Developer Tools

Compare two text files or code snippets and see the differences.

Format, validate, and minify JSON strings.

Decode JSON Web Tokens securely.

Test and visualize regular expressions with real-time matching.

Convert HTML to Markdown. Paste HTML and get clean Markdown output.

Convert Markdown to valid HTML instantly.

Live preview of Markdown as you type. No conversion, just preview.

Edit HTML/CSS/JS together and preview in a sandboxed iframe.

Generate a linear-gradient CSS string and color stops between two colors.

Edit CSS (and optional HTML) and preview it live.

Edit HTML and preview it instantly in a sandboxed iframe.

Run JavaScript and capture console.log/info/warn/error output.

Send HTTP requests from your browser and inspect JSON responses.

Run Python locally in your browser (Pyodide) and view stdout + globals.

Test JavaScript regex patterns, view matches/groups, and preview replacements.

Format SQL queries for readability (Postgres/MySQL/SQLite/T-SQL).

Parse SQL into an AST (JSON) for inspection and debugging.

Minify CSS code to reduce file size and improve performance.

Minify HTML code to reduce file size and improve load times.

Minify JavaScript code to reduce file size and improve load times.