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How to Translate YouTube Subtitles

By Clioos 团队

There are two separate jobs here, and no single tool does both. First, get the captions out of YouTube as an .srt file — YouTube Studio for your own videos, or yt-dlp where you have permission. Then translate that .srt file with Clioos Subtitle Translator. What Clioos cannot do is the first step: it cannot download a YouTube video or its subtitles directly, and any guide that says otherwise is wrong. This guide keeps the two steps separate and shows the translation step with a tested run.

At a glance

Clioos Subtitle Translator cannot download from YouTube. It translates an .srt or .vtt file you already have — that file comes from YouTube Studio or an external download step first.
Only download captions for videos you own or have permission to use. Downloading someone else's captions to republish them is a rights problem, not a technical one.
Translation preserves timing structurally: cue numbers and timestamps return unchanged, only cue text changes — verified in the tested run below.
Free tier: 10 minutes per email (one-time). SRT/VTT up to 2 MB, max 60 minutes of subtitle duration per job. Files are deleted within 1 hour.

Steps

Get the .srt first. Own video: YouTube Studio → Subtitles → select the track → download .srt. External route where you have permission: yt-dlp --write-subs --sub-lang en --sub-format srt --skip-download VIDEO_URL (add --write-auto-subs only if no manual captions exist).
Check the file before translating: it should be UTF-8 text with numbered cues, one timestamp line per cue (for example 00:00:01,000 --> 00:00:04,000), and a blank line between cues. Fix broken numbering first — translation cannot repair a malformed file.
Open https://clioos.com/subtitle-translator/ and upload the .srt (up to 2 MB, max 60 minutes). Enter your email for the free 10 minutes if you have not used them; no forced account signup is required.
Verify structure before reading the words: same cue count, same timestamps, no merged or split cues. Then proofread the text — names, numbers, and idioms first — and download the .srt immediately, since files disappear within 1 hour.
Re-upload in YouTube Studio as a new subtitle track, then spot-check in the actual player: players differ in how they wrap and display cues.

Worked example: the translation step (tested 2 November 2026)

Test method, disclosed honestly: this run used the subtitle service's own code on the server — its SRT parser, its machine-translation route, and its SRT writer — on a 3-cue English sample in the shape of a YouTube caption file, translating English to Spanish. It was not clicked through the online tool UI, and no account or payment was involved. The download step above was not run here: the sample was already an .srt, which is exactly the state the translator expects. The live tool's default translation route is a hosted LLM (the route run here is the service's no-key backup machine-translation route), so live wording may differ; the timing preservation below is what this test verifies.

Stage	Result
Input	3 cues parsed from SRT; cue 1: 00:00:01,000 --> 00:00:04,000; cue 2: 00:00:04,500 --> 00:00:08,000; cue 3: 00:00:08,500 --> 00:00:11,000
Translation time	0.95 seconds for all 3 cues (provider: google-web-translate, the service's backup MT route)
Output	Same 3 cue numbers, same 3 timestamp lines, text replaced: “Hola y bienvenido a este tutorial.” / “Hoy le mostraremos cómo guardar un archivo.” / “Por favor revise cada línea antes de publicarla.”
Timing check	Timing identical to the input, cue for cue — only the text lines differ
Billing on this sample	1 minute: last cue ends at 11 seconds, rounded up, minimum 1 minute

Note what this test does not show: it does not show how the translator handles long cues, multi-line cues, formatting tags, or a 60-minute file. Test those on your own material, on the free 10 minutes, before buying a pack.

What it can't do

It cannot download from YouTube: no video download, no caption download, no paste-a-YouTube-link translation. The .srt must reach the tool from YouTube Studio or an external step you run yourself.
It cannot fix a broken SRT: missing timestamps, unnumbered cues, or garbled encoding must be repaired before upload. Translation preserves structure; it does not invent it.
It cannot promise translation quality: no accuracy percentage, no platform-approval promise, and no claim that output is publication-ready without proofreading.
It cannot re-time your subtitles: if the original timing is wrong, translation returns the same wrong timing. Fix timing in a subtitle editor first.
File caps apply: SRT/VTT up to 2 MB, max 60 minutes of subtitle duration per job. Split longer files into separate jobs.
Files disappear within 1 hour: there is no later re-download. Save the translated .srt as soon as the job finishes.

Frequently asked questions

Can Clioos translate my YouTube video directly from its link?

No. Paste-a-link translation of a YouTube video or its captions is not something the tool does. Download the .srt first, then translate the file.

Do I need the video file, or just the captions?

Just the captions file (.srt). This guide's path translates existing captions; it does not transcribe audio.

Will the translated subtitles stay in sync?

Yes, structurally: cue numbers and timestamps return unchanged, and the tested run verified timing identical cue for cue. If the original timing was wrong, it stays wrong — fix it in an editor first.

Can I download someone else's YouTube captions and translate them?

Technically you may be able to get the file, but republishing someone else's captions without permission is a rights problem. Only do this for videos you own or have permission to use.