JSON Tools

76+ free online JSON utilities for developers. Validate, format, convert, search, and analyze JSON data—all in your browser.

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Why Use Our JSON Tools?

Instant Processing

All tools run in your browser for immediate results

100% Private

Your JSON data never leaves your device

Copy & Download

Easily copy results or download as files

Always Free

No registration, no limits, completely free

All JSON Tools

A comprehensive suite of 76 JSON utilities organized by category

JSON Validator

Validates JSON syntax, highlights errors with line and column numbers

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JSON Schema Validator

Validates JSON data against a provided JSON Schema

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JSON Config Validator

Validates JSON configuration files and checks required keys

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JSON Linter

Detects syntax errors, duplicate keys, trailing commas

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JSON Duplicate Key Finder

Detects duplicate keys within JSON objects

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JSON Empty Field Finder

Identifies null, empty string, or missing values

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JSON Depth Analyzer

Calculates maximum nesting depth of a JSON structure

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JSON Key Frequency Analyzer

Analyzes how often each key appears in JSON

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JSON Array/Object Counter

Counts arrays, objects, keys, and values

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JSON Size Calculator

Calculates JSON size in bytes, KB, MB

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JSON Formatter/Beautifier

Formats raw JSON into readable indented structure

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JSON Minifier

Removes whitespace to reduce JSON size

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JSON Pretty Print

Converts compact JSON to human-readable format

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JSON Sorter

Sorts JSON keys alphabetically recursively

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JSON Diff Tool

Compares two JSON objects, highlights changes

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JSON Merge Tool

Merges JSON objects with configurable strategies

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JSON Patch Generator

Generates JSON Patch operations (RFC 6902)

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JSON Flatten Tool

Flattens nested JSON into dot-notation

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JSON Unflatten Tool

Converts flattened JSON back to nested structure

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JSON Transformer

Transforms JSON structure using custom rules

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JSON Rename Keys

Renames JSON keys across nested structures

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JSON Remove Keys

Removes specified keys from JSON recursively

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JSON Extract Sub-JSON

Extracts nested portions based on key path

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JSON Properties Extraction

Extract properties from json data

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JSONPath Query Tool

Runs JSONPath queries against JSON data

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JMESPath Query Tool

Executes JMESPath expressions for advanced querying

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JSON Filter Tool

Filters JSON arrays based on conditions

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JSON Map Reduce

Applies map/reduce transformations on arrays

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JSON Key Extractor

Extracts all unique keys from JSON

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JSON Value Search

Searches JSON by key or value with highlights

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JSON Escape/Unescape

Escapes or unescapes special characters

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JSON Encode/Decode

URL encodes and decodes JSON strings

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JSON Base64 Encode/Decode

Encodes JSON to Base64 and decodes back

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JSON JWT Decoder

Decodes JWT tokens into readable JSON

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JSON Sensitive Data Masker

Masks emails, tokens, passwords in JSON

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JSON Obfuscator

Minifies and obfuscates JSON for safe sharing

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JSON Array Generator

Generates JSON arrays with configurable types

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JSON Random Object Generator

Generates random JSON objects for testing

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JSON API Response Generator

Generates mock API-style JSON responses

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JSON Pagination Generator

Wraps JSON with pagination metadata

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JSON Nested Structure Generator

Generates deeply nested JSON for stress testing

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JSON Enum Generator

Generates JSON enums and value lists

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JSON Date Time Generator

Generates ISO, UTC, custom datetime values

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JSON Schema Example Generator

Generates example JSON from JSON Schema

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JSON API Formatter

Formats JSON API responses consistently

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JSON API Error Formatter

Generates standardized JSON error responses

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JSON to Fetch Code Generator

Generates JavaScript fetch API code

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JSON to Axios Code Generator

Generates Axios request code snippets

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JSON to GraphQL Input

Converts JSON to GraphQL input syntax

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JSON to SQL Insert

Generates SQL INSERT statements from JSON

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JSON to MongoDB

Converts JSON to MongoDB document format

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JSON Env Converter

Converts JSON config to .env format

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JSON to CSV

Converts JSON arrays to CSV format

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CSV to JSON

Parses CSV and converts to JSON

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JSON to XML

Transforms JSON to XML structure

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XML to JSON

Parses XML and converts to JSON

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JSON to YAML

Converts JSON to YAML format

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JSON to TypeScript

Generates TypeScript interfaces from JSON

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JSON to JavaScript

Converts JSON to JavaScript objects

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JSON to Python

Converts JSON to Python dictionaries

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JSON to Java

Generates Java classes from JSON

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JSON to Go

Generates Go structs from JSON

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JSON to PHP

Converts JSON to PHP arrays

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JSON to C#

Generates C# classes from JSON

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JSON to Kotlin

Generates Kotlin data classes from JSON

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JSON to Swift

Generates Swift structs from JSON

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JSON to Markdown Table

Converts JSON arrays to Markdown tables

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JSON to TSV

Converts JSON to tab-separated values

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JSON to Text

Extracts text content from JSON

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JSON to Excel

Converts JSON to Excel format

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JSON Explainer

Explains JSON structure in plain language

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JSON Error Explanation

Explains JSON parsing errors and fixes

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JSON Structure Visualizer

Visualizes JSON as interactive tree

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JSON Step by Step Parser

Shows JSON parsing token by token

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JSON Playground

Live editor with instant formatting

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JSON Viewer

Tree view with expand/collapse, search

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Common Use Cases

API Development

Validate and format JSON responses from APIs, convert between formats for different integrations.

Data Migration

Convert JSON to CSV, XML, or other formats for data migration between systems.

Debugging

Find syntax errors, duplicate keys, and structural issues in JSON data quickly.

Data Analysis

Extract keys, search values, and analyze JSON structure for better understanding.

Configuration

Convert between JSON, YAML, and XML for different configuration file formats.

Testing

Generate mock data, random objects, and test payloads for development and QA.