Nothing leaves your device
Files are read and converted by the page itself, in your browser. They are never sent to a server, and nothing is kept after you close the tab.
Free tools
Free subtitle tools, nothing uploaded.
Convert subtitle files between SRT and WebVTT, or fix subtitles that are out of sync. Each tool works right here in your browser, so your files stay on your device and there is nothing to sign up for.
- SRT → VTT
SRT to VTT converter
Turn a SubRip file into WebVTT for HTML5 video and web players, with the header, timestamps and tags fixed for you.
Open the tool - VTT → SRT
VTT to SRT converter
Turn a WebVTT file into a clean, numbered SRT for video editors, YouTube and social platforms.
Open the tool - ± Timing
Subtitle timing shifter
Move subtitles earlier or later by seconds or milliseconds, for the whole file or from any cue onward.
Open the tool
How they work
Built for the files people actually have.
Subtitle files come out of many different editors, and plenty of them bend the rules. These tools read them anyway and tell you what they found.
Messy files welcome
Missing cue numbers, Windows line endings, a byte order mark, timestamps without hours or with the wrong separator: all of it is read correctly.
Problems pointed out
Malformed timestamps, overlapping cues, empty cues and cues that end before they start are listed with line numbers, so you can find them.
Which format?
SRT for editors and uploads, WebVTT for the web.
SRT is the plain format that video editors and upload forms read. WebVTT is the W3C format HTML5 video players use, with room for positioning and styling. The guide covers the differences in detail.
Read SRT vs VTTFrom video to subtitles
Don't have subtitles yet? AutoCap generates them from your video.
Upload a video with English speech and get captions with a timing for every word. Edit any word, then export a burned-in MP4 rendered in your browser at up to 2K, or download SRT and VTT files on a paid plan. The free plan includes 2 minutes a month.