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Free Online Developer Tools

A practical toolbox for JSON formatting, SQL formatting, radix conversion, timestamp conversion, Cron parsing, color conversion, text diff and string utilities. Everything runs locally in your browser.

Open JSON Formatter Browse Tools
tools.json
{
  "tools": [
    "json-formatter",
    "radix-converter",
    "timestamp-converter",
    "cron-parser",
    "color-picker",
    "sql-formatter",
    "text-diff",
    "string-utils"
  ],
  "privacy": true
}

Common Tools

Open instantly · Keyboard friendly · Copy and download supported

JSON Formatter

Beautify, validate, minify and sort JSON with error location and JSONPath copy.

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Radix Converter

Convert binary, octal, decimal and hexadecimal values with batch-friendly options.

Open

Timestamp Converter

Convert Unix seconds or milliseconds to local time, UTC and ISO 8601.

Open

Cron Parser

Explain Cron fields and calculate upcoming execution times.

Open

Color Picker

Pick colors and convert HEX, RGB and HSL values with saved favorites.

Open

SQL Formatter

Beautify or minify SQL, change keyword case and copy the formatted result.

Open

Text Diff

Compare text, JSON and code with highlighted additions, removals and changes.

Open

String Tools

Escape JSON strings, encode or decode URLs, and clean text casing or whitespace.

Open

Local Processing

Your data stays in the browser, which is safer for private code and logs.

IDE-like Experience

Syntax highlighting, error hints, history and keyboard-friendly workflows.

Ready to Use

No login or setup required. Open a tool, paste content and copy the result.

Improve Your Daily Development Workflow

The most common developer utilities in one place.

Open JSON Formatter