SubtitlerAuto-subtitle any video
Transcribe, shape broadcast-ready captions, and export for Premiere and Avid — all in your browser.
Runs entirely in your browser. Your video never leaves this device. Best for short clips.
Long video? Use your own AI key for fast transcription.
- Create a free or low-cost account at a transcription AI provider (e.g. Groq or OpenAI).
- Generate an API key in their dashboard.
- Paste it below — it stays in your browser only.
- Load your video and run; the audio processes on their servers, so it's fast even for long files.
Privacy: In API mode the audio is sent to the provider you chose. In Local mode nothing leaves this device.
Not happy with the result? Try a different model above, or switch to API mode if you have a provider key. 🎚️
Preview only — styling is on-screen reference. Most NLEs restyle captions on import; SRT/Avid carry text & timing, VTT can carry position.
Segmentation settings
Re-segmenting rebuilds cues from the original transcript and discards manual cue edits.
Avid export uses the SubCap caption text format (in/out timecode + text per cue). Caption formats vary by version — verify the import in your Avid Media Composer. Exports are caption/text files, not a rendered video.
What is an automatic video subtitler?
An automatic subtitler turns the speech in a video into timed, on-screen captions. Subtitler transcribes your video with the same local Whisper engine as the Transcribe tool — free and private in your browser — then reshapes the transcript into broadcast-quality subtitle cues: short lines, two at most, split on natural phrase boundaries, with a reading-speed guard that flags cues that flash by too fast. You can edit every cue, preview the captions burned over the video with custom styling, and export ready-to-import files for Adobe Premiere Pro and Avid Media Composer, plus standard SRT and WebVTT. The video never leaves your device in Local mode.
How to use it
- Load a video (MP4, MOV, WebM), pick the language and your sequence frame rate and start timecode.
- Generate subtitles locally (free, private) or with your own API key for long clips, then edit, merge, split and retime the cues.
- Style the live preview, then export SRT, VTT, a Premiere-ready SRT, or an Avid SubCap caption file — all frame-accurate.
When editors use it
Subtitling a cut for review, delivering captions with a broadcast or social edit, prepping an SRT for Premiere, or building an Avid SubCap caption pass — without paying for a cloud service or uploading sensitive footage. Because the timecodes are frame-accurate at your project fps (drop-frame aware), the captions line up with your sequence when you import them into your NLE.
Frequently asked questions
How do I import subtitles into Premiere Pro?
Export the SRT (or the Premiere-labeled SRT), then in Premiere choose File ▸ Import, select the .srt, and Premiere creates a caption track you can drag onto your sequence and restyle. Timecodes are frame-accurate at the fps you chose.
How do I import subtitles into Avid Media Composer?
Export the Avid SubCap file (.txt). In Media Composer add a SubCap effect to a title track, open its Effect Editor and use Import to load the text file. Caption formats vary by Avid version — verify the import in your specific version.
Does my video upload anywhere?
No. In the default Local mode the video and audio are processed entirely in your browser and never leave your device. Only the optional API-key mode sends audio to the provider you choose, which is clearly flagged.
What languages does it support?
English, Spanish, or Auto-detect, using the same local Whisper engine as Transcribe. Forcing the language is more accurate than Auto.
Is it free?
Yes. The local engine is free with no sign-up. The optional API-key mode uses your own provider key and their pricing for fast processing of long clips.