Zovo Subtitle Fix

Fix subtitle timing in SRT and VTT files.

Zovo Subtitle Fix repairs out-of-sync subtitles. Shift all cues earlier or later, convert the timing between frame rates such as 25 and 23.976 fps, or sync the whole file on two cues you know. Then trim overlapping cues, give short cues a minimum duration, strip formatting tags, renumber, and convert between SRT and WebVTT. You get the fixed file and a CSV change log with the old and new times of each cue. Before you get the link, the new file is read again and each time is compared with the formula.

What it does

Shift all cues by milliseconds, earlier or later
Frame-rate conversion with true ratios (23.976 = 24000/1001)
Two-point sync on a first and a last cue
Overlap trimming and a minimum cue duration
SRT to WebVTT and WebVTT to SRT, tag stripping, renumbering
A CSV change log with old and new times per cue

Try asking

“My subtitles are 2.5 seconds late, shift them earlier”

“Convert these subtitles from 25 fps to 23.976 fps”

“Check this SRT for overlaps and cues that are too fast to read”

Limitations

SRT and WebVTT only; SSA/ASS, SUB and SBV files are not read
UTF-8 or UTF-16 with a byte order mark; other encodings are refused with a message
Up to 10,000 cues and 2 MB, times below 100 hours
It does not listen to the audio: you give the offset, frame rates or two reference times
Cue text is not changed except for the tag stripping you ask for and the escaping that WebVTT needs

Add it

ChatGPT: once Zovo Subtitle Fix is approved, add it from the ChatGPT plugin directory.

Claude: go to Customize > Connectors > Add custom connector and enter https://subtitle-fix.zovo.one/mcp. No sign-in is needed. Once Zovo Subtitle Fix is listed in the Claude connector directory, you can add it from there too.

Other MCP clients can connect to the same endpoint: https://subtitle-fix.zovo.one/mcp