Developer tools that just work.

Write Markdown, export a styled PDF.

Write HTML, CSS, and JS with an instant preview.

Format, validate, minify, and diff JSON.

Convert text and files to and from Base64.

Test patterns with live match highlighting.

Encode, decode, and edit URLs and query strings.

Inspect headers, payloads, and expiry of any JWT.

Beautify and minify SQL for any dialect.

Convert epoch timestamps to dates and back.

MD5, SHA-1, SHA-256, SHA-512 from text or files.

Turn JSON into TypeScript interfaces or types.

Generate UUID v4, v7, or ULID identifiers in bulk.

Compare two pieces of text and see exactly what changed.

Strong, cryptographically random passwords — never leave your device.

Turn URLs, Wi-Fi logins, contacts, and more into PNG or SVG QR codes.

Pixel-perfect raster output at any size, with quality slider and clipboard copy.

Convert between HTML and Markdown.

Convert HEX, RGB, HSL, OKLCH, and generate palettes.

Build cron expressions visually with explanations.