Convert spoken dialogue or burned-in video captions into frame-accurate SRT, VTT, ASS, and TXT subtitle files. Powered by multi-language AI speech recognition and optical character recognition across 40+ languages.
Whether your video has raw spoken audio or existing open captions baked into the video track, SubExtractor gives you the right AI engine for the job.
Ideal for raw recordings, YouTube videos, podcasts, lectures, and interviews without existing captions. Our speech recognition model transcribes spoken audio and segments lines into natural subtitle timing.
Ideal when a video already has hardcoded subtitles, bilingual text, or silent on-screen titles that audio transcription cannot capture. Select the caption box and let AI OCR rebuild the exact SRT file.
| Workflow | Best For | Input Source | Output Formats |
|---|---|---|---|
| AI Speech-to-Text (STT) | Un-captioned videos, interviews, lectures, podcasts | Audio stream inside MP4, MKV, MOV, MP3, WAV | SRT, VTT, ASS, TXT |
| AI Hardcoded Subtitle OCR | Videos with burned-in / open captions on screen | Rendered video frames (custom crop region) | SRT, ASS, TXT, PDF |
| Soft Track Demuxing | MKV / MP4 / Blu-ray SUP / DVD SUB+IDX streams | Embedded subtitle tracks or PGS/VobSub files | SRT, WebVTT, UTF-8 |
Drag and drop your MP4, MOV, MKV, or AVI file into the extraction workspace. No software installation required.
Select AI Speech-to-Text to transcribe spoken dialogue, or highlight the subtitle area on screen to extract hardcoded captions via OCR.
Proofread lines in our interactive timeline editor, translate into 40+ languages, and export clean SRT, VTT, ASS, or TXT files.
Generate and translate captions across English, Chinese, Japanese, Korean, Spanish, French, German, and more.
Frame-accurate timestamps ready for Premiere Pro, DaVinci Resolve, CapCut, YouTube, and Vimeo.
Use our free Subtitle Translator, SRT Cleaner, and Subtitle Merger.
Heavy GPU speech recognition and video OCR run in the cloud so your browser stays fast and responsive.
Upload your video (MP4, MKV, MOV, AVI, or WebM) to SubExtractor and choose the Speech-to-Text mode. Our AI audio transcription engine detects spoken dialogue, aligns word-level timestamps, and exports ready-to-use SRT, VTT, ASS, or TXT subtitle files.
Unlike audio-only subtitle generators that get confused by background music or noisy environments, SubExtractor also includes an AI Video OCR mode. You can draw a detection box over burned-in (hardcoded) captions to extract the exact on-screen text and timecodes.
You can upload MP4, MKV, MOV, WebM, AVI, MP3, WAV, and M4A files. Generated subtitles can be downloaded in SRT, WebVTT, ASS, plain TXT, or PDF formats, or refined immediately in our browser-based Subtitle Editor.
Yes. Once your SRT file is generated from video speech or OCR, you can open it in our AI Subtitle Translator to translate into 40+ languages—or merge original and translated tracks into bilingual subtitles.