Formattools

Free Online Developer Tools - Format, Convert, and Validate Your Code Instantly

JSON Tools

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JSON Formatter

Format and beautify JSON data with syntax highlighting and validation

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JSON Validator

Validate JSON syntax and get detailed error messages with line numbers

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JSON Minifier

Minify JSON by removing whitespace to reduce file size

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JSON to CSV

Convert JSON data to CSV format for spreadsheet applications

Formatters & Beautifiers

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XML Formatter

Format and beautify XML documents with proper indentation

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SQL Formatter

Format SQL queries with proper indentation and syntax highlighting

Encoders & Decoders

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Base64 Encoder/Decoder

Encode and decode Base64 strings for data transmission

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URL Encoder/Decoder

Encode and decode URL strings for safe web transmission

Data Converters

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JSON to YAML

Convert JSON data to YAML format for configuration files

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CSV to JSON

Convert CSV spreadsheet data to JSON format

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JSON to CSV

Convert JSON data to CSV format for spreadsheet applications

Generators

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UUID Generator

Generate UUID v4, v1, and GUID unique identifiers

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Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes

Developer Utilities

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Regex Tester

Test regular expressions with real-time matching and explanation

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Diff Checker

Compare text differences with highlighted changes

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YAML to JSON

Convert YAML configuration files to JSON format

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Color Converter

Convert colors between HEX, RGB, HSL formats

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Timestamp Converter

Convert Unix timestamps to dates and vice versa

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Markdown to HTML

Convert Markdown to HTML with live preview

More Encoders

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HTML Encoder/Decoder

Encode and decode HTML entities and special characters

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QR Code Generator

Generate QR codes for URLs, text, email, phone, WiFi

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100% Private

All processing happens in your browser. Data never leaves your device.

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Lightning Fast

Instant results with no server round-trips. Works offline too.

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Completely Free

No registration, no limits, no hidden costs. Use unlimited times.

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Multi-language

Available in 10+ languages for developers worldwide.