Where is my input processed?

Tool calculations and conversions run locally in your browser. Existing analytics and advertising requests are separate from input processing.

Readability Score Checker

Estimate English reading difficulty with six disclosed formulas.

English formula estimates, at least 10 words. Short samples are less reliable.

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Last reviewed: 2026-08-26 · Testing methodology

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Estimate English reading difficulty with six disclosed formulas.

English prose; at least 10 words; at most 100,000 characters. Use Try example where available to see the expected shape.

Select the relevant mode or settings. Automatic tools update as you type; other tools use the labeled primary action.

Check the result against your input, then use the available copy or download action. Edits clear or recompute the result.

English readability formulas with heuristic syllable counts. Processing stays in your browser.

Inputs are processed in your browser. Analytics and advertising can make separate network requests.

Names, abbreviations and short samples reduce reliability. SMOG below 30 sentences is exploratory, not a comprehension assessment.

Use your target editor or runtime when exact platform behavior or a broader capability is required.

Review record: 2026-08-26. See the documented behavior and limitations above, and the testing standards for the scope of review.

What does this tool support?: English prose; at least 10 words; at most 100,000 characters. Names, abbreviations and short samples reduce reliability. SMOG below 30 sentences is exploratory, not a comprehension assessment.
Where is my input processed?: Tool calculations and conversions run locally in your browser. Existing analytics and advertising requests are separate from input processing.