Fix subtitles in seconds.
Three focused tools for anyone who edits, watches or translates subtitled video: shift timing back into sync, convert between SRT, VTT, ASS and TXT, or merge two languages into one bilingual track. Everything runs in your browser \u2014 no account, no cost, no catch.
Three tools, one job each
No bloated all-in-one editor. Pick the tool that matches what's wrong with your file.
Sync Shifter
Subtitles drifting ahead of or behind the dialogue? Shift every timestamp by a fixed offset, down to the millisecond.
Shift timing → TOOL / 02Format Converter
Move between SRT, WebVTT, ASS and plain-text transcripts. Upload once, choose your output, done.
Convert a file → TOOL / 03Bilingual Merger
Combine two subtitle tracks into one file, with both languages stacked in every cue.
Merge two files →From broken to fixed, in one pass
The same three-step flow runs behind every tool on this site.
Upload your file
Drag in your .srt or .vtt file, or click to browse. Nothing uploads until you press the action button.
Set your options
Enter an offset, pick an output format, or choose a merge order \u2014 whatever the tool needs.
Download the result
Your fixed file downloads straight to your device. It's never stored on our servers.
Built for the five-minute fix
Most subtitle problems aren't complicated \u2014 a track that's 2.3 seconds ahead of the audio, a file a media player won't accept, or two language files that need to become one. FinovoCalc exists for exactly that kind of task: open the tool, fix the specific thing, get back to watching. No project files, no rendering queue, no account to remember a password for.