F12

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

As of May 2026, F12 has 801 users and a 5.00/5 rating from 3 reviews in the Developer Tools category.

thef12app Developer Tools★ Featured

Chrome Web Store ↗.crx

Users+3.8%

801

801

Rating0%

5.00

3 reviews

Reviews0%

3

Version

2.0.4

Manifest V3

History

3 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	772	5.00	3	2.0.4
Apr 30, 2026	779	5.00	3	2.0.4
May 28, 2026	797	5.00	3	2.0.4
Now	801	5.00	3	2.0.4

Permissions & access

Permissions: None declared
Host access: None declared

Screenshots

F12 screenshot 1

F12 screenshot 2

F12 screenshot 3

F12 screenshot 4

F12 screenshot 5

About

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.

Technical

Version: 2.0.4
Manifest: V3
Size: 3.54MiB
Min Chrome: 88
Languages: 1
Featured: Yes

Metadata

ID: mbnakamgdofpbfjpibdmcmjonhoncbgf
Developer ID: uc578720d9ef8ae05f43d47b49d36dd5f
Developer Email: [email protected]
Created: Oct 4, 2021
Last Updated (Store): Dec 19, 2021
Last Scraped: May 28, 2026
Website: —
Support URL: —
Privacy Policy: —

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Data sourced from the Chrome Web Store · last verified May 28, 2026.