Content tool
Readability Checker
Check reading level, sentence length, and rhythm before you publish.
Your score appears here
Paste text on the left and check.
Get the playbooks behind these tools
One practical SEO, AEO, and marketing signal every Tuesday. Free, no noise.
The Readability Checker scores your text on the Flesch Reading Ease and Flesch–Kincaid Grade scales — the same standards used to keep writing clear — and flags the long sentences dragging it down. Paste an article, email, or landing page and see exactly how hard it is to read.
It runs entirely in your browser, so nothing you paste ever leaves your device. Aim for plain English (60+ reading ease) unless you're writing for a specialist audience.
What it does
- Flesch Reading Ease + Flesch–Kincaid grade level
- Word, sentence, and syllable counts
- Average sentence length and syllables per word
- Flags sentences over 25 words to tighten
How to use it
- 01Paste your text into the box.
- 02Hit check — the score and metrics appear instantly.
- 03Shorten the flagged long sentences and simplify dense words, then re-check.
FAQ
- Is the readability checker free?
- Yes — free, no signup, and it runs entirely in your browser, so your text never leaves your device.
- What score should I aim for?
- For general audiences, aim for a Flesch Reading Ease of 60 or higher (roughly 8th–9th grade). Specialist or technical writing can sit lower, but clarity almost always helps.
- How is the score calculated?
- It uses the Flesch Reading Ease and Flesch–Kincaid Grade formulas, based on your average sentence length and syllables per word — the long-standing standards for measuring readability.