Pick a tool.
Make it happen.

Format, validate and minify JSON data.

Convert comma-separated data into JSON arrays.

Encode or decode Base64 text locally in your browser.

Encode and decode URL components safely.

Generate a SHA-256 digest from text using Web Crypto.

Convert Unix timestamps to readable dates and back.

Generate an MD5 digest for compatibility checks (not security).

Convert a JSON array of objects to CSV.

Encode and decode HTML entities.

Escape text for a JSON string or decode a JSON string.

Validate and pretty-print XML documents.

Remove comments and unnecessary whitespace from HTML.

Minify CSS by removing comments and redundant whitespace.

Inspect a URL and separate its components.

Test a regular expression against sample text.

Check CSV quoting and consistent row column counts.

Generate random UUID v4 identifiers.

Create a SHA-1 digest for compatibility use, not security.