Burn in subtitles
Add subtitles to a video
In short
AutoSubtitles lets you add subtitles to any video online for free. Upload your clip, generate captions with AI, edit them, and export an MP4 with the subtitles burned in. Free to start with no signup; no software install required.
Overview
At a glance
| Best for | Burning captions into a finished video |
|---|---|
| Input formats | MP4, MOV, WebM |
| Output | MP4 with subtitles burned in |
| Also exports | SRT, VTT, TXT subtitle files |
| Install | None, runs in the browser |
| Price | Free to start |
Workflow
How it works
- 1
Upload your video
Drag in an MP4, MOV, or WebM file.
- 2
Generate subtitles
AI transcribes the audio so you do not type captions by hand.
- 3
Edit and style
Fix wording, tune timing, and choose how the subtitles look.
- 4
Export the video
Render an MP4 with the subtitles burned in, ready to publish.
Capabilities
Features
No manual typing
AI transcription writes the subtitles for you from the video audio.
Burned-in or sidecar
Hardcode subtitles into the video, or export an SRT, VTT, or TXT file instead.
Style to match
Pick fonts, colors, outlines, and position so subtitles fit your video.
Fast, browser-side rendering
Exports render in your browser, not on a server, so there is no upload and no render queue. Nothing to install.
Formats
Supported formats
| Video input | MP4, MOV, WebM |
|---|---|
| Burned-in output | MP4 |
| Subtitle file output | SRT, VTT, TXT |
Plans
Free vs Pro
Start free, upgrade only if you need more.
| Capability | Free | Pro |
|---|---|---|
| Burned-in subtitles (MP4) | Yes | Yes |
| Editable text and timing | Yes | Yes |
| Export captioned video | Yes | Yes |
| HD and 4K export | No | Yes |
| Animations and word highlights | No | Yes |
| AI translation | No | Yes |
| Custom fonts | No | Yes |
| SRT, VTT and TXT download | No | Yes |
| Saved style presets | No | Yes |
Use cases
Who it's for
YouTube creators
Publish videos with captions baked in for viewers who watch on mute.
Social editors
Burn captions into vertical clips so they show everywhere they are reposted.
Businesses
Caption demos, webinars, and ads so they are watchable without sound.
No account required, start in seconds
FAQ
Frequently asked questions
Q.How do I add subtitles to a video?
Upload your video to AutoSubtitles, generate captions with AI, edit the text and timing, then export an MP4 with the subtitles burned in. You can also download an SRT or VTT file instead.
Q.Can I add subtitles for free?
Yes. Generating, editing, and exporting subtitles is free with no signup. Pro adds HD and 4K export, animations, and more.
Q.What is the difference between burned-in and sidecar subtitles?
Burned-in (hardcoded) subtitles are part of the video image and always show. Sidecar files like SRT or VTT are separate files a player loads on top, which viewers can toggle on or off.
Q.Do I need to install anything?
No. AutoSubtitles runs entirely in your browser, so there is nothing to download or install.
Q.What formats can I upload?
You can upload MP4, MOV, WebM, and most common video formats.
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