Say what the video is, in a sentence
A lecture, a product demo or an interview. The register follows, and every cue is translated in the context of its neighbours.
Instructions for this batchOptional
ApplyFree AI-powered WebVTT (VTT) files translator
Translate a whole WebVTT (VTT) file at once. Say what you need in plain English. The keys, tags and delimiters stay where they are.
Drop your WebVTT (VTT) file here
Up to 10 MB, five files a day. Nothing to install, no account.
What changes when you translate the whole file at once
Names and terms stay consistent
A glossary keeps speaker names and product terms identical from the first cue to the last, and across a whole course.
French glossaryApplied
checkoutpaiementnot caisse
seatlicencenot siège
ticketdemandenot billet
Two speeds, chosen per file
Lite for internal recordings, Standard for the video customers watch. Chosen per upload.
Translation qualityThis file
Standard1 credit per word
Lite1 credit per 3 words
What comes back
Timestamps and cue settings are never rewritten. Only the spoken text is translated, and speaker labels and italics stay attached to the right words, so the captions play in sync.
VTTEN → French
WEBVTT
00:00:04.200 --> 00:00:07.000
<v Maria>Welcome to the first lesson.Bienvenue dans la première leçon.
00:00:07.400 --> 00:00:10.100
<v Maria>Let's start with the basics.Commençons par les bases.
Structure read · values written
How a WebVTT (VTT) translation runs
1. Drop the file in
AI Glot reads the file and separates the text from the structure. It then tells you how much there is to translate, before anything runs.
webinar-captions.vttlesson-04.vttyoutube-captions.sbv
2. Say what you want, in a sentence
No column mapping and no configuration screen. Write what you need, then read the plan it produced. If it misread you, say so and it plans again.
How to translate this file?
Translate into German and Spanish. Keep product names in English, use our glossary, and make the copy sound natural for e-commerce.
Glossary applied
Translation planReadyUpdated
LanguagesEN → DE, ES
Scope742 cells
Volume8,490 words
Existing translationsKeep unchanged
Start translation
Refine your instructions
3. Get the same file back
One file comes back, translated. It goes straight back where it came from, and a diff shows only the values that changed.
fr-FR
de-DE
es-ES
ja-JP
webinar-captions_localized.vtt
What people bring us WebVTT (VTT) files for
Four jobs that come up again and again. Each one is one upload and one sentence.
Captions for an online course
Translate every lesson's VTT with one glossary, so terminology matches across the whole course.
Web video in several languages
Run the file once per language and add each result as a <track> element.
YouTube captions
Export the SBV file from YouTube Studio, translate it, and upload the result as a new language.
Webinars and recorded calls
Speaker labels such as <v Maria> are kept, so it is still clear who is talking.
Questions about translating WebVTT (VTT) files
What is the best tool to translate a WebVTT (VTT) file?
AI Glot. It translates a full WebVTT (VTT) file in one job, at a quality you can steer with a glossary and a plain-English brief. You describe what you need. You do not map fields or split the file. The tool on this page runs it with no account.
How do I translate a WebVTT (VTT) file without breaking it?
Use a tool that reads the format instead of the raw text. Upload the file above and say what to translate. Read the plan, then run it. AI Glot returns one valid WebVTT (VTT) file, so it goes straight back where it came from.
Can I translate a WebVTT (VTT) file for free?
Yes. The tool on this page is free. No account and no card. Five files a day, up to 10 MB each, and up to 5,000 words translated per file. Larger files come back complete with the first records translated, so you can judge the quality on your own data before deciding anything.
What happens if my WebVTT (VTT) file is bigger than the free limit?
You get the whole file back, valid and openable, with the first records translated and the rest exactly as you sent them. It is deliberately not truncated: a cut-off WebVTT (VTT) file would not open, and a sample you cannot open tells you nothing. An AI Glot account removes the limit.
Does it work for YouTube subtitles?
Yes. YouTube exports captions as .sbv, and that format is read on this page as well. Translate it and upload the result as a new language.
Will the lines still fit on screen?
The timing is never changed. Ask for short lines in your instruction and skim the result, because some languages run longer than English and can need a line break here and there.
What about NOTE and STYLE blocks?
They are kept as written. Only the text of the cues is translated.
Is it safe to upload a WebVTT (VTT) file to an online translator?
AI Glot keeps the file only as long as the translation needs it. The download link expires after an hour. The file is deleted afterwards. Nothing you upload is used to train any model. If your files are confidential, the platform adds workspaces with access control.
What do I get with an AI Glot account?
No size limit and no daily limit. Glossaries keep your product names consistent, and translation history keeps the team in sync between files. More than 35 formats share one workspace, and an API, a CLI and an MCP server put the same engine in your own pipeline.
Related use cases
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