Developer tools

Small helpers for everyday development, entirely in your browser.

• QR code generator (SVG)

  Turns a link or text into a scalable QR code – in your browser.

  ● In your browser

• QR code generator (PNG)

  Turns a link or text into a QR code image – in your browser.

  ● In your browser

• Generate UUIDs

  Creates random version 4 UUIDs – as many as you need, in your browser.

  ● In your browser

• Unix timestamp converter

  Turns a Unix timestamp into a readable date, and back – in your browser.

  ● In your browser

• Explain a cron expression

  Says in plain words what a cron line means and when it runs next.

  ● In your browser

• Regex tester

  Shows what your pattern matches, with positions and capture groups.

  ● In your browser

• File hash (SHA-256)

  Calculates the SHA-256, SHA-1, SHA-384 or SHA-512 checksum of any file.

  ● In your browser

• Encode file as Base64

  Turns any file into Base64 text or a data URL for HTML, CSS and JSON.

  ● In your browser

• Decode Base64 to a file

  Turns Base64 text or a data URL back into the original file.

  ● In your browser

• JSON to TypeScript interfaces

  Generates TypeScript interfaces from a JSON sample, with optional fields and unions.

  ● In your browser

• Compare two text files

  Shows the differences between two text files as a unified diff or side by side.

  ● In your browser

• Placeholder image (SVG)

  Makes a sized placeholder as SVG – in your browser.

  ● In your browser

• Placeholder image (PNG)

  Makes a sized placeholder as PNG – in your browser.

  ● In your browser