Tool
What the Readability Checker does
Readability Checker: checks Words and Sentences from Your text. Example: the sample loaded on the page gives words 28.
Supply Your text and you get Words and Sentences back. Edit a field and the answer updates in place.
Typical users are people publishing a page. Small on-page details decide whether a listing gets clicked or scrolled past.
There is no back end here. The calculation runs where you are sitting, not on a server somewhere.
The rest of this page documents each field, the method, and a worked example built from the values the readability checker loads by default.
What do the Readability Checker fields mean?
The Readability Checker uses 1 input. You can work from the defaults, or clear them and start fresh, both work.
| Field | What to enter | Default |
|---|---|---|
| Your text | paste or type any amount of text | Paste the text you want to check. The tool works out Flesch Reading Ease and Flesch-Kincaid Grade Level, then flags the sentences that are dragging the score down. |
How does the Readability Checker work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same check.
The tool refuses to guess: if a value is missing or impossible, it says so.
Worked example
These are the values the Readability Checker loads by default, and the result it produces from them. Here is the calculation as it stands the moment the page loads.
| Your text | Paste the text you want to check. The tool works out Fles… |
|---|
| Words | 28 |
|---|---|
| Sentences | 2 |
What the Flesch score measures, and its real limits
Flesch Reading Ease and Flesch-Kincaid Grade Level are both built from just two measurements, words per sentence and syllables per word, which makes them cheap to compute and genuinely limited in what they can tell you.
Worth knowing
- The formulas were developed for English and calibrated on English text. Applying the same thresholds to another language, or to text dense with technical terms and proper nouns, produces a number that does not mean what it seems to.
- A commonly cited target for general web content is roughly a 7th-to-9th-grade reading level, comparable to guidance from plain-language initiatives for public-facing writing: a norm, not a rule, and highly technical content for a specialist audience should not be forced down to it.
- Readability is not a documented Google ranking factor, but it correlates with things that plausibly are: a page a visitor can actually parse quickly is more likely to satisfy the query and less likely to send them straight back to the results.
- Splitting long sentences is the single most effective edit for this score: the formula weights sentence length more heavily than word difficulty.
How to use it
- Paste your content into Your text.
- The tool reacts immediately rather than waiting for you to finish the form.
- The results panel then shows Words and Sentences.
- Copy Link is the quickest way to send the exact scenario to someone else.
What this tool does not do
- Search engines weigh hundreds of signals. No single on-page check predicts position.
- This inspects the markup you supply; it cannot see server headers or your live rankings.
- It cannot detect a typo that happens to fall inside the valid range.
Frequently asked questions
Your text, nothing else. Nothing starts empty, meaning you can explore the calculation before committing to real figures.
With the values loaded when the page opens, words comes out as 28. Any edit re-runs the calculation, so there is no stale number on screen.
Nothing is logged. The tool is client-side code; your data stays where you entered it.
Nothing at all. There is no registration, no paywall and no per-use quota.
The logic is straightforward and testable; the worked example above uses the tool’s own defaults so you can verify it yourself.