Build Tools

Format and pretty-print JSON instantly.

Validate JSON and find parsing errors.

Encode text to Base64 or decode Base64 back to text.

Encode text as Base64 in your browser with optional line wrapping.

Decode Base64 text into readable text or bytes in your browser.

Decode Base64 text or uploaded files into readable text or bytes in your browser.

Encode text as Base32 in your browser with optional line wrapping.

Encode typed text or uploaded files as Base32 in your browser.

Decode Base32 text or uploaded files into readable text or bytes in your browser.

Encode text into BASE-58 output in your browser.

Encode typed text or uploaded files as BASE-58 in your browser.

Decode BASE-58 text into readable text or bytes in your browser.

Decode BASE-58 text or uploaded files into readable text or bytes in your browser.

Encode and decode URL-safe strings.

Generate random UUID v4 values.

Convert Unix timestamps to readable dates.

Remove unnecessary whitespace and comments from CSS.

Lightweight JavaScript whitespace and comment minifier.

Test regular expressions against sample text.

Decode JSON Web Token headers and payloads in your browser.

Build cron expressions from friendly schedule fields and presets.

Generate MD5 hashes from text in your browser.

Generate SHA-1 hashes from text in your browser.

Generate SHA-256 hashes from text in your browser.

Estimate AI input tokens, output tokens, context fit, and approximate model cost before sending a prompt.