Characters per second divides visible characters by the cue display duration.

Is one CPS limit correct for every audience?

No. Language, age, accessibility needs, and platform guidelines can require different thresholds.

Basic HTML and ASS-style tags are removed before character counting.

Subtitle Reading Speed Analyzer

Identify subtitle cues that may be too fast or too long to read comfortably, with configurable CPS and line-length thresholds.

Local processing — your file is not sent to a server

Choose a subtitle file

The file stays in your browser.

Subtitle content

What is CPS?: Characters per second divides visible characters by the cue display duration.
Is one CPS limit correct for every audience?: No. Language, age, accessibility needs, and platform guidelines can require different thresholds.
Does markup count?: Basic HTML and ASS-style tags are removed before character counting.