Free Developer Utility Tools

Fast, free, no sign-up. Every tool runs entirely in your browser — nothing you paste here ever leaves your machine.

• JSON Formatter

  Pretty-print, validate, and minify JSON with syntax highlighting and clear error messages.

• Regex Tester

  Test regular expressions with live match highlighting, capture groups, and common presets.

• UUID Generator

  Generate cryptographically secure UUID v4 identifiers, one at a time or in batches.

• Base64 Encoder / Decoder

  Encode text to Base64 and decode it back, with full UTF-8 support for any language.

• Cron Parser

  Translate cron expressions into plain English and preview the next scheduled run times.