JSON Formatter — Validate, Beautify and Minify
Beautify, validate, or minify JSON with clear error messages
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Convert data formats, encode strings, and transform units entirely in your browser: a JSON formatter that validates, beautifies, and minifies; JSON ↔ CSV and YAML ↔ JSON; an XML formatter and a Markdown to HTML converter; URL and HTML encoding; Unix timestamps; HEX/RGB/HSL colors; number bases; and a unit converter spanning 28 categories. Free, private, and no sign-up — nothing is uploaded to a server. Looking for JPG↔PNG or PDF conversion? Use Image Tools and PDF Tools — linked below.
by NeedAnyToolBeautify, validate, or minify JSON with clear error messages
Convert JSON arrays of objects into CSV
Turn CSV tables into JSON arrays
Convert between YAML and JSON in either direction
Pretty-print or minify XML with validation
Convert Markdown to HTML for previews and embeds
Percent-encode and decode URL strings safely
Escape and unescape HTML entities
Convert HEX, RGB, and HSL color values
Convert epoch seconds or milliseconds to a date, and a date back to a Unix timestamp, in your browser.
Convert between decimal, hex, binary, and octal
Meters, Kilometers, Miles, Feet, Inches, Nautical miles
Kilograms, Grams, Pounds, Ounces, Metric tons, Stones
Celsius, Fahrenheit, Kelvin, and Rankine scales
Square meters, Sq km, Acres, Hectares, Sq ft, Sq mi
Liters, Milliliters, Gallons, Quarts, Cups, Cubic meters
km/h, mph, m/s, knots, feet per second
Seconds, Milliseconds, Minutes, Hours, Days, Weeks, Years
Bits, Bytes, KB, MB, GB, TB, KiB, MiB, GiB, TiB
Joules, Kilojoules, Calories, Kilocalories, kWh, BTU
Pascals, Kilopascals, Bar, PSI, Atmospheres, mmHg
Watts, Kilowatts, Megawatts, Horsepower (hp)
Newtons, Kilonewtons, Dynes, Pounds-force (lbf)
Newton-meters (N·m) and Pound-force feet (lbf·ft)
Hertz (Hz), Kilohertz, Megahertz, Gigahertz, RPM
Kilograms/m³, Grams/cm³, Pounds/ft³
L/100km, km/L, MPG (US), MPG (Imperial)
Degrees (°), Radians, Gradians, Arcminutes, Arcseconds
Meters/s², Standard gravity (g₀), Feet/s²
bit/s, kbit/s, Mbit/s, Gbit/s, MB/s
Amperes (A), Milliamperes (mA), Microamperes (µA)
Volts (V), Millivolts (mV), Kilovolts (kV)
Ohms (Ω), Kilohms (kΩ), Megohms (MΩ)
Teaspoons, Tablespoons, Cups, mL, Liters, Fluid ounces
Grams, Kilograms, Ounces, Pounds in kitchen recipes
Points (pt), Picas (pc), Pixels (px @ 96 DPI), mm, inches
Diagonal screen size in Inches, Centimeters, Millimeters
Square meters, Sq ft, Acres, Hectares, Cents, Grounds
Grams, Tolas (11.6638g), Sovereigns / Pavans (8g), mg
Image and PDF conversion tools live in their own categories — we link them here instead of duplicating pages.
JPG, PNG, WebP, GIF, BMP — in Image Tools
Combine images into a PDF — in Image Tools
Export PDF pages as images — in PDF Tools
Create a PDF from plain text — in PDF Tools
Encode UTF-8 text as Base64 — in Text Tools
UPPER, lower, camelCase, and more — in Text Tools
Percent of, change, increase — in Calculators
Days between two dates — in Calculators
Data never leaves your browser.
Results in milliseconds.
No server upload ever.