Why add captions in the browser?
Burned-in captions are useful when you want the text to appear everywhere, without relying on a platform subtitle track.
Add captions to a video
Burn-in captions in your browser.
Drop your video here
or
MP4, MOV or WEBM · up to 500 MB on desktop, 150 MB on mobile
- 1Upload
- 2Remove audio
- 3Download
Your video stays on your device.
Add captions to a video use cases
When to caption a video before sharing
Caption short demos, testimonials, silent social clips, support videos, and clips where the key message needs to be visible immediately.
Browser processing vs upload-based tools
For one caption line, local processing is simpler than uploading to a full editor and exporting from a remote queue.
How it works
- 1
Upload
Drop your video: MP4, MOV or WEBM.
- 2
Write the caption
Pick the Caption preset for a readable translucent background.
- 3
Export
Download the captioned video.
FAQ
Are these real subtitles or burned-in?
Burned-in. The caption is baked into the video so it plays everywhere without a separate subtitle file.
Can I add multiple captions over time?
Not in MVP. It supports one static overlay; multi-segment captions are on the roadmap.
Is my video uploaded anywhere?
No. The file is processed locally in your browser using WebAssembly. Nothing leaves your device.
Which file formats are supported?
MP4, MOV, and WEBM up to 500 MB on desktop and 150 MB on mobile.
Is there a watermark?
No. The exported video is identical to your file with the requested change applied.