Target first.
The line you are learning stays on top.
A small Chrome extension for Netflix + YouTube
Watch in two languages. Stay in the scene.
Your learning language on top. A quiet translation underneath. Click the phrase when it still makes no sense.
Free. No account.
darle vueltas
to overthink it
Literally: keep turning it over.
No quiero darle más vueltas
I don't want to overthink it anymore
No new routine
Look it up.
Keep watching.
Click a word. Hover the blurred line. Press Alt-R to replay.
Translation second.
Blur it until you need it.
One-key replay.
Alt-R. No scrubbing.
Quiet on purpose
Most of the time,
do nothing.
Pick two languages. Press play.
DubstackOn this video
Learning
Spanish
Translation
English
Both tracks ready
Peek second.
Hide the familiar line until you need it.
Replay the line.
Alt-R. That is the whole trick.
Save the sentence.
Export later. If later happens.
Reliability
The boring priority:
keep it working.
Streaming sites change. Fixes stay public.
See the changelogPrivacy
Private by default.
Free features stay in Chrome. Premium sends only the phrase you ask about.
Read the policyPlans
Use it free.
Pay for the weird lines.
Premium is for idioms, grammar, and tone. Not basic subtitles.
Free
$0
Dual subtitles, phrase lookup, replay, blur, saved lines, and export.
Get DubstackPremium
$4/mo
Short notes for idioms, grammar, and tone. Translation fallback. Up to 150 explanations a day.
The honest version
What happens when captions get weird.
A bad subtitle track is still a bad subtitle track. Here is what Dubstack can fix, what it cannot, and what never gets paywalled.
What works
Will it work on every Netflix title and YouTube video?
Dubstack works on Netflix and YouTube in desktop Chrome. Netflix needs the language tracks you choose; YouTube can add a second language through auto-translate when it has at least one caption track. Availability varies by title and region.
What if a YouTube video has no captions at all?
Then Dubstack has nothing reliable to work from. Auto-generated captions count; a video with no captions does not. We do not invent a transcript and call it accurate.
Why do YouTube captions sometimes look wrong or arrive late?
Auto-captions are YouTube's transcript, mistakes and all. Dubstack uses the timing YouTube provides, but it cannot repair bad words or timestamps. Choose a human-made track in Tracks when one exists.
When it gets messy
Will Dubstack switch off my normal captions?
Not while it is waiting. Dubstack only hides the player's captions after its own lines are ready. Turn Dubstack off and the usual captions return; CC you enabled yourself is left alone.
What happens when Netflix or YouTube changes the player?
Streaming sites change without notice. If Dubstack cannot read a usable line, it leaves the site's captions alone rather than showing a blank screen. Fixes go in the public changelog.
It worked yesterday. What should I try first?
Run one subtitle extension at a time, then reload the video once. If it still fails, send the video link and your Chrome version; that is more useful than a screenshot of an empty player.
Will it cover the video with controls?
No. The player gets one small on/off pill. Size, width, top or bottom position, and translation blur live in the extension popup.
Plans and privacy
Is the free plan actually free?
Yes. No trial clock and no account. Dual subtitles, phrase lookup, Alt-R replay, translation blur, saved lines, and CSV or Anki export stay free. Premium adds AI explanations and translation fallback.
What happens after 150 Premium explanations?
The limit resets the next day. Subtitles and every free feature keep working. There are no overage charges or automatic top-ups.
What if Premium does not turn on after checkout?
Open Dubstack and click Check status. If this browser was not matched automatically, use your payment email to recover access. There is no license key or API key to paste.
What can Dubstack see?
Site access is limited to Netflix, YouTube, and the subtitle files they use; Dubstack does not request access to every website. Free features stay in Chrome. A Premium explanation sends only the selected phrase, nearby subtitle line, and language pair. Read the privacy policy.
Can I cancel without losing the free version?
Yes. Cancel Premium whenever you like; free features remain. Refund requests within 14 days are covered by the refund policy.