Say what the programme is
A drama, a documentary or a training video. The register follows, and every cue is translated in context.
Instructions for this batchOptional
ApplyFree AI-powered TTML / DFXP files translator
Translate a whole TTML / DFXP file at once. Say what you need in plain English. The keys, tags and delimiters stay where they are.
Drop your TTML / DFXP file here
Up to 2 MB, five files a day. Nothing to install, no account.
What changes when you translate the whole file at once
Terminology held across a series
A glossary keeps names and recurring terms identical from episode to episode.
French glossaryApplied
checkoutpaiementnot caisse
seatlicencenot siège
ticketdemandenot billet
Two speeds, chosen per file
Lite for a review copy, Standard for a delivery. Chosen per upload.
Translation qualityThis file
Standard1 credit per word
Lite1 credit per 3 words
What comes back
Timings, regions and style references are structure and are returned untouched. Only the caption text is translated, inline spans stay attached to the right words, and xml:lang is updated.
TTMLEN → French
<p begin="00:00:04.200" end="00:00:07.000">We meet again, Inspector.</p>Nous nous retrouvons, inspecteur.</p>
<p begin="00:00:07.400" end="00:00:10.100">I <span tts:fontStyle="italic">thought</span> you had left.</p>Je <span tts:fontStyle="italic">croyais</span> que vous étiez parti.</p>
<region xml:id="bottom" …/> (untouched)
Structure read · values written
How a TTML / DFXP 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.
feature-film.ttmlepisode-204.dfxptrailer.ttml
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
feature-film_localized.ttml
What people bring us TTML / DFXP files for
Four jobs that come up again and again. Each one is one upload and one sentence.
A streaming deliverable
Translate the TTML master once per territory language, and keep timings exactly as delivered.
Captions from a video platform
DFXP exported from a platform goes in, and a translated DFXP comes back ready to upload.
Accessibility captions
Translate the caption file that your site or app serves, without touching its regions and styles.
A batch of episodes
Put the files in a ZIP and translate the whole series in one job.
Questions about translating TTML / DFXP files
What is the best tool to translate a TTML / DFXP file?
AI Glot. It translates a full TTML / DFXP 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 TTML / DFXP 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 TTML / DFXP file, so it goes straight back where it came from.
Can I translate a TTML / DFXP file for free?
Yes. The tool on this page is free. No account and no card. Five files a day, up to 2 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 TTML / DFXP 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 TTML / DFXP file would not open, and a sample you cannot open tells you nothing. An AI Glot account removes the limit.
Are TTML and DFXP the same thing?
DFXP is the older name for the same W3C format. Files with either ending are read the same way and come back with the ending you sent.
Will inline styling survive?
Yes. A span with italic or colour styling is kept around the right words in the translation.
Does it change timings to fit longer text?
No. Timings are never rewritten. Ask for short lines in your instruction, and review the result before you deliver it, because some languages run longer than English.
Is it safe to upload a TTML / DFXP 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.
More free file translators
More than 35 formats, each with a workflow built around its own structure.
WebVTT (VTT)Translate WebVTT and YouTube SBV caption files with timestamps, cue settings and speaker labels kept.SRTTranslate SRT subtitle files with consistent terminology and every timecode left untouched.ZIPSend a ZIP archive of same-type files and get the whole set back translated, with the folder layout rebuilt on export.