Byte Converter
Converts any data-size unit to all other units at once.
Converters
Converters for units, numbers, text, time zones, data sizes, and data formats. Conversions run in your browser, so your files and text never leave your device.
All Converters
Bytes to KB
Converts bytes to kilobytes (KB) and kibibytes (KiB).
Bytes to MB
Converts bytes to megabytes (MB) and mebibytes (MiB).
Bytes to GB
Converts bytes to gigabytes (GB) and gibibytes (GiB).
Bytes to TB
Converts bytes to terabytes (TB) and tebibytes (TiB).
JSON to CSV
Turns an array of JSON objects into a CSV table.
CSV to JSON
Turns a CSV table into an array of JSON objects.
JSON to YAML
Turns JSON into readable YAML for configuration files.
YAML to JSON
Turns YAML configuration into JSON.
Length Converter
Meters, feet, inches, miles, km, and more.
Weight Converter
Kilograms, pounds, ounces, stone, tons, and carats.
Temperature Converter
Celsius, Fahrenheit, Kelvin, and Rankine.
Area Converter
Square meters, square feet, acres, hectares, and more.
Volume Converter
Liters, gallons (US and UK), cups, mL, and cubic units.
Speed Converter
km/h, mph, m/s, knots, ft/s, and Mach.
Time Converter
Seconds, minutes, hours, days, weeks, months, and years.
Pressure Converter
psi, bar, Pa, kPa, atm, mmHg, inHg, and torr.
Energy Converter
Joules, calories, kWh, BTU, eV, and foot-pounds.
Power Converter
Watts, kW, MW, horsepower, and BTU/h.
Angle Converter
Degrees, radians, gradians, arcminutes, and turns.
Torque Converter
N·m, kN·m, lbf·ft, lbf·in, and kgf·m.
Electric Charge Converter
Coulombs, mAh, Ah, µC, and elementary charges.
Blood Sugar Converter
Glucose in mg/dL and mmol/L, plus HbA1c to eAG.
Number Base Converter
Any base from 2 to 36, with binary, octal, decimal, and hex.
Decimal to Binary Converter
Decimal numbers to binary, with two's complement.
Roman Numerals Converter
Numbers to Roman numerals and back.
Number to Words Converter
Numbers spelled out in English, for checks too.
Binary to Gray Code Converter
Binary to reflected Gray code and back, step by step.
Case Converter
Text in 12 cases at once, from Title Case to snake_case.
Morse Code Translator
Text to Morse code and back, with sound.
ROT13 Encoder / Decoder
ROT13, Caesar shifts, ROT5, ROT18, and ROT47.
Text to NATO Alphabet
Text spelled out as Alfa, Bravo, Charlie, and back.
Text to Hex Converter
Text to hexadecimal bytes and back.
Text to Unicode Converter
Text to U+ code points, escapes, and entities.
Unicode to UTF-8 Converter
Code points or text to UTF-8 bytes, and back.
Text to Binary Converter
Text to 8-bit binary and binary to text.
Time Zone Converter
One time in many time zones, plus a meeting planner.
Date Format Converter
One date in ISO 8601, RFC 2822, SQL, Unix, and custom formats.
Lat/Long to DMS Converter
Latitude and longitude between decimal degrees and DMS.
CSV to SQL Converter
CSV to CREATE TABLE and INSERT statements.
CSV to HTML Table
CSV to accessible HTML table code, with a preview.
Markdown to HTML Converter
GitHub-flavored Markdown to formatted HTML code.
HTML to Text Converter
HTML to clean plain text, with lists and links kept.
PX to REM Converter
Pixels to rem, em, and pt for CSS.
Unit converters
Convert length, weight, temperature, area, volume, speed, time, pressure, energy, power, angle, torque, and electric charge. Every factor comes from the exact SI or NIST definition, so 1 inch is always 2.54 cm. There are also converters for blood sugar (mg/dL to mmol/L) and for PX to REM in CSS.
Data size converters
The Byte Converter shows one value in every unit at once. The bytes to KB, bytes to MB, bytes to GB, and bytes to TB pages answer a single conversion in one step.
Two systems are in use. SI units count in thousands, so 1 KB is 1,000 bytes. Binary units count in powers of two, so 1 KiB is 1,024 bytes. Drive makers use SI units, while Windows divides by 1,024 and still writes "GB". That is why a new 1 TB drive shows up as about 931 GB.
Data format converters
- JSON to CSV and CSV to JSON move data between APIs and spreadsheets.
- JSON to YAML and YAML to JSON move data between APIs and config files for Docker Compose, Kubernetes, and CI pipelines.
- CSV to SQL writes INSERT statements for a database, and CSV to HTML Table builds a table for a web page.
- Markdown to HTML and HTML to Text move content between writing tools and web pages.
JSON is what most APIs send and receive. CSV opens directly in Excel and Google Sheets. YAML is easier for people to read and edit, which is why config files use it.
Numbers and text
The Number Base Converter handles any base from 2 to 36, and Decimal to Binary covers the most common case. Roman numerals, number to words, and Gray code have their own pages.
For text, the Case Converter switches between UPPER, Title Case, camelCase, snake_case, and more. Text to Hex, Text to Unicode, Unicode to UTF-8, and Text to Binary show the bytes behind each character. Morse code, ROT13, and the NATO alphabet spell text out in other codes.
Time zones, dates, and coordinates
The Time Zone Converter shows one moment in several cities, with daylight saving time applied. The Date Format Converter rewrites a date as ISO 8601, RFC 2822, SQL, or your own pattern, and Lat/Long to DMS switches coordinates between decimal degrees and degrees, minutes, and seconds.
Frequently asked questions
Is 1 KB 1,000 or 1,024 bytes?
In SI units 1 KB is 1,000 bytes. 1,024 bytes is 1 KiB. Every converter here shows both.
Are my files uploaded?
No. Files are read and converted in your browser.
What is the largest file I can convert?
5 MB per file for the JSON, CSV, YAML, and SQL converters.
How precise are the unit conversions?
Each one uses the exact definition of the unit, for example 1 lb = 0.45359237 kg. Results are calculated at full precision and rounded to 6 decimal places only for display.