Subtitle Reading Speed Checker
Check SRT or VTT captions for reading speed and find cues viewers may not have enough time to read.
Runs locally — your content never leaves this browser
SRT or VTT subtitles
0 timed cues found
Reading-speed report
QUICK GUIDE
How to use this tool
- Paste your content into the editor.
- Review the result generated instantly in your browser.
- Copy or download it and keep creating.
See what this tool does
Before
00:00:04,000 --> 00:00:05,000 This much longer caption is probably displayed too quickly for most viewers.
After
Too fast - 74 characters per second. Increase the duration or shorten the text.
Frequently asked questions
What is a good subtitle reading speed?
A practical target for general audiences is up to about 17 characters per second. Between 17 and 20 CPS may feel fast, while anything above 20 CPS should be reviewed.
What does CPS mean in subtitles?
CPS means characters per second. It divides the visible characters in a caption by the number of seconds that caption stays on screen.
How can I fix subtitles that are too fast?
Keep the caption on screen longer, shorten the wording, split it into separate cues, or remove nonessential filler while preserving the meaning.
Can this tool check both SRT and VTT?
Yes. It recognizes both comma-based SRT timestamps and period-based VTT timestamps, then reports the reading speed of each timed cue.