SRT to WebVTT Converter
Convert subtitles between SRT and WebVTT for YouTube, Vimeo, and HTML5 players.
Hello, world.
↓ becomes ↓
WEBVTT
00:00:01.000 --> 00:00:04.000
Hello, world.
Subtitle Time Shifter
Subtitles out of sync? Shift every SRT timestamp forward or backward by an exact number of seconds.
YouTube Chapter Generator
Turn titles and times into correctly formatted YouTube chapters, with checks for the 0:00 start rule.
YouTube Title & Description Checker
Check a title against the 100-character limit and a description against 5,000 characters, live as you type.
Why this site stays fast
Purely static: no database, no backend, no images, no web fonts, no tracking scripts. All processing happens in your browser, so the server only serves tiny text files — easy for a small free workspace, and well within a 200 GB monthly allowance.
Frequently asked questions
Do my subtitle files get uploaded? No. Nothing is sent to a server by these tools.
Is it really free? Yes. All four tools are free and need no account.