Epupp: Live Tamper your Web

by pez · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Make web pages you visit behave like you want them to with live tampering, or with userscripts, TamperMonkey style.

Users

142

+7 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#74K

#62K among extensions

Version

0.0.22

updated 19 Jul 2026

Users

monthly, 10 months

Latest, 16 Oct 2026: 142 usersMove the mouse over the chart for any month

Ratings count

monthly, 10 months

Latest, 16 Oct 2026: 3 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Epupp: Live Tamper your Web

Epupp lets you tamper with web pages, It has two modes of operation: 1. Live REPL connection from your editor to the web page, letting you inspect and modify the page on the fly, with or without the assistance of an AI agent. 2. Userscripts: Tampermonkey style. Saved scripts that you can run, automatically or manually, on pages you visit. The two form a powerful pair. The live REPL connection, while happily supporting one-off changes or data extractions, is also a very efficient and fun means to interactively develop userscripts.