Developer

Generate universally unique identifiers (UUIDs) in v1 or v4 format.

Encode text to Base64 or decode a Base64 string back to text, processed in memory and never stored.

Format, validate, and minify JSON, processed in memory and never stored.

Encode text for safe use in a URL, or decode a percent-encoded URL back to plain text, processed in memory and never stored.

Encode text to HTML entities or decode HTML entities back to plain text, processed in memory and never stored.

Decode a JSON Web Token and view its header and payload claims, processed in memory and never stored.

Test a regular expression against a string and see every match, capture group, and named group, processed in memory and never stored.

Parse a cron expression and see the next run times in plain UTC dates, computed in memory and never stored.

Calculate network address, broadcast address, usable host range, and host count for an IPv4 subnet. Processed in memory and never stored.

Convert Markdown to HTML. Paste your text — processed in memory and never stored. The HTML is returned as text, not rendered by this site.

Format and beautify JavaScript, TypeScript, CSS, SCSS, HTML, JSON, Markdown, and YAML. Paste your code — processed in memory and never stored.