#611 · Accessibility Tools

Subtitle Reading Speed Checker

Check subtitle reading speed by parsing SRT or VTT timing, estimating words and characters per second, and flagging cues that may be difficult to read.

Text Input

Private, in-browser processing
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How to use this text tool

  1. Paste text or choose a plain-text file.
  2. Set only the options that apply to your content.
  3. Select Run Subtitle Reading Speed Checker or press Ctrl/Cmd + Enter.
  4. Review every flag or change in its original context before publishing.

What this tool does

This page applies focused, explainable checks or formatting rules to the text you provide. The output is meant to support an accessibility review, not replace testing with disabled people and assistive technology.

The tool uses local pattern matching, text measurement, and the options shown above. It does not send your text to an external language model or silently change the source file.

Treat automatic suggestions as editorial prompts. Preserve meaning, respect self-identification, and follow the accessibility requirements of the platform where the text will appear.

Example

Load the sample to see a realistic input for the subtitle reading speed checker. Run it once with the defaults, then change an option and compare the visible report and downloadable data.

Use cases

  • Review content before a website or app release.
  • Prepare subtitles, documents, forms, or interface copy for an accessibility audit.
  • Give editors a concrete list of passages that need human judgment.
  • Export a small review record for collaboration.

Tips for better output

  • Keep a copy of the original before accepting changes.
  • Read each result in the surrounding paragraph or interface.
  • Test with the assistive technology used by your audience.
  • Prefer specific wording over automatic one-for-one substitutions.
  • Ask affected readers for feedback when a choice is uncertain.

Processing details

All analysis runs in this browser tab. Unicode-aware matching is used where practical, and results can be copied or exported as text, CSV, or JSON when structured findings are available.

No automated checker can understand every cultural, linguistic, technical, or personal context. The built-in rules are intentionally conservative and the final decision remains with the editor.

Frequently asked questions

What subtitle formats can this reading speed checker parse?

It reads standard SRT and WebVTT timing lines. Cue settings and basic HTML-style subtitle tags are ignored when counting visible text.

What is the difference between WPM and CPS?

Words per minute estimates language reading load, while characters per second is useful across languages and for unusually long words.

Why is a short cue sometimes flagged?

A cue can contain only a few words yet still be too fast if it remains on screen for a very short time.

Does the checker change subtitle timing?

No. It reports cues that exceed your selected limits so you can decide whether to shorten, split, or retime them.

Are my subtitle files uploaded?

No. Parsing and calculation happen in your browser, and the selected file is not sent to a server by this page.

Review guide

CheckWhat to confirm
MeaningThe output keeps the intended information.
ContextFlags are reviewed in the full sentence or interface.
TestingThe final content is tested with relevant users and technology.