Paste a passage to get Flesch Reading Ease, an approximate grade level, plus word, sentence, and syllable counts.
Paste some text to score readability.
Paste or type your text into the main field.
Stats and results update as you type — no submit button.
Copy or clear when you are done.
Flesch Reading Ease rewards shorter sentences and simpler words; higher scores are easier to skim. Flesch–Kincaid estimates a U.S. school grade. The formulas are English-oriented, but they still help compare drafts in other Latin-script languages as a relative signal—not a literary judgment.
Paste text into Flesch Readability Score and read the live result. Nothing is sent to a server for typical use — adjust the input until the output looks right, then copy it.
Start with a short sample to confirm the reading. Large pastes are fine once you trust the output. Use Reset if you want a clean slate.
Whenever possible, Flesch Readability Score processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.
The classic formulas were tuned on English. Treat scores as a relative clarity signal when comparing two drafts, not as an absolute label.
Syllables are estimated with a lightweight heuristic so everything can run offline in your browser.
For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.
Yes. Flesch Readability Score is free, with no sign-up and no artificial usage caps for normal personal and work use.
Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.