Small, fast tools. No accounts, no ads, everything runs locally where possible — the store listing’s permissions are the whole story.
Two of these run right here: EPUB ↔ MOBI converter and Remove EXIF.
Modify request, response and CORS headers by rule. ModHeader import built in.
Read EPUB and FB2 right in a browser tab.
Identify any font on any page, on hover.
Any table on any page to clean CSV, one click.
Every Chrome settings page in one searchable panel.
Strip location and camera data before you share.
One-click e-book conversion from your toolbar.
Run real Python in a browser tab — offline, nothing installed.
Type á é ñ ü ç and other accented characters instantly.