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Free JSON Formatter & Data Tools for Developers

Format JSON, validate XML, encode Base64, and process 119+ data formats instantly. Zero friction data formatting and developer productivity tools that just work.

Trending Data Formatters & Developer Tools

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JSON Formatter & Validator

Data Formatters & Validators

Format, validate, and beautify JSON/JSONC with key sorting, inline arrays, duplicate key detection, and rich error details—all locally.
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Base64 Encoder & Decoder

Encoding & Decoding

Encode, decode, and inspect Base64 payloads with URL-safe mode, line-break control, drag-and-drop input, and instant validation — all in your browser.
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URL Encoder & Decoder

Encoding & Decoding

Encode or decode full URLs and URI components with precise control over reserved characters, space handling, and percent encoding — perfect for debugging query strings and APIs.
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JWT Decoder & Validator

Encoding & Decoding

Inspect JSON Web Tokens with instant header/payload decoding, signature awareness, claim validation, and security warnings — all in-browser.
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CSV Formatter & Validator

Data Formatters & Validators

Format, validate, and convert CSV data with support for different delimiters, data type detection, sorting, filtering, and conversion to JSON or table format.
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XML Formatter & Validator

Data Formatters & Validators

Format, validate, minify, and convert XML with namespace-aware parsing, attribute sorting, JSON export, and instant error diagnostics — purpose-built for SOAP, RSS, and config workflows.
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YAML Formatter & Validator

Data Formatters & Validators

Format, validate, and convert YAML data with syntax checking, JSON conversion, and beautification options.
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JavaScript Beautifier & Minifier

Data Formatters & Validators

Format, beautify, and minify JavaScript code with proper indentation, syntax validation, and optimization. Supports ES6+, JSX, and modern JavaScript features with comprehensive formatting options.

Explore Data Formatters & Validators

View all Data Formatters & Validators
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JSON Formatter & Validator

Data Formatters & Validators

Format, validate, and beautify JSON/JSONC with key sorting, inline arrays, duplicate key detection, and rich error details—all locally.

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XML Formatter & Validator

Data Formatters & Validators

Format, validate, minify, and convert XML with namespace-aware parsing, attribute sorting, JSON export, and instant error diagnostics — purpose-built for SOAP, RSS, and config workflows.

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YAML Formatter & Validator

Data Formatters & Validators

Format, validate, and convert YAML data with syntax checking, JSON conversion, and beautification options.

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CSS Beautifier & Minifier

Data Formatters & Validators

Format, beautify, and minify CSS code with proper indentation, validation, and optimization. Supports CSS3, media queries, and nested rules with comprehensive formatting options.

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HTML Prettier Online - Beautifier & Formatter

Data Formatters & Validators

Format HTML code with prettier-style beautification online. Free HTML formatter with intelligent indentation, attribute sorting, validation, and minification — all in your browser.

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JavaScript Beautifier & Minifier

Data Formatters & Validators

Format, beautify, and minify JavaScript code with proper indentation, syntax validation, and optimization. Supports ES6+, JSX, and modern JavaScript features with comprehensive formatting options.

Explore Encoding & Decoding

View all Encoding & Decoding
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Base64 Encoder & Decoder

Encoding & Decoding

Encode, decode, and inspect Base64 payloads with URL-safe mode, line-break control, drag-and-drop input, and instant validation — all in your browser.
Binary

Base32 Encoder/Decoder

Encoding & Decoding

Encode and decode text using Base32 with support for multiple variants and formatting options
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URL Encoder & Decoder

Encoding & Decoding

Encode or decode full URLs and URI components with precise control over reserved characters, space handling, and percent encoding — perfect for debugging query strings and APIs.
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HTML Entity Encoder

Encoding & Decoding

Encode text to HTML entities using named, numeric, hexadecimal, or smart encoding modes
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HTML Entity Decoder

Encoding & Decoding

Decode HTML entities into readable text characters, supporting named entities, numeric codes, and hexadecimal values with comprehensive validation.
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JWT Decoder & Validator

Encoding & Decoding

Inspect JSON Web Tokens with instant header/payload decoding, signature awareness, claim validation, and security warnings — all in-browser.

Explore Data Converters

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JSON to CSV Converter

Data Converters

Convert JSON arrays and objects to CSV format with customizable delimiters, headers, and data handling options.
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CSV to JSON Converter

Data Converters

Convert CSV (Comma Separated Values) files to JSON format with advanced parsing options, data type detection, and flexible output structures.
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JSON to XML Converter

Data Converters

Convert JSON data to well-formed XML with customizable formatting, attribute handling, namespace support, and structure validation.
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XML to JSON Converter

Data Converters

Convert XML data to JSON format with customizable parsing options, attribute handling, namespace support, and intelligent structure conversion.
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JSON to TypeScript Interface

Data Converters

Convert JSON data to TypeScript interfaces and type definitions. Automatically infer types, handle nested objects, and generate clean TypeScript code.
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Markdown ↔ HTML Converter

Data Converters

Professional bidirectional Markdown ↔ HTML converter with comprehensive support for tables, task lists, nested lists, syntax highlighting, and complex HTML structures. True round-trip conversion preserving document structure and formatting.

Most Popular JSON Formatters & Data Conversion Tools

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting

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Base64 Encoder

Encode and decode Base64 strings for data transmission

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URL Encoder

Encode and decode URLs and query parameters safely

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JWT Decoder

Decode and verify JSON Web Tokens securely

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Developer Tool Categories - Formatters, Converters & Validators

Data Formatters & Validators

Format, validate, and beautify data in various formats

Data Converters

Convert data between different formats and structures

Encoding & Decoding

Encode and decode text in various formats

Text & String Tools

Manipulate and transform text and strings

Cryptography & Security

Hash, encrypt, and secure your data

Web Development

Tools for frontend and backend development

Color & Design

Work with colors, gradients, and design elements

Date & Time

Convert and calculate dates, times, and timezones

Number & Math

Mathematical calculations and number conversions

Network & API

Network utilities and API development tools

Generators & Creators

Generate content, data, and code automatically

Development Tools

Tools for software development and coding

Data Analysis

Analyze and process data files and content

Data Validators

Validate data formats, contacts, and input fields

Why Choose Our Free Data Formatting & Development Tools?

Instant Data Formatting Results

No loading screens, no sign-ups. Paste your JSON, XML, or CSV data and get formatted results instantly.

Smart Data Format Detection

Auto-detects JSON, XML, YAML, and other data formats to suggest the perfect formatting tool for your needs.

One-Click Actions

Copy, download, or share results with a single click. No extra steps.

Batch Data Processing Tools

Handle multiple JSON, XML, CSV files and data formats simultaneously for maximum developer productivity.

Keyboard Shortcuts

Power-user features with hotkeys for lightning-fast workflows.

Live Preview

See changes as you type with real-time validation and error highlighting.