Developer / code
12 tools in this category
Format, lint, and debug the formats you touch every day.
From JSON to SQL to webhooks, these tools mirror what you already do in your editor, but in a throwaway page you can hand to a PM or a friend without spinning up a repo. Client-side by default: your payload stays on-device.
Webhook tester, mock API, and markdown editors use short-lived server bins — perfect for local debugging, demos, and staging webhooks from Stripe or your own app.
Format, validate, and minify JSON with error hints.
Convert JSON to CSV, XML, or YAML and back.
Format or minify HTML.
Format or minify CSS.
Format or minify JavaScript.
Pretty-print SQL for PostgreSQL, MySQL, or SQLite.
Test regular expressions with live highlighting.
Build cron strings and preview next run times.
Create a temporary URL that captures incoming HTTP requests for debugging integrations.
Paste JSON, get a live API endpoint instantly. Supports custom status codes, methods, delay, and CORS.
Edit Markdown with live preview and export.
Create beautiful code images for sharing.