Readability Checker — free online tool

Flesch Reading Ease and grade-level hints help editors tune blog posts for their target audience.

When to use Readability Checker

Tune blog posts toward a target reading grade for your audience.

Useful when you want a quick answer without pasting sensitive data into random chat bots.

What Readability Checker does not do

Flesch-style estimate. Not a human editor, grammar tool, or CEFR language-level test.

How to use Readability Checker

Paste blog or essay text into Readability Checker.
Calculate Flesch Reading Ease and grade-level style scores.
Simplify long sentences if the grade level is higher than your audience.
Re-run after edits to compare before/after scores.

Practical tips

Target a grade level that matches your audience—simpler for general readers, higher for technical docs.
Shorten sentences and swap long words to lift the Flesch score quickly.
Use it as a guide, not a rule; some topics need precise, longer terminology.

Example

Paste a help article and aim for a lower Flesch-Kincaid grade for general readers.

Related tools on Webtoolshop

Word Counter — Trim length before chasing a reading grade.
Keyword Density Checker — Phrase frequency in the same draft.

Limitations

Flesch-style formulas assume English prose. Code blocks and lists skew scores.

Privacy & data

We do not run a database on this static site. Text and generated output exist only in your tab until you close or refresh the page.

Frequently asked questions about Readability Checker

What does the Readability Checker not do?

Flesch-style estimate. Not a human editor, grammar tool, or CEFR language-level test.

Give me a concrete example for the Readability Checker.

Paste a help article and aim for a lower Flesch-Kincaid grade for general readers.

Why did the Readability Checker fail or look wrong?

Try a smaller file, fewer pasted characters, or an updated browser. Extensions that block scripts or downloads sometimes interfere—test in a private window if results never appear.

Does Webtoolshop store text I paste into the Readability Checker?

We do not run a database on this static site. Text and generated output exist only in your tab until you close or refresh the page.