F12

by Chamy Software · Developer Tools

FeaturedManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

A chrome extension to help a developer's life tab bit easier

Users

874

+67 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#34K

#28K among extensions

Version

2.0.4

updated 19 Dec 2021

Users

monthly, 3 years

Latest, 15 Oct 2026: 874 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 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 F12

F12 is an all in one developer toolbox. It tries to give you all the tools that you need as a developer. We currently have: Unix time converter + timezone converter, JWT Decoder, Base64 Encoder / Decoder, URL Inspector / Constructor, KeyCode Finder and JSON Formatter. We're working on adding more tools in near future. Our aim is to provide a safe set of tools where your sensitive data doesn't leave your browser. You don't have to paste your JWT into that fishy website ever again.