All tools/Burn subtitles into video in your browser
Burn subtitles into video in your browser
Add an existing SRT or VTT file to a video and export an MP4 with permanent captions. You need both files. This free tool does not transcribe speech or translate subtitles.
Latin captions work in-browser. Complex CJK fonts may render poorly — convert with the SRT tool and a desktop editor if needed.
How to use
- Select your video and subtitle fileChoose a local video (MP4 recommended) and an existing SRT or VTT file. You need both files; this tool does not generate captions from speech.
- Burn the captions into the pictureSelect Burn subtitles. The first run loads the processing engine, then renders captions in your browser. Keep the tab open and allow time for encoding.
- Download and check the MP4When processing succeeds, the MP4 download starts. Check subtitle timing, readable characters, caption placement, and audio before publishing.
FAQ
Can I convert an SRT file to MP4 without a video?
No. An SRT file contains text and timing, not video frames or audio. To add SRT to MP4, select your source video as well as the subtitle file.
Can viewers turn burned-in subtitles off?
No. Burned-in subtitles become part of the video image. A separate subtitle file or supported subtitle track can be switched on and off; this tool creates permanent captions instead.
Is this tool free, and are my files uploaded?
It is free to use without an account. The selected video and subtitles are processed locally in your browser, not uploaded for processing. The browser downloads the processing engine on first use.
Does it translate or automatically generate subtitles?
No. Supply an existing SRT or VTT file. Use the subtitle converter for format changes, or Studio for the supported video translation and dubbing workflow.
Can I change subtitle styling or use any language?
This free tool has no styling controls. Font coverage is limited, and complex CJK characters may not render correctly. Check a short sample first; use a desktop editor with the required fonts if characters are missing.
Why can subtitle burning fail?
Each selected file must be at most 200 MB. Browser memory, unsupported codecs, unavailable subtitle rendering, or missing fonts can prevent a usable export. Try a short MP4 first. If processing fails, keep the source files and use a compatible desktop editor.
Add SRT to MP4: permanent captions or a separate file?
Burn subtitles into video when the text must remain visible wherever the video plays. Keep a separate subtitle file when viewers need a choice of captions or languages.
| Option | What you get | Trade-off |
|---|---|---|
| Burned-in captions | Text rendered into the MP4 image | Always visible; cannot be switched off |
| Separate SRT or VTT | Caption text and timing alongside the video | Requires a player or platform that supports the file |
Check a short sample before publishing
- Start with a short MP4 and a simple subtitle file. Each selected file is limited to 200 MB; available browser memory also matters.
- Check the first and last captions, product names, numbers, and whether text covers the product.
- Check accented letters and non-Latin characters. Font coverage is limited; use a desktop editor if the output has missing characters.
- Listen to the export and check audio synchronization. Keep the original video and subtitles so you can correct and re-export.
No video yet? These two sample SRT cues are original example text, not an actual product video or a dubbing result. Pair them with a video of at least five seconds to try the workflow.
Choose your next step
Need a different subtitle format before adding captions?
Convert SRT, VTT, or TXT subtitlesNeed translated speech as well? Review video dubbing features and limits and check pricing before using Studio. The browser tool above is free; video localization is a separate workflow.
Need full video localization?
Choose a minute pack or monthly plan, then create a dubbed video with subtitles. Up to 90 seconds per source video.
Recast · One video. Every market.