Is Subtitles Burner free?
Yes. It is free and runs entirely in your browser, with no account or watermark.
Does the video leave my browser?
No. The subtitle burn-in runs locally, so your video and subtitle files stay on your device.
Which subtitle formats work?
SRT and VTT subtitle files are supported.
Does this keep subtitles as a separate file?
No. It burns the captions permanently into the video, so they play everywhere without a separate track.
Can I adjust how the captions look or align?
Yes. You can set the caption size and apply a timing offset so the captions match the audio.
How do I burn subtitles into a video?
Load the video and the subtitle file, set the size and style, and export. The text is rendered into the frames themselves in your browser, with nothing uploaded.
What is the difference between burned-in and soft subtitles?
Burned-in subtitles are part of the picture and cannot be turned off. Soft subtitles are a separate track the viewer can enable. On social platforms, where video autoplays muted, burned-in is what actually gets read.
What font size should subtitles be?
The default of 28 reads on a phone, which is where most video is watched. Below about 20 the text disappears at thumbnail size.
Why are my subtitles hard to read?
Almost always because there is no background or outline behind the text. White subtitles over a bright scene are invisible, and that happens more often than people expect.
Can I remove the subtitles later?
No. Once they are burned into the frames they are part of the image. Keep a copy of the original video before you burn them in.