Readability Checker
Estimate reading ease, sentence length, and long-word frequency for English prose.

Free browser tool
No Matrix computer needed
✓ No account or card
✓ Use the result right away
✓ Task-specific limits below
Workspace
Use readability checker
Runs in this browser tab
Result
How to use it
Paste English prose to identify dense sentences and get an approximate reading-ease score.
Try this example
Matrix gives your agents a place to work. You can review their results later.
What to check
The score is a heuristic for English prose, not a quality grade or ranking factor.
Review the result before using it in a published page, application, or agent configuration.
Quick answers
Frequently asked questions
What does the readability score measure?
It estimates English reading ease from sentence length and syllable counts. It is a rough editing signal, not a quality grade.
Can I use this score for non-English copy?
The syllable heuristic is designed for English. For other languages, review clarity with a native reader or a language-specific measure.
Keep exploring
Related free tools
Keep your tools and files together with Matrix
Utilities brings everyday text, file, and developer tools into Matrix. Some advanced browser tools remain on the website. The desktop client connects to your private Matrix cloud computer, which requires a paid plan.