Auto-Generate
Perfect Captions
in Seconds
Upload any video and let our AI transcribe, sync, and style captions automatically. Support for 50+ languages, speaker detection, and one-click export to SRT, VTT, or burned-in subtitles.
Trusted by creators and teams at
Everything you need for
flawless video captions
From automatic transcription to styled subtitle exports — our AI handles the heavy lifting so you can focus on creating.
50+ Languages
Automatically detect and transcribe speech in over 50 languages and dialects, including mixed-language content.
Speaker Detection
AI identifies different speakers and labels them automatically, making multi-person interviews and podcasts easy to follow.
Styled Captions
Choose from 20+ caption styles or create your own. Customize fonts, colors, backgrounds, and animations to match your brand.
Real-Time Sync
Frame-accurate timestamp alignment ensures captions appear exactly when words are spoken — no manual tweaking needed.
Multi-Format Export
Export as SRT, VTT, ASS, or burn captions directly into your video. Download subtitle files or get a fully captioned MP4.
Privacy First
Your videos are encrypted in transit and at rest. We never store or share your content. Process and delete on your terms.
Captions in three simple steps
No editing experience required. Upload, review, and export — that's it.
Upload Your Video
Drag and drop any video file — MP4, MOV, AVI, or WebM. We support resolutions up to 4K and files up to 10GB.
AI Transcribes & Syncs
Our engine processes your audio, detects speakers, and generates perfectly timed captions in under a minute for most videos.
Review & Export
Make quick edits in our inline editor, pick a style, and export. Download subtitle files or a fully captioned video ready to publish.
Loved by creators worldwide
Join thousands of video creators, educators, and marketers who save hours every week with CapSync.
"CapSync cut my captioning workflow from two hours to under five minutes. The speaker detection is incredibly accurate, even with background music playing."
"We use CapSync for all our course videos. The multi-language support means we can reach students globally without hiring separate transcription teams."
"The styled captions look professional right out of the box. I export directly to TikTok and Instagram Reels — the burned-in subtitles get way more engagement."
Simple plans that scale with you
Start free. Upgrade when you need more. No hidden fees, cancel anytime.
Free
Perfect for trying things out
- 3 videos per month
- Up to 10 minutes each
- 5 languages
- SRT & VTT export
- Basic caption styles
Pro
For serious creators and teams
- 50 videos per month
- Up to 2 hours each
- 50+ languages
- All export formats
- Speaker detection
- 20+ caption styles
- Priority processing
Enterprise
For studios and large teams
- Unlimited videos
- No length limits
- 50+ languages
- All export formats
- Custom caption styles
- API access
- Dedicated support
- SSO & team management
Frequently asked questions
Everything you need to know about CapSync. Can't find an answer? Reach out to our support team.
Our AI achieves 99.2% accuracy on clear English speech and 95%+ across all supported languages. Accuracy may vary with heavy accents, background noise, or overlapping speakers. You can always review and edit captions in our built-in editor before exporting.
We support MP4, MOV, AVI, WebM, and MKV files. Free plan users can upload videos up to 500MB, Pro users up to 5GB, and Enterprise users up to 10GB. Resolutions from 360p to 4K are all supported.
Absolutely. Every plan includes access to our inline caption editor. You can fix typos, adjust timing, merge or split caption blocks, and add speaker labels manually. Changes are reflected instantly in your preview.
No. Your videos are encrypted during upload and processing, and automatically deleted from our servers within 24 hours after you download your results. We never use your content to train our models or share it with third parties.
Live captioning is available on our Enterprise plan. It supports RTMP and WebRTC streams with less than 2 seconds of latency. Contact our sales team to set up live captioning for your broadcasts, webinars, or events.
Yes — our REST API is available on the Enterprise plan. You can programmatically upload videos, retrieve captions, manage styles, and integrate captioning into your CMS, video platform, or custom applications. Full documentation is provided upon signup.
Ready to caption your next video?
Join 50,000+ creators who save hours every week with AI-powered captions. Start free — no credit card required.
Free plan includes 3 videos/month. Upgrade anytime.