Free writing tools
19 small utilities that run entirely in your browser. No account, no limits, no upload — your text never leaves the tab.
That claim is worth being able to check rather than believe: what happens to your text sets out where it goes on each part of this site, including the parts that do reach a server. If you want to run any of this from your own code instead, the API and the MCP connector are both in private beta, and how to get access says what that currently means.
Text similarity checker
Measures how much two documents share, using the same 8-gram method this site runs on its own pages. Not a plagiarism checker.
Open tool →Lexical diversity calculator
Measures vocabulary variety with MATTR, which holds steady as your text grows — and shows why the usual type-token ratio does not.
Open tool →Reference checker
Cross-checks every citation against your reference list — missing entries, uncited sources, mismatched years. It cannot tell you a source is real.
Open tool →Nominalization finder
Finds verbs buried inside nouns — “made a decision” for “decided” — and names the verb that would replace the phrase.
Open tool →Quote checker
Checks every quotation in your writing against the source you paste, and shows what the source actually says where they differ.
Open tool →AI disclosure generator
Turns what you actually did into a plain-language disclosure statement you can adapt to your institution's wording.
Open tool →Sentence opener checker
Shows how every sentence begins and which openers repeat — the monotony sentence length alone will not reveal.
Open tool →Invisible character detector
Finds zero-width spaces, byte-order marks and look-alike letters hiding in pasted text — and strips them.
Open tool →Word & character counter
Words, characters, sentences, paragraphs — plus reading and speaking time, live as you type.
Open tool →Case converter
Switch between UPPERCASE, lowercase, Title Case and Sentence case, then copy the result.
Open tool →Text cleaner
Remove extra spaces and stray line breaks, straighten smart quotes, strip leftover Markdown.
Open tool →Sentence rhythm analyzer
Every sentence as a bar. Flat rhythm is what detectors flag — see yours at a glance.
Open tool →Text diff checker
Compare two versions word by word — additions in green, removals in red.
Open tool →Word frequency counter
Your most repeated words with counts and density — catch the crutch words.
Open tool →Character counter with platform limits
Live character count checked against X, Instagram, meta descriptions, app store listings and more.
Open tool →AI word finder
Highlights the words and phrases that make writing read as machine-generated, with counts for each.
Open tool →Essay structure checker
Paragraphing, signposting, citations and padding — the structural things the other tools don't look at.
Open tool →Readability checker
Flesch Reading Ease, Flesch–Kincaid grade and Gunning Fog — with an honest note on what they can't tell you.
Open tool →Prompt library
Eighteen prompts for getting first drafts that sound less machine-made, grouped by what you are writing.
Open tool →Need more than a utility?
HumanFlow rewrites AI drafts to read naturally and scores them for AI, with the signals behind the number — free up to 1,500 words per scan.
Try the humanizer free