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A quick way to understand who this helps, what it solves, and where it connects next.
People preparing app promos, product demos, social clips, and tutorial videos with permanent captions
Adding burned-in captions without opening a timeline editor
Capture subtitle-burn intent with a compact browser-first video utility
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
To burn subtitles, load one video and one matching SRT or VTT file, adjust the caption size and timing offset if needed, then export a captioned MP4. The processing runs in your browser, so the video and subtitles stay on your device and are never uploaded.
The size control keeps captions readable on small screens, and the offset control nudges timing so captions line up with the audio. Once exported, the captions are part of the video frames rather than a separate track.
Burned-in captions matter for social posts, marketplace listings, and promo clips where sidecar subtitle files are not practical or simply not supported. Because the text is baked into the video, viewers see it automatically with no need to enable captions.
This is different from a separate subtitle track, which can be ignored, mistimed, or stripped during re-uploads. Burn-in guarantees the captions always appear exactly as you styled them.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is free and runs entirely in your browser, with no account or watermark.
No. The subtitle burn-in runs locally, so your video and subtitle files stay on your device.
SRT and VTT subtitle files are supported.
No. It burns the captions permanently into the video, so they play everywhere without a separate track.
Yes. You can set the caption size and apply a timing offset so the captions match the audio.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Load one video, attach a subtitle file, and export a permanent MP4 with captions baked in.