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A quick way to understand who this helps, what it solves, and where it connects next.
Anyone converting subtitle files for web video.
Using the srt to vtt converter without installing anything or signing up.
Capture srt-to-vtt intent with a fast, browser-side tool that runs 100% locally.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
SRT and WebVTT are close subtitle cousins, but players that expect .vtt reject SubRip files because they lack the WEBVTT header and use comma millisecond separators. This converter reads the SubRip cues you paste, rewrites each timestamp to the period format WebVTT requires, adds the header, and optionally preserves the original cue numbers as VTT cue identifiers. Everything happens locally in your browser, so captions never leave your device and you can copy the result or download a ready .vtt file.
Short answers for the questions people usually have before trying a utility like this.
Both store timed subtitle cues, but WebVTT (.vtt) begins with a WEBVTT header and uses a period as the millisecond separator, while SubRip (.srt) uses a comma and numbers each cue. VTT is the format HTML5 video expects.
WebVTT does not require them. This tool lets you drop the numbers or keep them as optional VTT cue identifiers, which can help when you later edit or reference specific cues.
No. The conversion runs entirely in your browser, so the subtitle text stays on your device.
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.
Paste SubRip (.srt) subtitles and get WebVTT (.vtt) with the header added and timestamps fixed. Nothing is uploaded.
Converted locally in your browser.