Developer Tools Online

Format and compare JSON, encode Base64, encode URLs — instant, private, browser-based. All operations execute client-side directly in your browser without transmitting your sensitive data to any remote server.

Available Developer Tools

• JSON Formatter

  Format, validate, beautify, and minify JSON data with syntax error highlighting.

• Base64 Encoder / Decoder

  Encode plain text into Base64 or decode Base64 strings back to readable text.

• URL Encoder / Decoder

  Encode and decode URLs, URI parameters, and special characters for web safety.

• JSON Compare

  Compare two JSON objects side-by-side and highlight added, removed, and modified keys.

• Text Compare

  Compare two text blocks or code snippets line-by-line with visual diff highlighting.