See your writing's reading level and which sentences are too dense, then fix them.
PDF or Word. We read the text out and score it sentence by sentence.
Readability formulas estimate how much schooling a reader needs to follow a text easily. They work on sentence length and word length, which means they measure density rather than quality: a clear sentence and a confusing one of the same shape score the same. Read it as a signal about your reader, never as a grade on your writing.
Flesch Reading Ease, Flesch–Kincaid, Gunning Fog, SMOG, Coleman–Liau and the Automated Readability Index, each shown with its score, and a single consensus grade taken as the median so one formula misbehaving on an unusual passage does not throw the headline number.
The specific sentences dragging the score are highlighted, because "grade 16" tells you nothing about what to change.
Words, sentences, syllables and how many long words you used, so the score reads as a measurement you can see rather than a verdict from nowhere.
Academic writing is supposed to read denser than a blog. A higher number is only a problem when your reader is not a specialist.
The formulas are built on English. Writing in another script is not given a score, because a confident number about a language the formula cannot read would be made up.
For undergraduate academic work, somewhere in the college range is normal and appropriate. Aim lower only when writing for a general audience, and do not chase a lower number by chopping sentences that need their length.
None is definitive, which is why this shows six and reports their median. Flesch–Kincaid is the most cited, SMOG is standard in health writing, and Coleman–Liau and the Automated Readability Index work from letters and characters rather than syllables, so a consensus of all of them is steadier than trusting any single one.
General audiences sit comfortably in the 60-70 band. Academic prose commonly lands well below that, which is expected rather than a fault.
No, and treating it that way produces worse writing. The formulas only see sentence and word length, so padding a sentence raises the score while making the point harder to find.
Yes, free and unlimited, with no account needed.