browser.
Number to Words (Portuguese)
Convert numbers to words in Portuguese (por extenso). Supports positive and negative integers and values up to hundreds of millions.
Alphabetical Sort
Sort lines of text in ascending or descending alphabetical order. Option to remove duplicates. Instant result in the browser.
Occurrence Counter
Count how many times a word or phrase appears in a text. With optional case-insensitive search.
Text to HTML Entities
Encode special characters as HTML entities (<, >, &) or decode HTML entities back to plain text.
Text Truncator
Truncate text to a character or word limit. Option to add ellipsis at the end. Ideal for summaries and previews.
String Splitter
Split a string into parts using a custom delimiter (comma, semicolon, space, newline or any character).
Remove Line Breaks
Remove or replace line breaks from text. Replace with space, comma or any other character. Instant result.
Remove Duplicate Lines
Remove duplicate lines from text instantly. Option to ignore case and sort the result. Processed in the browser.
Find and Replace
Find and replace text with regular expression support. See the number of substitutions made. Processed in the browser.
Add Text to Each Line
Add a prefix, suffix or both to each line of a text. Useful for bulk formatting of lists and data.
Remove Extra Spaces
Remove double spaces, tabs and leading/trailing spaces from each line. Clean text copied from PDFs or web pages.
Extract Numbers from Text
Extract all numbers from a text. Options to include decimals and negatives. Result as a list, one per line.
Reverse List
Reverse the order of lines in a list or text. Paste the list and get the lines in reverse order instantly.
Tabs ↔ Spaces Converter
Convert tabs to spaces or spaces to tabs. Set the tab size. Processed in the browser.
Remove Empty Lines
Remove all blank lines from a text. Option to also remove lines with only spaces. Instant result.
Line Counter
Count the number of lines in a text. Shows total lines, non-empty lines and empty lines. Real-time result.
Filter Lines
Filter lines of a text or list that contain (or do not contain) a term. Supports regex and case-insensitive option.
Repeat Text
Repeat a text or line N times with a configurable separator: new line, comma, space or any custom character.
Letter Frequency Counter
Analyze the frequency of each letter in a text. See how many times each letter appears, with total count and percentage.
Number Lines
Add line numbers to any text. Configure the starting number, separator and option to skip empty lines. Instant result.
Extract Emails from Text
Find and extract all email addresses from a text or copied web page. Option to remove duplicates. Processed in the browser.
Extract URLs from Text
Find and extract all links and URLs from a text. Option to remove duplicates and filter by protocol. Processed in the browser.
Compare Two Lists
Compare two lists and find: intersection, union, items unique to each list and symmetric difference. One item per line. Option to ignore case.
Remove Punctuation
Remove punctuation, special symbols or digits from text. Configure what to remove and see the result instantly.
Unique Words Extractor
Extract all unique words from a text. Options to ignore case, sort and display the frequency of each word.
Palindrome Checker
Check if a word or phrase is a palindrome (reads the same forwards and backwards). Options to ignore spaces, accents and case.
Markdown Editor
Online Markdown editor with real-time preview. Write in Markdown and see the formatted result instantly.
Sort Lines
Sort lines of text alphabetically, reverse the order, shuffle randomly or number the lines.
Trim Lines
Remove leading and trailing spaces and tabs from each line of text. Useful for cleaning code or copied data.
ASCII Art Generator
Convert text into stylized ASCII art. Generate banners, decorative headers and borders in various styles using text characters. Entirely in your browser.
📅 Dates
Date Difference Calculator
Calculate the difference in days, weeks, months and years between two dates. Instant result in the browser.
Add Days to Date
Calculate the resulting date when adding N days to a start date. Instant result with correct leap year handling.
Subtract Days from Date
Calculate the resulting date when subtracting N days from a date. Instant result with correct leap year handling.
Calendar with Brazilian Holidays
View all 12 months in one page with Brazilian national holidays highlighted. Navigate between years and check fixed and movable holidays.
Time Lived Calculator
Discover exactly how long you have lived: years, months, days, hours and weeks since your date of birth.
Business Days Calculator
Calculate the number of business days (Monday to Friday) between two dates. Shows total days, business days and weekends.
🎮 Games
Coin Flip
Flip a coin online. Click to toss and see the result with animation.
Virtual Dice
Roll a virtual dice with 4, 6, 8, 10, 12 or 20 sides directly in the browser.
Spin the Wheel
Add options, spin the wheel and let chance decide. Ideal for raffles and random decisions.
Team Sorter
Divide a list of players into balanced teams randomly.
Randomize List
Shuffle a list of items into random order. Paste your list and click Shuffle.
Name Picker
Draw a name from a list without repetition. Ideal for raffles, secret santa and giveaways.
Scoreboard
Simple scoreboard for two teams. Add points and track the result in real time.
Manual Counter
Clickable counter to count anything: reps, items, votes or events.
Mega-Sena Number Generator
Generate random numbers for Mega-Sena (Brazil's biggest lottery). Choose 6 to 15 numbers from 1 to 60, with optional even/odd filters.
Quina Number Generator
Generate random numbers for Quina lottery. Choose 5 to 15 numbers from 1 to 80, with optional even/odd filters.
Lotofácil Number Generator
Generate random numbers for Lotofácil lottery. Choose 15 to 20 numbers from 1 to 25.
Lotomania Number Generator
Generate 50 random numbers for Lotomania lottery. Numbers from 0 to 99, with optional even/odd filters.
Dupla-Sena Number Generator
Generate random numbers for Dupla-Sena lottery. Two independent draws per ticket, 6 to 15 numbers from 1 to 50.
Timemania Number Generator
Generate 10 random numbers and a soccer team for Timemania lottery. Numbers from 1 to 80.
Dia de Sorte Number Generator
Generate random numbers and a lucky month for the Dia de Sorte lottery. Choose 7 to 15 numbers from 1 to 31.
Super Sete Number Generator
Generate random numbers for Super Sete lottery. One number (0–9) per column across 7 independent columns.
+Milionária Number Generator
Generate random numbers and trevos for the +Milionária lottery. 6 to 12 numbers (1–50) and 2 to 6 trevos (1–6).
🛠 Dev
Strikethrough Text Generator
Transform any text into strikethrough text using Unicode combining characters. Works on social networks.
Zalgo Text Generator
Generate creepy Zalgo text with overlapping diacritical characters. Control the intensity of the effect.
Text Diff
Compare two texts and see the differences highlighted line by line. Useful for reviewing documents and code.
JSON Formatter
Format, validate and minify JSON online. Paste raw JSON and get a readable, indented version.
Regex Tester
Test regular expressions in real time. See highlighted matches and captured groups.
Cron Expression Editor
Parse and build cron expressions with human-readable descriptions, next execution times and shortcuts for common schedules.
JWT Decoder
Decode and inspect JWT (JSON Web Tokens). View the header, payload and verify expiration. Processed 100% in the browser — the token never leaves your device.
CSS Gradient Generator
Create linear and radial CSS gradients with real-time preview. Adjust colors, positions and angle. Copy the CSS code with one click.
JSON ↔ CSV Converter
Convert data between JSON (array of objects) and CSV bidirectionally. Paste and convert instantly in the browser, no file upload needed.
PX ↔ REM / EM Converter
Convert pixels to REM and EM and vice versa with configurable base. Reference table with the most common CSS sizes. Essential for web.
CSS Box Shadow Generator
Create CSS box shadows with real-time preview. Configure multiple shadow layers, color, blur, spread and inset. Copy the CSS code.
URL Analyzer
Decompose any URL into its components: protocol, host, pathname, query parameters and hash. Inspect query strings individually.
HTML Formatter
Format and indent HTML code for better readability. Ideal for reviewing and debugging HTML quickly.
HTML Minifier
Minify HTML code by removing unnecessary whitespace and comments to reduce file size in production.
HTML Escape / Unescape
Escape special HTML characters (<, >, &, ", ') to HTML entities and convert entities back to text.
HTML Validator
Check for syntax and structure errors in HTML code. Identify unclosed tags and common problems.
HTML Tag Remover
Remove all HTML tags from text, leaving only the pure content without markup. Useful for extracting text from HTML.
CSS Formatter
Format and indent CSS code for better readability and maintenance.
CSS Minifier
Minify CSS code by removing whitespace, comments and unnecessary characters for production use.
JavaScript Formatter
Format and indent JavaScript code for better readability and debugging.
JavaScript Minifier
Minify JavaScript code by removing whitespace and comments to reduce file size in production.
JavaScript Escape / Unescape
Escape JavaScript strings by adding backslashes before special characters and convert back to the original.
JSON Validator
Validate JSON data to check for syntax errors. Detailed error report with line and position of the problem.
JSON Escape / Unescape
Escape strings for use in JSON by adding backslashes and convert JSON strings back to the original text.
XML Formatter
Format and indent XML code for better readability and inspection.
XML Minifier
Minify XML data by removing unnecessary whitespace and line breaks for production.
XML Validator
Validate XML data to check for syntax and structure errors.
XML Escape / Unescape
Escape special XML characters (<, >, &, ", ') to entities and convert XML entities back to text.
YAML Validator
Validate YAML data to check for syntax and indentation errors.
SQL Formatter
Format SQL code for better readability. Supports SELECT, INSERT, UPDATE, DELETE and other commands.
SQL Minifier
Minify SQL code by removing unnecessary whitespace and comments.
JWT Token Decoder
Decode JWT (JSON Web Tokens) and view the header, payload and signature. Automatically detects expiration. Useful for debugging API authentication.
HTML Table Generator
Paste CSV, TSV or semicolon-separated data and instantly generate an HTML table with thead, tbody and live preview.
HTML Preview
Write HTML, CSS and JavaScript and see the rendered result in real time. Isolated sandbox — no code is sent to any server.
HTTP Status Codes
Look up all HTTP status codes with names and descriptions. Search by code or keyword. Quick reference for developers.
Unix Permissions Calculator (chmod)
Calculate Unix file permissions visually. Check read, write and execute for owner, group and others to get the octal code (e.g. 755) and symbolic notation (e.g. rwxr-xr-x).
User-Agent Parser
Parse User-Agent strings and identify browser, version, operating system and device type. Perfect for debugging access logs.
Case Converter
Convert text between camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, dot.case, Title Case and more with one click. Perfect for renaming variables and API fields.
IPv4 Subnet Calculator
Calculate IPv4 subnets with CIDR notation. Enter an IP address and prefix (e.g. 192.168.1.0/24) to get the network address, broadcast, host range, subnet mask and binary representation.
Markdown Table Generator
Build Markdown tables visually — add rows and columns, edit cells and copy the GFM syntax ready for README, Notion or GitHub. No manual formatting.
Docker Run → Compose
Convert a docker run command to the equivalent docker-compose.yml automatically. Maps ports, volumes, environment variables, networks and restart policies.
SVG Optimizer
Reduce SVG file size by removing metadata, comments, editor attributes (Inkscape, Illustrator) and unnecessary whitespace. Processed in your browser.
CSS Clamp Calculator
Generate CSS clamp() values for fluid typography and spacing. Enter minimum/maximum sizes and viewport widths to get a ready-to-paste clamp() function.
CSV Validator & Viewer
Validate, parse and visualize CSV data in table format. Automatically detects delimiters (comma, semicolon or tab) and highlights formatting errors.
JSON Comparator
Compare two JSON objects and visualize differences side by side: added, removed and changed fields. Supports nested structures. Processed in your browser.