WordCounter
wordcounter.net
Counts words and characters, and shows which words you overuse
No sign-upOn device
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hemingwayapp.com
Highlights the sentences nobody is going to finish reading.
Paste a draft and it colours every hard-to-read sentence, passive construction, adverb and needlessly complicated word, then gives the whole thing a reading-grade score. It is a blunt instrument by design and will occasionally flag a perfectly good long sentence. As a final pass on something that has to be understood on the first read, nothing else is as fast.
AltFTool does this too
If you would rather not leave the site, Readability Checker covers the same job here — free, no account, and it runs in your browser.
Open Readability CheckerQuestions
Works the moment the page loads. No account, no email, no trial. The free web version has no saving, no export and no rewriting — those live in the paid desktop app.
No. Hemingway Editor does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
The free web version has no saving, no export and no rewriting — those live in the paid desktop app.
Alternatives
Same category or same task, ordered by how closely they overlap.
wordcounter.net
Counts words and characters, and shows which words you overuse
calmlywriter.com
A blank page with a focus mode that dims everything but this sentence
onelook.com
Finds the word you mean when you can only describe it
grammarly.com
Catches the grammar and tone problems you stop seeing in your own draft
languagetool.org
Open-source grammar checking across more than twenty languages
quillbot.com
Rewrites a sentence you cannot get right into several alternatives