🔄Converters
Converters turn data from one format into another — units of measure, number bases, colors, dates, currencies, JSON, CSV, YAML and more. They are the right tool when you have information in one format and need it in another, with nothing to install and no loss of precision.
165 tools
LESS to CSS Converter
Strips LESS @variables and // comments producing approximate CSS suitable for visual checking.
CSS to LESS Converter
Convert CSS stylesheets to LESS syntax, turning custom properties (--var) into @variables. Modernize your CSS and copy the ready-to-use code.
Stylus to CSS Converter
Explains converting Stylus templates (optional braces/colons) into standard CSS with examples.
CSS to Stylus Converter
Convert plain CSS into the concise Stylus syntax, without braces or semicolons. Paste your CSS and copy the Stylus to modernize your project styling.
JSONP to JSON Converter
Strips the callback wrapper of a JSONP response leaving only the JSON contained inside the parentheses.
BSON to JSON (text) Converter
Explains differences between binary BSON and JSON with a type table and textual conversion examples.
CBOR to JSON (text) Converter
Explains CBOR (RFC 8949), its types and how to represent compact binary values in textual JSON.
MessagePack to JSON (text) Converter
Explains the MessagePack binary format, its advantages and how to translate it into textual JSON.
YAML to NDJSON Converter
Explains how to represent YAML lists as NDJSON (one JSON object per line) with practical examples.
Cups to Grams (Sugar)
Convert cups of granulated sugar to grams instantly (1 cup ≈ 200 g). Nail your cake and dessert recipes even without a kitchen scale.
Cups to Grams (Flour)
Convert cups of all-purpose flour to grams instantly (1 cup ≈ 120 g). Nail your bread and cake recipes even without a kitchen scale.
Gas Mark to Celsius Converter
Convert gas oven settings (gas mark, scale 1 to 9) to degrees Celsius. Follow international recipes with the right temperature on your stove.
BPM to Delay (ms)
Convert your track's BPM into delay times (1/4, 1/8 and 1/16) in milliseconds. The quick way to dial in tempo-synced delay and reverb when producing music.
MIDI Number to Note Converter
Convert a MIDI note number (0 to 127) into the matching musical note with octave (e.g. 60 = C4). Handy for programming synths and virtual instruments.
Note to MIDI Number
Convert a musical note (like A4 or C#3) into its MIDI note number. Handy when programming synths, sequencers and virtual instruments.
Cents Difference Calculator
Calculate the difference in cents (hundredths of a semitone) between two frequencies. An essential tool for fine instrument tuning, microtonality and music study.
RGB to CIELAB Converter
Convert colors between RGB and CIELAB (via XYZ, D65 illuminant). Useful for graphic design, color management and measuring color differences accurately.
Base45 Encoder/Decoder
Encode and decode data in Base45, the format used in EU digital COVID certificates so they fit inside QR codes.
Base58 (Bitcoin)
Encode and decode text in Base58 using the Bitcoin alphabet, which drops the ambiguous characters 0, O, I and l. Handy for keys and addresses.
Base62 Converter (Short URLs)
Convert decimal numbers to Base62 (0-9, A-Z, a-z) and back. This is the scheme URL shorteners use to turn IDs into short codes.
Ascii85 (Adobe)
Encode and decode data in Ascii85 (Base85), the compact format used in PostScript and PDF, with the Adobe <~ and ~> delimiters.
Z85 Encoder/Decoder (ZeroMQ)
Encode and decode data in Z85, the ZeroMQ flavor of Base85 that uses an alphabet safe for strings and configuration files.
Base91 Encoder/Decoder
Encode and decode text in Base91, a more compact format than Base64 because it packs more data into each printable ASCII character.
Quoted-Printable
Encode and decode text in Quoted-Printable (RFC 2045), the format used in email to represent accents and special characters in plain ASCII.
Punycode / IDN Converter
Convert an internationalized domain name (IDN) into the Punycode (xn--) form that DNS uses. Useful for accented domains and for comparing lookalike addresses.
YAML to JSON Converter
Convert YAML to JSON right in your browser, with no data sent to any server. Paste the YAML and copy ready-to-use JSON for APIs, configs and scripts.
JSON to Markdown Table Converter
Convert an array of JSON objects into a formatted Markdown table, with header and alignment. Paste the JSON and copy a table ready for READMEs and docs.
JSON to HTML Table Converter
Convert an array of JSON objects into a ready HTML table, with header and rows. Paste the JSON and copy the code to drop straight into your page or email.
Yards to Meters Converter
Convert yards to meters instantly (1 yard = 0.9144 m). Handy for translating football field measurements, fabric lengths and imperial distances.
Horsepower to Watts Converter
Convert metric horsepower (PS) to watts instantly (1 PS = 735.5 W). Useful for comparing the power output of cars, motorcycles and machinery.
Bar to PSI Converter
Convert pressure from bar to PSI (pounds per square inch) instantly. Useful for tires, compressors, gauges and equipment using the imperial system.
L/100km to MPG Converter
Convert fuel economy from liters per 100 km to miles per gallon (MPG). Compare car efficiency between the European and US standards.
MPG to L/100km Converter
Convert fuel economy from miles per gallon (MPG) to liters per 100 km. Compare car efficiency between US and European standards.
km/L to L/100km Converter
Convert car fuel economy from kilometers per liter (km/L) to liters per 100 km. Compare vehicle efficiency in the standard used across Europe.
Tire Pressure PSI to BAR Converter
Convert tire pressure between PSI and BAR instantly. Inflate your car or motorcycle tires with the right unit for safety and fuel economy.
Engine Displacement cc to L
Convert engine displacement between cubic centimeters (cc) and liters (L). Useful for comparing car and motorcycle engines and reading spec sheets.
Torque Nm to lb·ft Converter
Convert torque between newton-meters (Nm) and pound-feet (lb·ft) instantly. Handy for mechanics, bolt torque specs and imported car manuals.
HP to kW Converter
Convert engine power between HP (horsepower) and kW (kilowatts) instantly. Useful for comparing the power of cars, motorcycles and machines.
Crop Factor by Sensor Size
Pick a camera format and get its focal length multiplier against full frame: APS-C 1.5 or 1.6, Micro Four Thirds 2.0, 1-inch 2.7, medium format 0.79.
Lux to EV Converter
Convert illuminance measured in lux to the exposure value (EV) at ISO 100. Useful for photographers to set aperture and shutter from a light meter.
35mm Equivalent Focal Length
Convert your lens focal length to the 35 mm (full frame) equivalent using the camera crop factor. Compare the field of view across different sensors.
Speed to Running Pace Converter
Convert average speed (km/h) into running pace (minutes per km) instantly. Great for runners planning workouts, races and target finish times.
Average Glucose to HbA1c Converter
Convert estimated average glucose (eAG) in mg/dL into the estimated HbA1c value. Useful for tracking diabetes control between blood tests.
ISO Country Code Converter
Convert country codes between ISO 3166 formats (alpha-2, alpha-3 and numeric) and the country name. Useful for development, forms and databases.
Codon to Amino Acid Translator
Translate a three-nucleotide RNA codon into its amino acid under the standard genetic code, including the three stop codons and the AUG start.
DNA to RNA Transcription Tool
Paste the coding strand of DNA and get the matching messenger RNA, with every thymine swapped for uracil. The sequence matches the gene, only in RNA.
DNA Complement Strand Tool
Generate the complementary strand of a DNA sequence by pairing bases (A↔T, G↔C). Paste the sequence and get the matching strand instantly for molecular biology.
DNA Reverse Complement Tool
Calculate the reverse complement of a DNA sequence, in the 5-to-3 direction. Essential for primer design and sequence analysis in molecular biology.
4-Band Resistor Color Code
Find the value of a 4-band resistor from its color code: two digits, a multiplier and tolerance. Result in ohms, with the tolerance as a percentage.
5-Band Resistor Color Code
Find the value of a 5-band resistor from its color code: three digits, a multiplier and tolerance. Result in ohms, with the tolerance as a percentage.
Ohms to Resistor Color Code
Convert a resistance value in ohms to the 4-band resistor color code. Find the colored stripes to build or identify electronic components.
AC Voltage Converter: Peak to RMS
Convert peak voltage to RMS on a sine wave and back: Vrms = Vp/√2. This is the maths that connects what the scope shows to what the multimeter reads.
AC Voltage Converter: Peak-to-Peak to RMS
Convert peak-to-peak voltage to RMS on a sine wave: Vrms = Vpp/(2√2). Peak-to-peak is what you read off the scope; RMS is what sizes the power.
dB SPL to Pascal Converter (Sound Pressure)
Convert sound pressure level in dB SPL to pascals using the 20 µPa hearing-threshold reference: p = 20 µPa × 10^(dB/20). 94 dB SPL works out at 1.0024 Pa, near enough 1 pascal.
dBu to Volts RMS Converter
Convert a level in dBu to RMS voltage against the 0.7746 V reference (1 mW into 600 Ω): V = 0.7746 × 10^(dBu/20). Pro line level, +4 dBu, is 1.228 V.
dBV to Volts RMS Converter
Convert a level in dBV to RMS voltage against the 1 V reference: V = 10^(dBV/20). Consumer line level, −10 dBV, is 0.316 V — which is not the same as dBu.
Hz to Bark Scale Converter (Critical Band)
Convert a frequency in hertz to the Bark critical-band scale with the Zwicker formula: 13·arctan(0.00076f) + 3.5·arctan((f/7500)²), the basis of audio masking.
Phon to Sone Converter (Perceived Loudness)
Convert loudness level in phons to sones, the scale where doubling the number means twice as loud: sone = 2^((phon−40)/10) above 40 phons.
Dog Age in Human Years
Convert your dog's age into human years using the science-based AVMA formula. Find your dog's real age by size and understand its life stage.
Gwei to ETH Converter
Convert values between gwei and ETH, the units of Ethereum. Essential for calculating gas fees and working with transactions on the ETH network.