Subtitle Reading Speed Checker
Analyze subtitle reading speed (CPS), line length (CPL), duration limits, and timestamp overlaps.
Related tools
How it works
- 1
Paste your SRT or VTT content
Cues with timestamps and dialogue.
- 2
Audited against broadcast standards
Calculates Characters Per Second (CPS), line lengths against the 42-char guideline, and checks for overlaps.
- 3
Review warnings and report
Get an itemized list of cues that are too fast, too long, or overlapping.
FAQ
- What is the recommended subtitle reading speed?
- Industry standards (Netflix, BBC) recommend between 12 and 17 CPS. Speeds above 20 CPS are flagged as too fast for viewers to read comfortably.
- What is the standard maximum line length?
- 42 characters per line is the widely adopted maximum to prevent text crowding the screen.
- Does this tool upload my subtitles anywhere?
- No — analysis is computed in-memory in your browser.