Subtitle Translator

Subtitle Translator (SRT & VTT)

Translate a subtitle file into several languages in one run. Paste in an SRT or VTT, or hand it a video URL to transcribe first, choose your target languages, and get back clean translated SRT and VTT with the original timings untouched. Built for localization and accessibility work where you need the same captions in five languages without re-doing the timing by hand.

$0.05 per language, plus $0.00005 each time a run starts. Flat rate — no volume tiers, no plan gates. The charge is per dataset row, and the actor writes exactly one row per target language, including in the labelled sample mode you get without a key.

How it works

It parses your input into cues, sends the text (not the timestamps) to an AI model for translation, and re-emits each cue with its original start/end times. If you pass a videoUrl instead of subtitle text, it transcribes the audio first and then translates the result.

Input

Provide either subtitles or videoUrl, not both. targetLanguages is the only field you always have to set.

Output

One dataset row per target language, plus the files themselves in the run's key-value store.

Original cue timings are preserved exactly — only the text is sent to the model, never the timestamps — so the output drops straight back into your player or editor.

Example

{
  "subtitles": "1\n00:00:01,000 --> 00:00:04,000\nHello, welcome to the show.\n",
  "targetLanguages": ["es", "fr", "de"],
  "outputFormat": "both"
}

Pricing

Cost scales with languages, not with file length: translating one subtitle file into five languages costs $0.25 whether the file is two minutes or two hours.

Because the charge is per dataset row, the same is true of the demo. A run with no openaiApiKey, or with neither subtitles nor videoUrl, returns labelled _sample rows — one per language in targetLanguages — and each of those is charged $0.05 like a real one. Asking for five languages without a key therefore costs $0.25, not nothing. Trim targetLanguages to a single code while you are wiring things up.

Your OpenAI usage is billed separately by OpenAI on your own key, and covers the translation model plus Whisper if you passed a videoUrl.

Notes

Translation quality tracks the underlying model, so long idioms and very domain-specific terms may need a human pass. Transcribing from a videoUrl adds time and depends on the audio being clear; if you already have accurate captions, pasting the subtitle text directly is faster and more reliable.