YouTube Browser Extension

See when you subscribed to any YouTube channel.

A small badge that appears next to YouTube's subscribe button with your exact subscription date and tenure.

Read-only access No external servers Lightweight
youtube.com
TED-Ed channel — subscribed since March 26, 2017 (9Y)
Mark Rober channel — subscribed since May 2, 2020 (2Y)
Vox channel — subscribed since March 22, 2020 (6Y)
Crash Course channel — subscribed since November 12, 2017 (8Y)
WIRED channel — subscribed since December 27, 2022 (2Y)

How it works

Three simple steps.

5Y
Subscribed sinceJune 23, 2020
  1. 01

    Install & sign in

    Add the extension to Chrome or Firefox and sign in with Google.

  2. 02

    It syncs your subs

    Your subscriptions are fetched once and cached securely in local browser storage.

  3. 03

    Visit a channel

    The badge appears next to the subscribe button with your tenure and exact date.

Privacy

Your subscriptions never leave your browser.

I built Subscribed Since to be the kind of extension I'd trust myself. Minimal permissions, no server, no tracking.

Read the full privacy policy →
  • Read-only YouTube scope. The extension cannot subscribe, unsubscribe, or change anything in your YouTube account.
  • Subscription data is stored only in your browser's local extension storage.
  • No analytics, no database, no custom backend. Everything is on your device.
  • Sign out any time to wipe the local cache and revoke the cached token.

FAQ

In Case You're Wondering

Which browsers are supported?
Chromium-based browsers, and Firefox.
What languages are supported?
Just English for now, with additional languages coming soon.
Does it work on every channel page?
Yes — across @handles, /channel/, /c/, and /user/ URLs, and across YouTube's current and older header layouts.
What does the tenure format mean?
If you've been subscribed for at least a year, it shows years (e.g. 4Y). Otherwise months (6M), or days (9D).
How fresh is the data?
Your subscriptions auto-refresh every 6 hours, and again shortly after you subscribe or unsubscribe. You can also manually refresh the data from the extension pop-up menu.
Is Subscribed Since open source?
Yes, it is! If you find a bug or have any ideas for improvements, feel free to open an issue or pull request on GitHub.