Video generation
OpenCaptions
Free, open-source video captions you control
- 0community votes
- 0DR by Ahrefs no change since last check
- 2026founded
Ahrefs Domain Rating signal 13 Nov 2026, signal shifted 10 Nov 2026.
Free, open-source software that adds animated, word-by-word captions to videos, with transcription, styling, and export options for iPhone, Mac, or self-hosted
What it is
OpenCaptions is free, open-source software that adds animated, word-by-word captions to videos. It transcribes speech using your choice of models (Whisper, Parakeet, or Apple Speech), lets you style and correct every caption, and exports captioned videos or subtitle files.
You can use it on your iPhone with transcription happening on the device, or self-host it on your own server using Docker. The same Rust engine draws captions in the browser, in the app, and on the server, so the preview and export are identical.
OpenCaptions includes an HTTP API for scripting and video pipelines, and integrates with Claude Code, Claude Desktop, Cursor and other MCP clients through the opencaptions package. It supports about 100 languages with Whisper, 25 European languages with Parakeet, and can export as MP4, WebM, ProRes, SRT, VTT, or JSON transcripts.
Systems
- Transcription with Whisper, Parakeet, or Apple Speech
- Word-by-word animated captions
- Caption styling and correction
- Export as MP4, WebM, ProRes, SRT, VTT or JSON
- iPhone app with on-device transcription
- Self-hosted Docker deployment
- HTTP API for scripts and pipelines
- Integration with Claude, Cursor and MCP clients
- Support for 13 interface languages
- GPU acceleration optional for faster transcription
Pricing
Pricing model: Freemium
Free app (1080p at 30 fps), Pro one-time purchase 14.99 €, self-hosting free
Want to see what OpenCaptions does next? Follow them for milestones, new products and stories by email.
OpenCaptions metrics
Signal readout for docs.opencaptions.app: Ahrefs Domain Rating and Majestic link signals, arrows for the change since the last scan.
- 0 Domain Rating no change since last check
- 0 Trust Flow no change since last check
- 0 Citation Flow no change since last check
- 0 Referring domains no change since last check
- 0 External backlinks no change since last check
Ahrefs Domain Rating signal 13 Nov 2026, signal shifted 10 Nov 2026. Majestic signal 10 Nov 2026, signal shifted 10 Nov 2026. Link signals from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
OpenCaptions domain signal
Show the signal details
Public RDAP record, last read 11 Nov 2026, 20:02 UTC.
- Domain age 1 month
- Registered
- Expires
- Registrar CloudFlare, Inc.
- DNSSEC Not signed
OpenCaptions post-launch signal
The record for OpenCaptions after its launch on Nexora Launch (10 November 2026), from the readings we keep.
- 0 Domain Rating (Ahrefs) no change since launch
at launch: 0 (10 Nov 2026); latest: 12 Nov 2026 - 0 Trust Flow (Majestic)
first measured 10 Nov 2026 - 0 Referring domains (Majestic)
first measured 10 Nov 2026
Day 2 since launch. Next receipt: day 30, 10 Dec 2026. A change here is a reading, not a claim about its cause; lots of things move these figures. Anything we do not measure is not shown.
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Quick answers
- What is OpenCaptions?
- OpenCaptions is free, open-source software that adds animated, word-by-word captions to videos. It transcribes speech with a model you choose (such as Whisper, Parakeet or Apple Speech), lets you style and correct every caption, and exports a captioned video or subtitle files. It runs on your iPhone and on your own server.
- Is it free?
- The code is free and open source, and hosting the web editor yourself costs nothing but your own hardware. The iPhone app is free to use, with an optional one-time Pro purchase and no subscription.
- Does it upload my videos?
- Not unless you choose to. On the iPhone the speech is transcribed on the device, and when you host OpenCaptions yourself your videos stay on your own server. There is no tracking and no analytics.
- How do I host it myself?
- With Docker: download one file, start it with a single command, and open the editor in your browser. A GPU is optional and makes transcription faster.
- Can I use it from a script or a pipeline?
- Yes. Everything the app does is an HTTP API, with API keys, and the opencaptions package puts it on the command line and in Claude, Cursor and other agents.
OpenCaptions has a free listing. The owner can unlock the full profile with a paid launch for $5:
- Founder story (locked)
- Milestones (locked)
- Demo video (locked)
- Dofollow website link (locked)
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