Readability checker

Use this readability checker to score text with its language's formula. Find sentences and words that make the draft harder to read, then review your edits.

Free, no sign-up. Your text stays in your browser and is never uploaded.

Your text stays in your browser and is never uploaded.

Readability

Paste at least one full sentence to see a score.

  • Flesch Reading EaseNo score yetScale 0 to 100: higher is easier.Flesch (1948)
  • Flesch-Kincaid grade levelNo score yetA US school grade: 8 means a 13 to 14 year old reader. Lower is easier.Kincaid and others (1975)
Sentences
0
Words
0
Words per sentence
0.0
Syllables per word
0.0
Sentences over 25 words
0
Words of 4 or more syllables
0

Possible passive sentences: 0. Recognised adverbs: 0. These narrow English rules can miss cases or flag useful wording; review them in context.

Your text, marked

Long sentenceLong wordPossible passive voiceRecognised adverb

Your text appears here with marks.

Readability formulas estimate difficulty from sentence and word length. They are not a Google ranking factor; use them to find passages to read again.

A readability checker estimates how hard a draft is to read. This tool uses published formulas for eleven languages, including Flesch-Kincaid in English and Gulpease in Italian. It marks long sentences and words, adds conservative English passive and adverb prompts, and lets you save a version to compare scores after editing. Text stays in your browser.

How to use this tool

One formula per language
English uses Flesch Reading Ease and the Flesch-Kincaid grade, German the Amstad score and the Wiener Sachtextformel, French Kandel and Moles, Italian Gulpease, Spanish Szigriszt-Pazos with the INFLESZ scale, Portuguese the Brazilian Flesch adaptation, Dutch Flesch-Douma, Swedish, Danish and Norwegian LIX, and Polish Pisarek. Each result names its source.
How the counts are made
Sentences and words come from the segmenter built into your browser. Syllables are counted from spelling with rules for each language; a loanword can be off by one, so treat a difference of a few points as noise. LIX and Gulpease count letters instead of syllables.
What gets highlighted
Sentences longer than 25 words are marked, and so are words of four syllables or more, or longer than six letters in the LIX languages. English prompts also mark a short list of known adverbs and forms of be followed by a known past participle. These patterns can miss passives or mark adjectives, so read each sentence before editing. Other languages receive no English grammar prompts. The preview shows the first 3,000 words; the scores cover the whole text. Save a version to compare scores, word counts and long sentences in the same language; it stays in memory until you clear it, switch language or leave the page.

Google guidance on helpful content

Questions before you start

No. Readability formulas are not a Google ranking factor, and Google's guidance on helpful content does not mention them. The formulas estimate effort from sentence and word length only. Use the score to find hard passages for your readers, then judge the changes by reading them.

For general readers, 60 to 70 is plain English, the band Flesch called standard. Scores above 80 are easy, and below 30 is dense academic text. Technical audiences can handle lower scores, so set your target by who reads the page.

Words and sentences have different typical lengths in each language. German words are long and Italian has many syllables per word, so the English Flesch formula would mark ordinary German or Italian prose as hard. Each formula here was built or adapted for its language; LIX comes from Sweden and is also the usual measure in Danish and Norwegian.

Tools count syllables, sentences and words differently, especially around abbreviations, numbers and headings. A gap of a few points is normal. To see whether an edit helped, compare scores from the same tool before and after it.

No. The scoring runs in your browser, and your text is never uploaded, stored or used for AI. The text area is also left out of our page analytics. Closing or reloading the page clears it.

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