Readability Checker

Check approximate readability scores, average sentence length and long-sentence count for drafts and web copy.

Text

Readability

Word count: 25
Sentence count: 2
Syllable estimate: 47
Average words/sentence: 12.5
Average syllables/word: 1.88
Flesch Reading Ease: 35.1
Flesch-Kincaid Grade Level: 11.5
Long sentence count: 0

Scores are approximate because syllables are estimated locally.

How to use this tool

Enter the required values in the labeled fields. Results update in your browser and are announced for assistive technologies. Use realistic measurements and verify important outcomes before acting on them.

Formula or logic

The tool estimates syllables client-side and applies Flesch Reading Ease and Flesch-Kincaid Grade Level formulas.

Example calculation

Example: Shorter sentences and simpler words usually improve the reading ease score.

Practical use and limits

This page is built for checking, cleaning or transforming pasted text locally before publishing, sending or importing it elsewhere. The calculation is intentionally visible and described above so you can sanity-check the result instead of treating it as a black box.

Limit: browser text parsing is practical rather than legally authoritative; review sensitive copy manually. For important decisions, use this result as a planning aid and verify it against the relevant source of truth.

Last reviewed: May 29, 2026.

Readability Checker: practical guide

Readability Checker is a cleanup and publishing-control tool, not just a quick counter or formatter. It helps keep copy, support text, SEO drafts and operational notes consistent before they move into a CMS, ticket or customer message.

Use it before handoff, especially when text has been copied between documents, spreadsheets, chat tools or AI drafts. Small formatting errors are easy to miss and expensive to fix after publishing.

Real examples

Support article

Input: check a troubleshooting draft

Result: spot dense sentences before customers see it

Landing page section

Input: review a benefit explanation

Result: simpler wording without removing useful detail

Practical notes

Keep the original text until the cleaned version is checked.
Use the tool on the exact text that will be published or handed off.
For SEO or support content, readability and intent matter more than raw length.

Common mistakes

Chasing a score instead of clarity.
Shortening text until important context disappears.
Ignoring headings and examples.

Frequently asked questions

Are the scores exact?

No. They are useful estimates, not editorial truth.

Does this upload text?

No. Analysis stays in the browser.

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