No accounts, no ads, everything runs locally where possible. Extensions and web tools from one verified publisher.
Convert e-books both ways from the toolbar — EPUB for Send to Kindle, MOBI for sideload.
About the converter →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.
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.