Best YouTube Translator Extensions 2026 — Compared

Six extensions promise to translate and dub YouTube videos. They differ far more than their store listings suggest — in what "free" actually means, in how many voices you get, and in whether they work outside YouTube at all. Below is a comparison built from each tool's public listing in August 2026, with the awkward parts left in.

Quick comparison

Figures come from each tool's Chrome Web Store listing or official site in August 2026 and can change. Check the listing before you rely on a number.

1. AI Video Dub — no daily cap

Our own extension, so treat the enthusiasm accordingly. What it does differently is refuse to count your videos: there is no daily quota, no card and no trial. Every one of the 50+ translation languages and all 400+ Microsoft Neural voices are on the free tier.

Practical extras: subtitles export as a standard SRT file, Video to Text gives you the whole transcript with clickable timecodes, and playback speed adapts to each subtitle segment so the voice does not drift out of sync on fast speakers.

The catch: YouTube only, Chrome only, and 3,000 users against 200,000 for the market leader. If you need Bilibili or Firefox, this is not your tool.

2. YouTube Dubbing — Translate & Dub — the biggest by far

With 200,000 users and 748 ratings it is the established option, and the breadth shows: it covers Bilibili, Udemy and Coursera as well as YouTube, and ships for Firefox and Android rather than Chrome alone. Premium adds multi-speaker detection, which assigns different voices to different people — genuinely useful for interviews and panel discussions — and preserves the original background audio.

The catch: the free tier stops at five videos a day. For a language learner working through a playlist that limit arrives quickly, and unlimited dubbing sits behind Premium.

3. livdub — any tab, your own API key

The most unusual model here. livdub dubs whatever is playing in the current browser tab, not just YouTube, and it is free because you bring your own Google Gemini API key. Your key stays on your device and requests go straight to Google, so nothing routes through livdub's servers. It has the highest rating of the group at 4.7 from 64 ratings.

The catch: you have to create a Gemini API key before anything works, and once you pass Gemini's free tier you are paying Google directly. That is fine if you are technical and unappealing if you are not.

4. AutoDub — dubbing plus bilingual subtitles

Covers 42 languages, states no account, no daily limit and no paywall, and shows bilingual subtitles alongside the dubbed audio, which suits people studying a language rather than just consuming content. It runs only inside the YouTube player.

The catch: it needs a caption track to work from, so videos with no captions at all cannot be dubbed, and live streams are not supported. User numbers are not published.

5. YouTube's own auto-translate — free and already there

Before installing anything, check whether YouTube's built-in translated captions are enough. Open the settings gear, choose Subtitles, then Auto-translate, and pick a language. It covers over 100 languages and costs nothing.

The catch: it is text only. There is no spoken voice, no way to download the translated text, and quality on technical or accented speech is inconsistent. If reading subtitles works for you, stop here and save yourself an install.

So which one should you install

• You watch several videos a day — a five-per-day cap will annoy you. Pick an unlimited option: AI Video Dub or AutoDub.
• You need more than YouTube — Bilibili, Udemy, Coursera or arbitrary tabs. YouTube Dubbing or livdub.
• You are on Firefox or Android — YouTube Dubbing is the only one of these that ships there.
• You dub interviews and panels — multi-speaker detection matters, and that is YouTube Dubbing Premium.
• You want subtitle files to keep — SRT export is AI Video Dub.
• You are comfortable with API keys — livdub gives you the widest reach for nothing.
• You just want to read along — YouTube's own auto-translate. Do not install anything.

Is any of this actually free

"Free" means four different things across this list, which is where most of the confusion comes from.

• Free with no limit — AI Video Dub and AutoDub. Nothing to pay, nothing to enter.
• Free up to a quota — YouTube Dubbing, five videos per day, then Premium.
• Free if you bring a key — livdub. Free within Gemini's free tier, then you pay Google.
• Free and built in — YouTube auto-translate, but captions only.

If you want the detail on what an unlimited free tier actually includes, we set it out on the free YouTube translator page.

Voice dubbing or subtitles

Subtitles are faster to skim and let you keep the original speaker's tone, which language learners usually want. Dubbing frees your eyes, which matters for tutorials where you are watching a screen rather than reading. Most people end up using both: dubbing for long lectures, subtitles for anything where the exact wording matters. Tools that offer only one of the two are limiting you unnecessarily — see the subtitle side for how the text workflow works.

Questions people ask

Can I run two of these at once? Install as many as you like, but run only one at a time on a video. Two dubbing tracks talk over each other.

Do any of them work without captions? Most need a caption track to translate from, including AutoDub and AI Video Dub. YouTube generates captions automatically for the large majority of videos, so this rarely blocks you in practice.

Do they work on live streams? Generally no. AutoDub states this explicitly, and live captions are unreliable enough that real-time dubbing on top of them tends to lag badly.

Which sounds most natural? Voice quality is subjective and depends on the language. Try two on the same video before deciding — it takes five minutes and settles the argument better than any review.

Related reading

• AI Video Dub vs YouTube Dubbing — head to head
• How to translate YouTube videos, step by step
• Dubbing or subtitles — which to use when