Grammar & Readability Checker

Hemingway-style highlighting. Paste your text, see what to fix — no AI rewrites your words.

No AI · No rewrites · No data sent anywhere
Paste or type your text on the left — highlighted results appear on the right
Highlighted results will appear here after you click Check writing.

What is the Grammar & Readability Checker?

A Hemingway-style readability checker that highlights potential issues in your writing using colour-coded underlining. It flags sentences that are hard to read, adverbs that could be replaced with stronger verbs, passive voice constructions, and weak or wordy phrases. Unlike AI writing tools, it never rewrites your text — it only shows you where to look. Your text never leaves your browser.

When would you use it?

Blog posts and articles

Check your writing before publishing — identify long sentences that readers might lose track of, and passive voice constructions that make writing feel distant.

Emails and business writing

Business writing benefits from clear, direct language. Use the checker to spot wordy phrases and unnecessarily complex sentences before hitting send.

Academic writing

Check the readability grade of an essay or report. Academic writing often scores high on the grade scale — use the checker to identify areas where clarity could be improved without sacrificing precision.

Marketing copy

Good marketing copy is concise and active. The checker highlights passive voice and filler phrases that dilute the impact of your message.

Non-native English writers

The colour-coded highlighting makes it easy to spot patterns in your writing — particularly useful for identifying overuse of adverbs or passive constructions.

Frequently asked questions

The Flesch-Kincaid grade level estimates the US school grade needed to understand a piece of writing. Grade 6–8 is ideal for most web content and general audiences. Grade 12+ indicates complex writing suited to academic or technical audiences. Ernest Hemingway famously wrote at around Grade 4.
Passive voice occurs when the subject of a sentence receives the action rather than performing it — for example 'The report was written by the team' instead of 'The team wrote the report'. Active voice is generally clearer, more direct and more engaging.
Adverbs often indicate a weak verb choice. 'She ran quickly' can become 'She sprinted' — more vivid and more concise. Cutting adverbs is one of the easiest ways to tighten writing.
No — deliberately. The tool highlights issues for you to review and decide on. Automated rewrites often change meaning, tone or voice in ways the writer did not intend.
It is similar in approach to the Hemingway App but runs entirely in your browser with no account, no subscription and no data sent anywhere. It does not check spelling or grammar rules like Grammarly — it focuses purely on readability and style.
Yes. All analysis runs locally in your browser using JavaScript rules. Your text is never sent to any server or processed by any AI.

No AI involved

Every highlight is produced by simple, transparent rules — word length, sentence length, known passive patterns. Your words are never rewritten or sent anywhere.

What's a good grade?

Grade 6–8 is ideal for most web content and emails. Hemingway himself wrote at around a Grade 4. Academic writing typically sits at Grade 12+.

Passive voice

"The report was written by the team" is passive. "The team wrote the report" is active. Active voice is clearer and more direct.

Adverbs

"She ran quickly" can become "She sprinted." Cutting adverbs and choosing stronger verbs makes writing more vivid and concise.