OPFS Explorer

by Thomas Steiner · tomayac.com · Developer Tools

FeaturedEstablished publisherManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

OPFS Explorer is a Chrome DevTools extension that allows you to explore the Origin Private File System (OPFS) of a web application.

Users

10K

0 in 30 days

Rating

4.2 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#8,927

#7,635 among extensions

Version

1.11.0

updated 7 Jul 2026

Users

monthly, 3 years

Latest, 15 Oct 2026: 10,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 Oct 2026: 18 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 OPFS Explorer

OPFS Explorer is a Chrome DevTools extension that allows you to explore the Origin Private File System (OPFS, https://fs.spec.whatwg.org/) of a web application. To use it, open Chrome DevTools and click on the OPFS Explorer tab. The extension will automatically analyze the OPFS of the current web application and display the file hierarchy. You can then click on any file to download its contents or delete the file (which may fail if the file is locked). Note that deleting files may cause the application to break. You can test the extension on the demo page (https://tomayac.github.io/opfs-explorer/). The source code is on GitHub (https://github.com/tomayac/opfs-explorer).