Feature
Generate accurate, timestamped subtitles from any video — SRT, VTT, burned-in MP4, or DOCX. Whisper AI detects the spoken language automatically across 100+ languages. Pay per minute, credits never expire.
check_circle1 credit per minutecheck_circleCredits never expirecheck_circleNo subscription required
Capto uses OpenAI Whisper — the most accurate automatic speech recognition model available — to generate frame-perfect subtitles from any video file. Upload an MP4, MOV, WebM, AVI, or MKV and receive a fully timestamped transcript in under two minutes, complete with word-level timestamps for karaoke-style highlighting. Whisper detects the spoken language automatically, supporting 100+ languages without any configuration. The resulting transcript is fully editable in Capto’s workspace before you export. Pay only for what you use: transcription costs 1 credit per minute, and credits never expire.
Anyone who produces video with spoken content — but these three groups use it most.
Lecture recordings and instructional videos become more accessible when every word is searchable and readable. Capto turns a 45-minute lecture into a timestamped transcript in roughly 2 minutes, ready to upload to your LMS as captions or export as a DOCX for students who prefer reading. SRT files slot directly into Teachable, Thinkific, and Kajabi without any reformatting.
85% of social video is watched without sound. Accurate, frame-timed captions keep viewers engaged and improve watch time — a direct ranking signal on YouTube. Capto's burned-in MP4 export bakes captions directly into the video file, so they appear automatically on Instagram Reels, TikTok, and X without requiring a separate subtitle track on each platform.
Podcast episodes on YouTube, Spotify Video, or your own site benefit from subtitle files for both SEO and accessibility. Capto's multi-speaker diarization labels each host and guest separately, making transcripts easier to read and repurpose for show notes. Export TXT or DOCX for your blog, or SRT to upload directly to the platform.
When you upload a video, Capto extracts the audio track and compresses it to a lightweight mono MP3 before sending it to Whisper in optimised segments. This keeps processing fast even for long videos — a 60-minute upload becomes roughly a 10 MB audio file. Whisper returns a timestamped transcript with timing down to the individual word. For multi-speaker content, enabling diarization routes the audio through an additional speaker-separation model before transcription, at a 1.5× credit multiplier.
The transcript lands in Capto’s workspace editor. Word-level timestamps power the karaoke-style subtitle preview — each word highlights as it’s spoken. Edit any segment inline, then export. The same corrected transcript drives every format: SRT for YouTube, VTT for your web player, burned-in MP4 for social platforms, DOCX for show notes.
OpenAI trained Whisper on 680,000 hours of multilingual audio — a dataset roughly 10× larger than competing open models. That scale gives it two meaningful advantages: it handles accented speech and technical vocabulary far better than most alternatives, and it identifies the spoken language from the audio itself rather than requiring you to declare it upfront.
Most speech-to-text services return segment-level timestamps — one timestamp per subtitle block. Whisper returns word-level timestamps, which is what powers Capto’s karaoke-style preview and makes burned-in MP4 exports look professional rather than mechanical. Words appear in sync with speech, not in chunks.
Cloud alternatives like Google Speech-to-Text and AWS Transcribe charge per second of audio on top of your own service fees. Capto bundles Whisper into the credit cost — 1 credit per minute of video, nothing extra for transcription.
Whisper identifies the spoken language from the audio with no manual selection required. After transcription, you can translate subtitles into 60+ target languages — including Spanish, French, Arabic, Japanese, Hindi, German, Portuguese, Korean, Italian, Russian, and Chinese — with four tone presets.
All plans accept the same video formats: MP4, MOV, WebM, AVI, and MKV. The differences between plans are file size cap, maximum video length per upload, and how many export jobs can run simultaneously. Credits are shared across all operations and never expire.
| Plan | Max file size | Max video length | Concurrent exports |
|---|---|---|---|
| Essential | 100 MB | 15 min | 1 |
| Creator | 500 MB | 60 min | 2 |
| Pro | 500 MB | 120 min | 3 |
| Growth | 2 GB | 4 hr | 5 |
Need longer videos or larger files? View all plans →
Capto uses OpenAI Whisper, which achieves 95%+ accuracy on clear, single-speaker audio — comparable to professional human transcription for most content. Accuracy drops in noisy environments or when speakers overlap. Enabling multi-speaker diarization separates overlapping speakers before transcribing, which helps. Every segment is editable in Capto's workspace so you can fix the rare error before exporting.
Yes. Capto's workspace lets you click any subtitle segment and edit the text inline. Changes apply immediately to every export format — SRT, VTT, TXT, DOCX, and burned-in MP4. You can also adjust start and end timestamps per segment. The video plays alongside the editor and jumps to the segment you're editing, so corrections take seconds rather than minutes.
Any common video container works: MP4 (H.264 or H.265), MOV, WebM, AVI, and MKV are all accepted. For subtitle output, Capto exports SRT (compatible with YouTube, Vimeo, and most video players), VTT (the HTML5 standard for browser-based players and LMS platforms), TXT (plain transcript without timestamps), DOCX (formatted Word document for show notes), and burned-in MP4 (captions permanently embedded in the video frame). All formats are generated from the same workspace in one click.
Most videos are transcribed in under 2 minutes regardless of length. Capto extracts a compressed mono MP3 before sending audio to Whisper — a 30-minute video becomes roughly 5 MB rather than 500 MB. Videos with speaker diarization enabled may take up to 4 minutes. Processing time does not affect credit cost: you are charged 1 credit per minute of video duration, not per minute of processing time.
Yes — every new Capto account starts with 5 free credits (enough to transcribe a 5-minute video), no credit card required. That covers a short tutorial, podcast clip, or conference excerpt. Credit packs start at $4 for 120 credits (120 minutes of transcription). Credits never expire, so unused minutes carry forward indefinitely.
Yes. Whisper automatically detects the spoken language from the audio — no manual selection needed. It covers 100+ languages including Spanish, French, German, Japanese, Chinese, Arabic, Hindi, Portuguese, Korean, Italian, and Russian. After transcription, Capto's translation feature can produce subtitle files in 60+ target languages with four tone options: formal, casual, educational, and creative.
Every new account starts with 5 free minutes. No credit card required.
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