Free AI Subtitle Translator

Translate an audio file into subtitles

Most subtitle translators only accept SRT files — leaving you to transcribe your audio in one tool, copy the SRT into another, and translate it there. This one handles both steps. Drop in your MP3, WAV, MP4 or other audio file, pick the target language, and the translator transcribes the speech with AI and translates each cue into your chosen language in a single step.

Source language is auto-detected, so you don't have to know what was spoken. The output is a standard SRT with timestamps synced to the original audio — drop it straight into YouTube, Premiere Pro, Final Cut Pro, DaVinci Resolve, or CapCut.

Works for common pairs like translating Japanese audio to English subtitles, Spanish audio to English subtitles, English audio to Spanish subtitles, and dozens more.

Translate an existing SRT file

Already have an .srt — from YouTube Studio, a transcription tool, or your editor? Upload it here and skip the transcription step. Each cue is translated into the target language while the timestamps stay byte-identical to the original, so the translated SRT drops back into your video already in sync.

Common SRT translation jobs we see: translate SRT file to English, translate SRT to Spanish, translate SRT to Arabic, and translating English SRTs into the local language for foreign markets. Any pair in the 60+ language list works.

AI subtitle translator vs Google Translate

Google Translate is a sentence-by-sentence machine translator — it translates each line in isolation and often picks wording that sounds stiff when read aloud as subtitles. An AI subtitle translator passes nearby cues together, so the model can pick phrasing that matches the speaker's tone and keeps pronoun references straight across cues.

Cue timings are preserved either way. The difference shows up in the text: spoken dialogue reads more naturally, idioms get sensible equivalents instead of literal word-by-word swaps, and names and brands stay intact.

Automatic subtitle translation — no manual editing

The translator runs automatically on every cue in your file. No line-by-line editing, no copy-pasting into Google Translate, no stitching the translated lines back into the original timing. You upload, pick the language, and the translated SRT downloads.

For longer files the translator processes cues in batches so the timing stays consistent — you'll see the progress bar tick through transcription (for audio input), translation, and packaging.

Subtitle translator for YouTube videos

YouTube's built-in auto-translation produces a single fixed translation that you can't edit or download. To add a clean, translated subtitle track to your video, export the original SRT from YouTube Studio (or generate one with our YouTube subtitle generator), upload it here, pick the target language, then upload the translated SRT back to YouTube as a second subtitle track.

Same flow works for translating any video's subtitles to English or any other language — extract the audio, upload it here, pick English as the target language, and download the translated SRT.

Free vs paid subtitle translators

Most "free" subtitle translators either watermark the output, cap you at a few minutes per file, or hide the translation behind a signup wall. The CaptionX subtitle translator is free with no account: 25 MB of audio per file or 5 MB of SRT, all 60+ languages, no watermark, no metered credits.

For editors who want translated captions generated inside Adobe Premiere Pro, the CaptionX extension does audio → translated styled captions directly in the timeline.