Merge PDFs
Combine any number of PDFs into one file, in the order you add them.
Split a PDF
Pull out a page range into its own PDF. Use numbers like 1-3, 5, 8-10.
Compress images
Shrink JPG/PNG/WebP files for the web. Resize by max width and dial in the quality.
Convert images
Move between JPG, PNG and WebP. WebP usually cuts file size by half with no visible loss.
Format & validate JSON
Pretty-print, minify, or find out exactly where the syntax error is.
Word & character count
Live counts plus a reading-time estimate at 200 words per minute.
Base64 encode & decode
Unicode-safe in both directions.
Password generator
Generated with crypto.getRandomValues — never Math.random.
Colour contrast checker
WCAG 2.1 contrast ratio — the check that decides whether text is actually readable.
The quick brown fox jumps over the lazy dog