Synthesia's dubbing tool that translates any uploaded clip or public YouTube link into 140+ languages — cloning each speaker's voice and re-syncing their lips.
Last verified · 2026-09-23 · by Moe Ameen
The Synthesia AI Video Translator is the dubbing feature of Synthesia's avatar-video platform, and its defining trait is that it works on footage you didn't make in Synthesia. You upload an MP4, MOV, or WEBM file — or paste a public YouTube URL — and it transcribes the audio, translates the script, clones the on-screen voices, and re-renders the video with the lips re-synced to the new-language audio. Most AI video tools only localize material created inside their own editor; this one dubs real footage shot on a camera, cut in another editor, or pulled from YouTube.
The workflow is built to remove the usual dubbing friction. It covers 140+ languages and regional variants and can generate every requested version in a single pass rather than one job per language. It detects and clones multiple speakers automatically with no manual voice assignment, keeps each dubbed voice matched to the correct on-screen speaker across cuts, and offers Adaptive lip-sync (adjusts speech speed to fit the language) or Original (preserves source pacing). The voice clone captures tone, emotion, and pacing so a speaker sounds like themselves in every language, or you can swap in a stock voice.
Subtitles are auto-generated for each dubbed version and viewers can toggle them in Synthesia's Multilingual Player. A free tier translates a first minute of video with full functionality; paid Synthesia plans lift the limits, add languages and bulk translation, and remove the watermark. It is one feature inside the broader avatar studio, so it produces dubbed video assets — it does not distribute them.
Think of the translator as a multiplier: one flagship video becomes N language versions. The catch is that N dubbed files is not N content presences — each market still needs its own steady stream of posts, and re-cutting every language by hand is exactly the work the multiplier was supposed to save. Kompozy is the pipeline that turns each dub into a market's posting engine. Bring a dubbed export in as source and Kompozy clips the long video into vertical shorts, auto-captions them in the dubbed language, and reframes each cut for TikTok, Reels, and Shorts — then generates net-new formats the translator can't touch, spinning the same source into Text Posts, Carousel Posts, a Blog Article, and an Email Newsletter for that language.
The result is repeatable per market: dub once in Synthesia, then run that file through Kompozy to produce a week of localized, on-brand content and let autopilot schedule and publish it across the eight social platforms plus blog and email, gated by a per-post review so you approve each language before it ships. Ten dubs stop being ten uploads and become ten market-specific content calendars.
Yes. You can upload an MP4, MOV, or WEBM file or paste a public YouTube link. It transcribes, translates, clones the speakers' voices, and re-syncs the lips — the video does not need to have been made in Synthesia.
Synthesia says the translator covers 140+ languages and regional variants and can generate every requested version in a single pass instead of running a separate job per language.
Yes. The clone captures tone, emotion, and pacing so the speaker sounds like themselves in the target language, and it clones multiple speakers automatically. You can also substitute a stock voice.
Yes — a free tier translates a first minute of video with full functionality and a watermark. Paid Synthesia plans raise the limits, add languages and bulk translation, and remove the watermark.
The translator produces a dubbed file but doesn't distribute it. Kompozy takes each dub and clips it into captioned vertical shorts, reframes per platform, generates other formats from the same source, and schedules and publishes them across nine platforms.