Free online tools, no sign-up required
Generators, validators, converters and utilities — fast, secure and browser-based.
Over 18,000 online tools in one place
1001Ferramentas brings together calculators, generators, converters, validators and utilities for text, dates, SEO and security in a catalog organized into 11 categories. The idea is simple: you have a quick task to solve — convert a unit, validate a document, generate a strong password, work out the interest on a loan — and you want to do it without installing anything, without creating an account, and without ads getting in the way.
The vast majority of the tools run entirely in your browser. When you type a piece of text, a number, or upload a file, the computation happens right there, on your device — that data does not pass through our servers. For you that means two things: real privacy, and instant answers with no network wait.
The site is free and maintained by a small, independent team in Brazil. Each tool is tested and described case by case, and the guides dig into the ideas behind them — from how a check digit works to the difference between simple and compound interest.
Featured
Password Generator
Generate strong, random passwords with custom length, uppercase letters, numbers and symbols. Generated in the browser — no data leaves your device.
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.
Most Popular
Password Generator
Generate strong, random passwords with custom length, uppercase letters, numbers and symbols. Generated in the browser — no data leaves your device.
CPF Validator
Validate Brazilian CPF numbers instantly using the official algorithm. Useful for testing document validation in applications. No data sent to servers.
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.
Word Counter
Count words, characters with and without spaces, and paragraphs in real time. Ideal for writers, students and anyone working with text.
My IP Address
Discover your public IP address in seconds. See the IPv4 address assigned by your internet service provider (ISP).
How it works
Three steps, no installation.
1. Pick a tool
Browse the categories or search to find exactly what you need among thousands of utilities.
2. Use it in your browser
No sign-up, no download. Enter your data and the result appears instantly — almost everything runs locally on your device.
3. Copy or download
Copy the result with one click or download the generated file. Ready to use wherever you need it.
Categories
Guides to understand what is behind the tools
Practical articles that explain the concepts behind the tools — with examples, tables and step-by-step calculations.
Browse all guidesHow to Create a Strong Password (and Never Forget It)
What actually makes a password strong, the most common mistakes, and how to generate and remember secure passwords with passphrases and 2FA.
8 min read
Simple vs Compound Interest: The Difference That Changes Everything
The two formulas side by side, the snowball effect of compounding, the rule of 72, and where it hits your wallet on savings, loans and credit cards.
8 min read
How CPF and CNPJ Validation Works (the Check Digit)
The step-by-step check-digit algorithm for CPF and CNPJ (modulo 11), the new alphanumeric CNPJ, and why a valid format does not mean the number exists.
9 min read
Full Privacy
Everything runs in your browser. No data is sent to our servers.
No Ads
Clean interface, no pop-ups or distractions. Just what you need.
Works Everywhere
Responsive for mobile, tablet and desktop. No installation required.
Who is behind 1001Ferramentas
We are an independent project focused on delivering useful, fast tools that respect your privacy. Learn our story, get in touch, or read how we handle your data.
About the projectFrequently Asked Questions
Are the tools really free?
Yes. All tools are free with no usage limits. The site is supported by advertising, which lets us keep everything open and paywall-free.
Do I need to create an account?
No. None of the tools require sign-up or login. Just open and use.
Is my data sent to any server?
For most tools, no: processing happens in your browser and your data never leaves your device. A few tools query public APIs (such as postal-code lookup or currency rates), and in those cases the request goes straight to the provider — we explain each case in the Privacy Policy.
How do you ensure the results are correct?
Each tool uses documented formulas and algorithms, and utilities with pure logic have automated tests. Even so, results are informational: for important decisions, confirm with an official source or a professional.
Can I use the tools on mobile?
Yes. The site is fully responsive and works well on phone, tablet and desktop, with no app to install.
Who runs the site?
A small, independent team based in Brazil. You can find more on the About page and reach us through the Contact page.
Do the financial and health calculators count as advice?
No. BMI, calorie, interest, loan and similar calculators are educational, informational tools — they do not replace professional medical, financial, legal or accounting advice.
I found a bug or want to suggest a tool. What do I do?
We love getting corrections and suggestions. Use the Contact page with the subject "Bug" or "Suggestion" and we will get back to you.
Didn't find your answer? Get in touch. Contact