🔥 Format-specific subtitle burner guides

Burn subtitles by format

Pick your input format. We hardcode the captions and give you a finished video — entirely in your browser, no upload, no watermark.

SRT → MP4

Burn SRT subtitles into MP4 — free, in-browser

Hardcode an SRT subtitle file into your MP4 video. 100% browser-based — no upload, no watermark, no signup. Free forever.

SRT / VTT / auto-generated → MP4

Hardcode subtitles into MP4 — no upload, free

Permanently bake subtitles into your MP4 video. Runs 100% in your browser with WebCodecs. No upload, no signup, no watermark. Free.

VTT (WebVTT) → MP4 / WebM / MOV

Burn VTT subtitles into video — free, in-browser

Hardcode a WebVTT subtitle file into your video. Works with MP4, WebM, MOV. 100% in your browser with no upload, no watermark, no signup.

MKV → MP4 (one-line remux), plus SRT/VTT → MP4

MKV subtitles — remux to MP4, then burn them in

Browsers cannot decode MKV — but a one-line remux converts it to MP4 in seconds without re-encoding. Then burn your subtitles in, free, in your browser.

SRT / VTT → WebM / MP4

Burn subtitles into WebM — free, in-browser

Hardcode subtitles into a WebM video locally in your browser. No upload, no watermark, no signup. Works with VP9 and AV1 encoded WebM.