Add the Chrome extension
Use the store page above and approve access to Netflix, YouTube, and Netflix subtitle files.
Chrome extension · Netflix and YouTube
Your first dual subtitle is a few clicks away.
Install Dubstack, choose the language you are learning and a translation, then open a captioned video.
Free to install. No account required for the core features.
Two-minute setup
Install once, then use the player normally.
Open Dubstack from the toolbar
Pin it if you like, then choose your learning and translation languages.
Play a captioned video
Netflix needs the subtitle tracks you choose. YouTube needs at least one caption track.
Turn on the in-player pill
Auto mode usually handles this. The pill lets you override Dubstack for one video without changing every tab.
What Chrome asks for
Access is limited to the places Dubstack works.
The extension does not request access to every website.
See the full plain-language breakdown on the security page and the exact disclosures in the privacy policy.
If nothing appears
Check the captions before the extension.
Make sure the video has captions and that your chosen language exists. On YouTube, videos with no caption track cannot be translated by Dubstack.
Open Dubstack and check the status line. If one track is missing, choose another available track. The player's normal captions should remain visible while Dubstack waits.
Still stuck? Visit Support and include the site, video language, and what the popup status says.