Subtitle Toolkit
FastSRT Tools
Most of these tools run entirely in your browser and do not require signup.
Client-firstNo signup required
.srt
SRT to VTT
Convert clean SRT caption files into WebVTT for browsers and web players.
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.vttVTT to SRT
Turn WebVTT files into a standard SRT export for YouTube and editing apps.
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.srt, .vttSubtitle Time Shift
Move every cue forward or backward by a fixed amount and clamp negative timestamps safely.
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.srt, .vttSubtitle Cleaner
Normalize cue numbering, line breaks, and invalid blocks into a cleaner delivery-ready SRT file.
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.srt, .vttSubtitle CPS Checker
Flag high reading speed, long lines, and risky cue durations before you publish.
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.srtSRT to Text
Extract plain transcript text from an SRT file without timestamps or cue numbers.
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