Developer Utilities & Code Formatters

Generate instant mock JSON endpoints for frontend testing.

Test and visualize regular expressions in real time.

Format messy SQL and estimate query cost.

Decode and inspect JSON Web Tokens locally — nothing leaves your browser.

Translate cron syntax into human-readable next-run dates.

Drag-and-drop builder that outputs production-ready CSS.

Generate tailored HTML starter files with CDN configs.

Interactive UI for complex git rebase and merge commands.

Live markdown previewer with PDF export.

Translate terminal cURL commands into JavaScript or Python.

Create beautiful, shareable code images with syntax highlighting.

Convert between XML and JSON instantly, right in your browser.

Generate TypeScript interfaces from JSON payloads.

Visualize complex GraphQL schemas dynamically.

Iframe-based viewport tester for any local or live URL.

Generate temporary webhooks to capture and inspect payloads.

Convert text to terminal-friendly ASCII art headers.

Compare two blocks of text or JSON side by side — privacy-first, no uploads.

Encode and decode Base64 and UTF-8 strings offline.

Deconstruct user agents into precise device and OS data.