CaptionStack
Private by design

SRT TO VTT

SRT to VTT.

Convert SubRip (.srt) subtitles to WebVTT (.vtt) in seconds. No upload, no sign-up, nothing leaves your browser.

SRTVTTSBVLRCTTMLJSONCSVTXT
1

Choose your caption file

We’ll detect the format automatically. Drop several files to convert them all at once.

Don’t have a file handy?
2

Choose an output format

Select what you need on the other side.

100% privateYour files never leave this device.
8 formatsBuilt for the caption formats you use.
No limitsConvert as often as you need.

How to convert SRT to VTT

  1. Drop your .srt file into the converter above, or click to browse. Several files at once become a ZIP.
  2. Check the quality report and fix timing or text in the editor if you need to.
  3. VTT is already selected as the output format. Click Download converted file.

Conversion happens entirely in your browser. Nothing is uploaded, no account is needed, and there is no file count limit.

About SubRip (.srt)

SRT files are plain text: a sequence number, a start and end time written as HH:MM:SS,mmm, and one or more lines of caption text. Almost every video player, editing suite, and social platform accepts SRT, which makes it the safest interchange format when you are not sure what a tool supports.

About WebVTT (.vtt)

WebVTT is the native caption format for the HTML5 <track> element and for most web players, including Video.js, Plyr, and HLS streams. It looks similar to SRT but requires a WEBVTT header, uses a period before the milliseconds, and supports optional cue identifiers, positioning settings, and styling.

What changes when converting SRT to VTT

Cue identifiers are preserved when the source has them. Positioning and styling settings are not carried from other formats, and VTT NOTE, STYLE, and REGION blocks are skipped on import.

Frequently asked questions

Is this SRT to VTT converter free?
Yes. CaptionStack is free and open source, with no limits on file count or conversions.
Are my caption files uploaded anywhere?
No. Parsing and conversion run in your browser using a local Web Worker. Your files never leave your device.
Can I edit the captions before exporting to VTT?
Yes. After import, open the editor to adjust start and end times, fix text, split, merge, or reorder cues. The quality report flags overlaps, short cues, and fast reading speeds with one-click fixes.
Can I convert many .srt files to .vtt at once?
Yes. Drop multiple files and download all of the results as a single ZIP archive.

Other SRT conversions

Other ways to get VTT

All caption formats