Free browser tool
Free caption reading speed checker
Paste transcript text, SRT, or VTT captions and check whether your subtitles are readable on mobile.
Reading speed checker
Check caption reading speed
Measure words per minute and characters per second so captions stay readable on small screens.
Words
18
Characters
89
Duration
30s
WPM
36
CPS
3
Result
Comfortable for most viewers
If you paste timed SRT or VTT captions, duration is read from the file automatically.
Why caption reading speed matters
Short-form viewers scan captions quickly, but overloaded text still hurts retention. This checker helps you spot captions that need shorter lines before you burn them into a video.
Free tool FAQ
What is a good caption reading speed?
For short-form video, captions usually feel comfortable around 170 words per minute or below. Faster captions can work for energetic clips, but dense text should be split into shorter lines.
Does this tool upload my subtitles?
No. The reading-speed checker runs in your browser and does not upload transcript or subtitle text to CapzAi.