About JSONKit

JSON Formatter

Beautify, pretty-print, and sort keys. Live validation as you type.

JSON Validator

Find syntax errors with exact line and column numbers.

JSON Minifier

Strip whitespace and see exact bytes saved.

JSON Diff

Deep-compare two JSON objects with color-coded output.

JSON Fixer

Auto-repair broken JSON — trailing commas, single quotes, comments.

JSONPath Tester

Test JSONPath expressions with live match results.

JSON Merge

Deep-merge two JSON objects or arrays into one.

JSON Sort

Sort a JSON array of objects by any field, asc or desc.

JSON Filter

Keep or remove specific keys from a JSON object.

JSON Size Analyzer

See which keys use the most bytes in your JSON.

JSON Schema Validator

Validate JSON against a schema with field-level error paths.

JWT Decoder

Decode tokens, inspect claims, and check expiry in your browser.

JSON to YAML

Bidirectional conversion between JSON and YAML.

YAML to JSON

Convert YAML config files to JSON objects instantly.

JSON to CSV

Export JSON arrays to spreadsheet-ready CSV.

CSV to JSON

Import CSV files and convert to JSON arrays.

JSON to XML

Well-formed XML output with configurable root tag.

XML to JSON

Parse XML and convert to a clean JSON object.

JSON to SQL

Generate CREATE TABLE and INSERT SQL from JSON.

CSV to SQL

Generate SQL from CSV — supports 4 dialects.

JSON to Markdown

Convert JSON arrays to GitHub Markdown tables.

JSON to HTML Table

Convert JSON arrays to styled HTML tables.

JSON to BSON

Generate MongoDB BSON code for Go, Node.js, Python.

JSON Lines

Convert between JSON arrays and NDJSON format.

TOML to JSON

Convert Cargo.toml, pyproject.toml and other TOML to JSON.

JSON to TOML

Convert JSON objects to TOML configuration format.

Excel to JSON

Convert .xlsx, .xls, and .csv spreadsheets to JSON arrays.

JSON to Excel

Export a JSON array to a downloadable .xlsx workbook.

JSON to Protobuf / Avro

Generate a Protobuf or Avro schema from a JSON sample.

JSON Schema Generator

Infer JSON Schema Draft 2020-12 from any JSON object.

Visual JSON Schema Builder

Build a JSON Schema visually — no sample JSON required.

JSON Schema to TypeScript

Generate TypeScript interfaces from a JSON Schema.

GraphQL to TypeScript

Generate TypeScript types from a GraphQL schema (SDL).

OpenAPI to TypeScript

Generate TypeScript interfaces from an OpenAPI or Swagger spec.

JSON to TypeScript

Generate TypeScript interfaces from any JSON.

JSON to Zod Schema

Generate Zod validation schemas from JSON.

JSON to Go Struct

Generate Go structs with json tags.

JSON to Rust Struct

Generate serde Serialize/Deserialize Rust structs.

JSON to Python

Generate dataclasses, TypedDict, or Pydantic v2 models.

JSON to Java POJO

Generate Java classes — Jackson or Lombok.

JSON to Kotlin

Generate Kotlin data classes with annotations.

JSON to C# Class

Generate C# classes for System.Text.Json or Newtonsoft.

JSON to Swift Struct

Generate Swift Codable structs with CodingKeys mapping.

JSON to Dart Class

Generate Dart classes with fromJson/toJson for Flutter.

JSON to PHP Class

Generate PHP classes with typed properties from JSON.

JSON to Mongoose Schema

Generate Mongoose Schema definitions from JSON objects.

JSON to Test Fixtures

Generate Go testify, Jest, and pytest test fixtures.

Password Generator

Generate strong, cryptographically random passwords.

AES Encrypt / Decrypt

Encrypt and decrypt text with AES-256-GCM and a passphrase.

RSA Key Pair Generator

Generate an RSA public/private key pair in PEM format.

Base64 Encoder / Decoder

Encode or decode Base64 — standard, URL-safe, raw.

URL Encoder / Decoder

Encode or decode URLs and query strings.

Hash Generator

SHA-256, SHA-512, SHA-1 hashes and HMAC signatures.

UUID Generator

Generate UUID v4 and v7 identifiers in bulk.

Regex Tester

Test regex patterns with live match highlighting.

cURL to Code

Convert cURL commands to Go, Python, JS, PHP, and Ruby.

Unix Timestamp

Convert Unix timestamps to human-readable dates.

JSON Flatten

Flatten nested JSON to dot-notation and back.

Random JSON Generator

Generate realistic mock JSON data with custom fields.

HTML Escape / Unescape

Escape HTML entities for safe rendering and XSS prevention.

JSON Escape / Unescape

Escape JSON to a string literal or unescape it back.

Number Base Converter

Convert between decimal, hex, binary, and octal.

ENV ↔ JSON

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

Text Diff

Compare two text blocks line by line with diff highlighting.

jq Playground

Query and transform JSON with the full jq language.

JSON Explorer

Explore JSON visually as an interactive node graph.

JSON to Diagram

Visualize JSON as a tree diagram or Mermaid flowchart.

API Request Playground

Send REST requests and view JSON responses in a tree.

Embeddable JSON Viewer

Embed an interactive JSON tree on any site with one iframe.

JWT Builder

Build and sign JWTs with HS256, HS384, or HS512.

Cron Expression Parser

Parse cron expressions and preview the next run times.

String Case Converter

Convert between camelCase, snake_case, kebab-case, and more.

URL Parser / Inspector

Break any URL into protocol, host, path, and query parameters.

Color Converter

Convert colors between HEX, RGB, HSL, and named colors.

JSON Linter

Catch duplicate keys, mixed naming, and inconsistent array shapes.

JSON Patch Generator

Generate an RFC 6902 JSON Patch between two documents.

HAR to OpenAPI Generator

Generate a starting OpenAPI spec from a captured HAR file.

Slug Generator

Convert any title or string into a clean, URL-safe slug.

Word & Character Counter

Count words, characters, sentences, and estimated reading time.

SQL Formatter & Minifier

Beautify or minify SQL with clause line-breaks and keyword casing.

HTML Formatter & Minifier

Beautify or minify HTML with clean indentation and bytes saved.

CSS Formatter & Minifier

Beautify or minify CSS and see exactly how many bytes you saved.

JavaScript Formatter & Minifier

Beautify JS/TS or minify with terser and see bytes saved.

YAML Formatter & Validator

Beautify, re-indent, and validate YAML with line-numbered errors.

XML Formatter & Minifier

Beautify or minify XML and check that it's well-formed.

Markdown Preview

Live GitHub-flavored Markdown preview with tables and task lists.

Mermaid Diagram Preview

Render Mermaid flowcharts, sequence, and ER diagrams.

HTML to JSX Converter

Convert HTML to React JSX — class→className, styles, self-closing tags.

CSS to Tailwind

Convert CSS declarations into Tailwind utility classes.

SVG to JSX

Convert SVG markup into a React-ready JSX component.

QR Code Generator

Generate QR codes for URLs, Wi-Fi, email, and more — with an optional logo overlay.

Code Screenshot Generator

Turn code or JSON into a beautiful, shareable image with custom backgrounds.

Image to Base64

Convert an image to a Base64 data URI for CSS, HTML, or JSON.

Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences, or words.

AI JSON Assistant

Fix, explain, convert, and generate JSON, schema, mock data, queries and regex with AI.

AI JSON Query Generator

Describe what to extract in plain English — get a jq filter and JSONPath expression.

AI JSON Schema Explainer

Paste a JSON Schema and get a plain-English explanation of what it validates.

AI Regex Generator & Explainer

Generate a regex from plain English, or have any regex explained.

AI SQL Generator

Turn plain English into SQL for Postgres, MySQL, SQLite, or SQL Server.

AI Mock Data Generator

Generate a realistic JSON array of test data from a description.

AI Cron Generator

Convert a plain-English schedule into a cron expression with an explanation.