Free Subtitle Tool

By CreatorIntelHQ Editorial Team · Last updated July 1, 2026 · Evidence status: Interactive tool

Based on CreatorIntelHQ methodology · How we test creator tools

Free SRT to VTT Converter (and VTT to SRT)

Convert subtitle files between SRT (SubRip) and VTT (WebVTT) instantly, right in your browser. Drop in a .srt or .vtt file, the tool auto-detects the format and converts to the other one, and you download the result with the correct extension. No signup, no email, and your file never leaves your device.

SRT vs. VTT: what is the difference?

SRT (SubRip) is the oldest and most widely supported subtitle format. Each caption is a numbered block: a cue index, a timecode line, and one or more lines of text. SRT uses a comma before the milliseconds, like 00:00:01,000 --> 00:00:04,000. It is the format most desktop video editors, YouTube uploads, and media players expect.

VTT (WebVTT) is the modern standard for subtitles on the web, designed for the HTML5 <track> element. It looks similar to SRT but with three important differences: every file must begin with a WEBVTT header line, timecodes use a period before the milliseconds (00:00:01.000 --> 00:00:04.000), and the numeric cue indexes are optional and usually dropped. VTT also supports styling and positioning cues that SRT cannot represent.

When creators need to convert between them

If you caption videos, you will eventually hit a format mismatch. A few common cases:

You exported SRT but your web player wants VTT. Self-hosted HTML5 video, many web players, and several learning-management systems only accept WebVTT for the <track> element. Your editor exported SRT, so you need to convert before the captions will show.

You have VTT but a tool only accepts SRT. Plenty of desktop editors, repurposing tools, and older upload flows still expect SRT. If an AI tool handed you a VTT file, you may need SRT to bring it back into your editor. Several of the AI subtitle tools we review export in only one format, so a quick conversion saves a re-render.

You are moving captions between platforms. YouTube accepts both, but moving the same captions to a website, a course platform, or a social clip tool often forces a format change. Converting keeps one clean caption file as your source of truth.

Common formatting errors this avoids

Hand-editing subtitle files is where captions break. This converter fixes the two mistakes people make most often: using the wrong millisecond separator (a comma where the player expects a period, or vice versa), and forgetting the required WEBVTT header that makes a VTT file valid. It also normalizes timecodes that are missing the hours field (a valid VTT shortcut like 01:23.000 that SRT cannot use) and strips the cue numbers that do not belong in a WebVTT file. The result is a clean file your player will actually load, instead of one that silently shows no captions.

Where To Go Next

Once your captions are in the right format, keep improving your workflow.

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