Free Online JSON Tools

Format, validate, and minify JSON with syntax highlighting

Compare two JSON objects side-by-side and highlight differences

Export JSON arrays to CSV with nested object flattening

Parse CSV files into structured JSON arrays

Convert JSON objects to XML with pretty-print output

Parse XML and convert to clean JSON

Convert between JSON and YAML formats bidirectionally

Parse URL query parameters into JSON with nested support

Convert between comma-separated and tab-separated formats

Sort JSON object keys alphabetically or in reverse

Flatten nested JSON to dot-notation or unflatten back

Generate a JSON Schema from any JSON object

Convert JSON to TypeScript interfaces instantly

Generate Go structs from JSON objects

Generate Python dataclasses or TypedDicts from JSON

Generate Java POJO classes from JSON

Generate C# classes from JSON objects

Generate Rust structs from JSON objects

Generate Kotlin data classes from JSON

Test JSONPath expressions against JSON documents

Minify JSON by stripping all whitespace for smaller payloads

Validate JSON syntax with error location and structure report

Convert JSON objects to PHP short array syntax

Generate Swift Codable structs from JSON samples

Generate Dart classes with fromJson factories for Flutter

Convert JSON to Ruby hash literals with symbol or string keys

Generate Scala case classes from JSON samples

Generate CREATE TABLE and INSERT statements from JSON arrays

Generate GraphQL SDL type definitions from JSON

Generate Zod validation schemas from sample JSON

Generate proto3 message definitions from JSON

Render JSON arrays as clean escaped HTML tables

Convert JSON arrays to aligned Markdown tables

Deep-merge multiple JSON objects with array strategy control

Convert JSON arrays to newline-delimited JSON Lines

Parse JSON Lines / NDJSON into a pretty JSON array

Strip comments and JSON5 syntax to produce strict JSON

Convert JSON to TOML configuration format

Parse TOML config files into pretty-printed JSON

Find which keys dominate your JSON payload size

Join broken lines into flowing text with paragraph control

Convert code indentation between tabs and spaces

Randomize the order of lines with a fair shuffle

Flip the order of lines from last to first

Spell out numbers in English — integers and decimals

Parse English number words back into digits

Repeat any text N times with custom separators

Flip text 180° with Unicode look-alike characters

Reverse text with mirrored Unicode glyphs

Convert text to Unicode sᴍᴀʟʟ ᴄᴀᴘs

Generate Unicode 𝗯𝗼𝗹𝗱, 𝘪𝘵𝘢𝘭𝘪𝘤, and 𝚖𝚘𝚗𝚘 text

Generate cursed glitch text with combining marks

Convert text to 1337 h4x0r-style substitutions

Spell text as Alfa Bravo Charlie and decode back

Translate English to Pig Latin with case preserved

Collapse, trim, or strip whitespace from text

Remove repeated words, keeping first occurrences

Build acronyms from the first letters of phrases

Sort words alphabetically or by length with dedup

Read text aloud with your browser's voices

13 Unicode font styles from one input

Cross out, underline, or overline text with Unicode

Copy zero-width and blank Unicode characters

Strip all emojis and pictographs from text

Analyze keyword frequency and density for SEO

Convert numbers between decimal and Base36

Convert numbers to the URL-shortener Base62 alphabet

Encode and decode ASCII85 / Base85 data

Encode and decode email MIME quoted-printable

Shift cipher with adjustable rotation and brute force

Polyalphabetic keyword cipher — encrypt and decrypt

Mirror-alphabet cipher — A↔Z, B↔Y

Zigzag transposition cipher with 2-10 rails

Custom monoalphabetic cipher with your own alphabet

Letters to alphabet positions — A=1 … Z=26

Text to raw UTF-8 bytes in hex, binary, or decimal

Convert binary data between Base64 and hex

URL-safe Base64 — the JWT and web token variant

Text to Unicode code points and back

Preview and download images from Base64 strings

Reveal code points behind emoji, including ZWJ sequences

Convert text to octal bytes and back

Francis Bacon's steganographic AB cipher

Strings to JS escapes, char codes, or HTML entities

Normalize to NFC/NFD/NFKC/NFKD and strip diacritics

Convert between Celsius, Fahrenheit, Kelvin, and Rankine

Convert between kilograms, pounds, ounces, stones, and tons

Convert between km/h, mph, m/s, knots, and Mach

Convert between square meters, square feet, acres, and hectares

Convert between liters, gallons, cups, milliliters, and cubic feet

Convert between PSI, bar, pascal, atm, and mmHg

Convert between joules, calories, kWh, BTU, and electronvolts

Convert between degrees, radians, gradians, and arcseconds

Convert between Hz, kHz, MHz, GHz, RPM, and rad/s

Convert date and time between world time zones with DST handling

Days, weeks, months, and weekdays between two dates

Exact age in years, months, and days from a date of birth

Convert durations between seconds, minutes, hours, and HH:MM:SS

ISO 8601 week number and day of year for any date

Convert decimals to simplified fractions and mixed numbers

Convert fractions and mixed numbers to decimals and percentages

Percent of a number, percent change, increase and decrease

Simplify ratios and convert them to 1:n and percentage form

Find aspect ratios of resolutions and scale dimensions proportionally

Convert between decimal, scientific, E-notation, and engineering form

Convert CSV data into clean HTML table markup

Convert CSV data into GitHub-flavored Markdown tables

Generate SQL INSERT statements and CREATE TABLE from CSV

Convert .env files to JSON and JSON back to .env

Convert JSON into PHP array syntax — [] or array() style

Minify JavaScript by removing comments and whitespace

Compress CSS by stripping comments and whitespace

Minify HTML while preserving pre, textarea, and script blocks

Collapse SQL queries to one line, stripping comments

Remove comments and inter-element whitespace from XML

Escape text for JS string literals and decode escapes

Escape and unescape the five XML special characters

Escape single quotes for safe SQL string literals

Format, validate, and re-indent YAML documents

Build aligned Markdown tables from CSV rows or a blank template

Generate a linked table of contents from Markdown headings

Build HTML tables from rows of data or an empty template

Generate iframe embed code with size and security options

Turn YouTube links into responsive, privacy-friendly embed code

Build mailto links with subject, body, CC, and BCC

Create wa.me click-to-chat links with a pre-filled message

Add UTM campaign parameters to URLs for analytics tracking

Generate og: meta tags for rich social link previews

Generate twitter: meta tags for X/Twitter link cards

Generate JSON-LD structured data for SEO rich results

Generate Apache 301/302 redirect rules

Generate the complete set of favicon link tags

Generate MIT, Apache, BSD, GPL, ISC, or Unlicense text

Build shields.io badges for README files

Generate a .editorconfig file for consistent code style

Generate .dockerignore files with stack presets

Convert docker run commands to docker-compose.yml

Turn a URL list into a valid sitemap.xml

Press any key to see its JavaScript event codes

Build cURL commands with headers, auth, and body

Generate SHA-1 hashes from text

Generate SHA-512 hashes from text

Generate SHA-384 hashes from text

Generate SHA-224 hashes from text

Generate SHA-3 (Keccak) hashes in four sizes

Generate RIPEMD-160 hashes from text

Calculate CRC32 checksums from text

Compute SHA checksums of files locally in your browser

Verify HMAC JWT signatures and inspect claims

Encrypt and decrypt with DES or Triple DES (legacy)

Generate bcrypt .htpasswd entries for basic auth

Generate and decode HTTP Basic Authorization headers

Verify text against an expected hash digest

Generate cryptographically secure random bytes

Generate deterministic name-based UUIDs

Generate sortable, timestamped ULIDs

Generate compact URL-safe unique IDs

Generate MongoDB ObjectIds or decode their timestamps

Decode Discord and Twitter snowflake IDs

Identify hash algorithms from their format

Generate fictional US addresses for testing

Generate fictional user profiles for testing

Generate fictional company names and profiles

Generate phone numbers from reserved fictional ranges

Official sandbox card numbers for payment testing

Generate random nouns, verbs, and adjectives

Generate grammatical random sentences

Generate random emoji by category

Roll dice with RPG notation like 2d6+3

Flip a fair virtual coin — heads or tails

Pick random winners from a list

Split names into random, even teams

Generate memorable adjective-noun usernames

Generate rows of realistic records as JSON, CSV, or SQL

Generate brandable domain ideas from keywords

Generate random latitude/longitude points

Generate random nested JSON structures

Turn task descriptions into clean branch names

Format changes as Conventional Commits

QR codes that connect guests to your WiFi

Validate IBANs with mod-97 checksum and country rules

Validate BIC/SWIFT code structure

Validate ISBN-10/13 and convert between them

Validate EAN-8/13, UPC-A, and GTIN-14 check digits

Validate any number with the Luhn mod-10 algorithm

Validate phone IMEI numbers and decode the TAC

Validate vehicle VINs with the check digit

Validate securities ISINs with the check digit

Validate ZIP and postal codes for ten countries

Catch impossible dates like Feb 30 and leap-year errors

Check base64 validity and preview decoded content

Validate hex color codes and show RGB values

Validate JSON documents against a schema

Check XML well-formedness with line numbers

Find unclosed and mismatched HTML tags

Find CSS syntax errors — braces, colons, properties

Validate Kubernetes names against DNS-1123 rules

Validate and dissect Amazon Resource Names

Check branch names against git ref-format rules

Check password strength and entropy locally

Preview and copy every CSS cursor value

Compose CSS filters with live sliders

Build 2D transforms visually

Tune transition timing with a hover preview

Style custom scrollbars for WebKit and Firefox

Pure-CSS triangles with the border trick

Pure-CSS spinners — ring, dots, bars, pulse

Design buttons visually and copy the CSS

Pure-CSS tooltips from a data attribute

Frosted-glass card CSS with backdrop blur

Soft-UI dual shadows — flat, pressed, convex

Organic blob shapes from 8-value border-radius

Wavy section dividers as SVG or CSS background

Gradient-filled headlines with background-clip

Repeating backgrounds in pure CSS gradients

clamp() font sizes that scale with the viewport

Blend two colors at any ratio

Nearest CSS named color for any hex

See colors as colorblind users do

Turn design tokens into :root custom properties