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Readability score

Measure how easy your text is to read (Flesch score).

Related tools

All Counting & analysis tools →
Character frequency counterCount how often each character appears in your text.Count occurrencesCount how many times a word or phrase appears in your text.Vowel & consonant counterCount the vowels, consonants, letters and words in your text.Lipogram checkerCheck whether a text is a lipogram — writing that deliberately avoids one or more chosen letters, like Perec's novel that never uses the letter e. Enter your forbidden letters and it counts every violation, shows which banned letters slipped through, and gives a purity score. Accents fold to their base letter.Pangram checkerCheck whether a sentence is a pangram — text that uses every letter of the alphabet at least once. It flags any missing letters, shows a per-letter presence grid with counts, and tells you if it's a rare perfect pangram where each letter appears exactly once. Accents fold to their base letter.Pig Latin translatorTranslate text into Pig Latin, the playful word game that moves the leading consonants of each word to the end and adds “ay”, while vowel-initial words get “way”. It preserves capitalization and punctuation and treats “qu” as a single unit, with a switch for the classic ending variant.Reading speed (words per minute) calculatorMeasure your reading speed in words per minute from words read and time taken.Smart quotes removerTurn “smart” curly quotes back into plain straight ones. Word processors auto-replace " and ' with curly typographic versions, and dashes and ellipses too — which quietly break code, JSON and config files. Paste your text and get a clean, ASCII-safe copy in one click.

Readability score works straight from this page — free, instant, nothing to install. It sits under Counting & analysis in our catalogue, alongside Character frequency counter and Count occurrences.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Readability score?

Measure how easy your text is to read (Flesch score).

When would I actually use this?

Fitting a piece to a limit: an essay to a word count, a post to a network's cap, a meta description to what a result page will show.

What is the most common mistake?

Assuming one character equals one unit of the limit. An emoji can cost two or more, a combining accent can cost two, and several platforms bill a link at a flat rate regardless of length.

What else is filed next to it?

Character frequency counter, Count occurrences and Vowel & consonant counter share its section. They are not variants of it — being filed together is not the same as being alike — but that is where to look if this turned out not to be the tool you wanted.

Where do the figures come from?

Counting follows Unicode: the tool reports code points and grapheme clusters separately, because they differ for emoji and combining marks. Per-network limits come from each platform's published specification.

Further reading

All guides →
ExplainerWhat Readability Scores Actually Measure (and the Three Things They Cannot See)Flesch Reading Ease and Flesch-Kincaid Grade Level count syllables and sentence length. Nothing else. Both formulas in full, one passage scored end to end, and the comma trick that buys 3.9 grade levels without changing a word.ExplainerCounting Words Is Ambiguous, and Every Tool Answers DifferentlyA word count is a definition, not a measurement. We counted the same paragraph four ways and got 25, 28, 33 and 38 — then counted 50,000 characters of ordinary prose and got agreement to within 4.5%. The gap is entirely driven by compounds, figures and URLs.ExplainerWord Frequency and Zipf's Law: We Counted Six Books in Six Languages and Fitted the SlopeThe nth most common word appears about 1/n as often as the first. We counted six public-domain books, printed rank × frequency, fitted log frequency against log rank, and got slopes between -1.02 and -1.08 in all six languages — plus the two places the law breaks.ExplainerWhere a Line May Break: The Unicode Algorithm Behind Every Wrapped Paragraph"Break at spaces" fails in most of the world's writing systems. UAX #14 gives every character a line-break class; we looked ours up in Unicode 17.0.0 and ran a conforming implementation over no-break spaces, soft hyphens, zero-width spaces, URLs, Japanese and Thai.GuideWhat Makes a URL Slug Good: Stability, Readability and the Conflict Between ThemA slug has two jobs that pull against each other: it is a permanent identifier and it is a piece of readable text. Length, hyphens, stop words, dates, non-ASCII characters and the identifier-plus-slug pattern that gets both properties — with the real numbers from a site that localises 1,736 tool slugs into six languages.GuideCharacter Limits That Actually Bite: Code Units, Code Points and GraphemesA character is three different things at once. One emoji with a skin tone is 1 grapheme, 2 code points and 4 UTF-16 units. Every count in this guide was measured in Node, plus why an SMS drops from 160 to 70 and why VARCHAR(255) is not 255 of anything in particular.