Developer Tools

Format and pretty-print JSON data with customizable indentation.

Validate JSON syntax and highlight errors with line numbers.

Convert JSON arrays to CSV format for spreadsheet import.

Convert CSV data to JSON format with automatic header detection.

Encode text or binary data to Base64 format.

Percent-encode text for safe use in URLs and query strings.

Test regular expressions against sample text and see all matches highlighted.

Convert between Unix timestamps, ISO dates, and human-readable date formats.

Generate v4 UUIDs for use as unique identifiers in your applications.

Compare two blocks of text and highlight every addition and deletion side by side.

Convert numbers between binary, octal, decimal, and hexadecimal bases.

Convert colors between HEX, RGB, HSL, HSV, and CMYK. Includes tint/shade palette, WCAG contrast checker, and copy-ready CSS values.