Cloud caption apps need your footage on their servers. OpaCaptions never sees it. Animated, word-by-word captions, subtitles and transcripts are made entirely on your own PC, so your videos are never uploaded, stored or used to train anyone's AI.
Where does your video go?
Every cloud tool has to upload your video to caption it. Follow the journey and decide which one you'd trust with client work, patients or an unreleased launch.
The problem
Typing, timing and styling every line in an editor can take longer than shooting the video itself.
On a phone, a video without captions is a video without a message. Viewers decide in the first second.
Popular caption apps charge $15–$69 a month, with monthly credits and 2–5 minute limits on cheaper plans.
Client work under NDA, unreleased launches, students and patients, uploaded to a cloud you don't control, on terms that can change.
Pushing gigabytes of 4K footage through a slow connection, twice, for every single clip.
How it works
MP4, MOV, MKV, MP3, WAV and more, up to 2 GB. Landscape, vertical or audio-only.
Five animated looks, 17 languages, or translate any of them into English captions.
A burned-in MP4 ready for TikTok, Reels and Shorts, plus subtitle files for YouTube and your editor.
A 30-second clip takes about 10 seconds on an ordinary laptop in Fast mode. No graphics card needed.
Styles & options
Five caption styles, tuned for phone screens. Tap one to see it live, then choose accuracy, language and what you want back.
Fast for quick clips, Best for accents, noise and technical words.
English, Hindi, Urdu, Bengali, Arabic, Spanish, French and more.
A ready-to-post video plus subtitle files for YouTube, Premiere and CapCut.
Videos or audio up to 2 GB: landscape, vertical or podcast.
Phone videos get bigger captions above the app buttons; audio gets a clean background.
Find any moment by searching what was said, then download it in one click.
More styles are on the way. Studio owners get them first.
Why creators switch
The word being spoken lights up as it's said, the look that keeps people watching to the end.
No credits, no length limits. Caption a two-hour podcast if you want.
English, Hindi, Spanish, Arabic, Urdu, Bengali and more, or translate into English captions.
Phone videos get bigger captions placed clear of the like, comment and share buttons.
Subtitle files for YouTube, Premiere and CapCut, plus a transcript you can search.
Privacy
Cloud tools promise to protect your data. OpaCaptions doesn't need to promise: speech recognition and rendering run on your own processor, so there is nothing for us to store, share, leak or train on.
Turn on airplane mode, unplug the network cable, and caption a video. It still works, because nothing needs to leave your PC.
Your email and licence key, so we can send your download and updates. That's the whole list.
Built for sensitive footage
If you'd think twice before uploading it, caption it with OpaCaptions.
Client footage under NDA stays on your machine, with no extra processor to disclose.
Patient education and training videos where faces and voices must stay private.
Internal investigations, depositions and compliance training that can't touch the cloud.
Lectures and classroom recordings with students, including minors, on camera.
Protect sources and unpublished stories until the moment you choose to publish.
Unreleased launches and embargoed announcements never sit on someone else's server.
Because your footage is never sent to us or any AI provider, there's no third party processing your video. That makes NDA, GDPR and India's DPDP Act obligations simpler to meet. Always confirm with your own compliance team.
The difference
| OpaCaptions | Typical subscription apps | |
|---|---|---|
| Privacy | ||
| Your video is uploaded to their servers | Never | Every time |
| Stored by a third party | No | Per their retention policy |
| Could be used to improve their AI | No, never | Depends on their terms |
| Works in airplane mode | Yes | No |
| Value | ||
| Price | $49 once | $15–$69 every month |
| Videos per month | Unlimited | Monthly credits |
| Video length | No limit | 2–5 min on cheaper plans |
| Stops working if you stop paying | No, it's yours | Yes |
Subscription figures reflect typical published plans from popular caption tools in 2026.
Pricing
Every plan, including Free, is 100% local. Privacy isn't a premium feature.
Try it on your own PC.
$0
For creators who post every week.
$49$29one time
For agencies, teams and educators.
$99one time
One-time payment. Includes a year of updates. After that it keeps working forever; renew updates for $19/year if you like. 14-day money-back guarantee. Windows 10 & 11.
Early access
Join the list and we'll email you the download link and your early-bird price when OpaCaptions launches.
We'll only email you about OpaCaptions. Unsubscribe anytime. Privacy policy
FAQ
OpaCaptions is a Windows app that adds animated, word-by-word captions to videos and podcasts. It transcribes speech with OpenAI's Whisper AI and burns styled captions into an MP4, plus SRT, VTT and TXT files, entirely on your own PC. Nothing is uploaded, and it's a one-time purchase, not a subscription.
Use a captioning app that runs on your own computer. With OpaCaptions you drop in your video, pick a caption style and language, and export. Speech recognition and rendering both happen locally, so your footage never leaves your PC.
There's a free version with Fast accuracy, videos up to 3 minutes and a small watermark. Pro is a one-time $49 ($29 early-bird) and Studio is a one-time $99 for teams; in India, ₹1,999 (₹1,499 early-bird) and ₹3,999. Every plan includes a year of updates and keeps working forever after that.
Yes. Speech recognition (OpenAI's open-source Whisper model) and video rendering run on your own computer. Your videos, audio and transcripts are never uploaded to us or to any AI service. The internet is only used to download the speech model once and to activate your licence. Try it: switch on airplane mode and caption a video.
No, and we couldn't if we wanted to. Your videos never reach us. The AI model runs on your PC and doesn't send anything back.
Your email address and licence key, so we can deliver your download, updates and receipts. Activating a licence sends your key and an anonymous device ID. Nothing about your videos, transcripts or file names is ever collected.
Because your footage is processed only on your own computer, no third party (including us) handles it. That removes a data processor from the picture and makes compliance simpler. Compliance depends on your whole workflow, though, so please confirm with your own legal or compliance team.
No. It runs on an ordinary Windows 10 or 11 laptop with 8 GB of RAM, no graphics card required. We built and tested it on an 8th-gen Intel Core i5 laptop. Faster PCs simply finish sooner.
On clear speech it gets almost every word right. Use Balanced or Best for accents, background noise or technical vocabulary. You also get a full transcript to review.
17 languages including English, Hindi, Urdu, Bengali, Arabic, Spanish, French, German, Portuguese, Chinese, Japanese and Korean, plus auto-detect. You can also translate speech into English captions.
Nothing stops. Your copy keeps working forever. The first year of new versions is included; after that you can renew updates if you want the latest features.
Windows comes first. A Mac version is on the roadmap. Join early access and tell us you're on Mac.
We're in early access now. Join the list to get the download link first and lock in the early-bird price.
Opa! is the Greek cry of joy, and it's exactly how captioning should feel. No timelines, no typing, no fiddly settings: drop in your video, pick a style, and watch every word come alive. Three clicks, and the hard part is done for you. That little burst of joy when you hit export? That's our logo, with one word lit up in yellow.