AI humanizer for writers
Writers use AI to speed up drafts, then spend the saved time fighting the residue it leaves. Leap scores and cleans your draft right in the browser so you can revise in your own voice.Publish in your voice
Paste your own draft and try it. Detection and humanization are free, run locally in your browser, and require no account. Your text is never sent anywhere.The detector gives you a 0 to 100 AI signal score and highlights the sentences that weigh most. The humanizer does a cleanup pass: it swaps stock AI phrases, removes em dashes and invisible characters, and marks uniform sentence lengths so you can vary them yourself.The writer's five pains
- Speed vs voice. AI drafts 10x faster than longhand, but the output reads like a model, not like you. You end up rewriting the whole thing and losing the speed advantage.
- Editor-side detectors. Many publications run AI detectors on submissions, and a flagged piece can get killed without discussion. Detectors are signals, not proof, and they can be wrong, but the risk lands on you.
- SEO penalty fear. Google's helpful content system targets low-effort content, and generic AI-sounding prose is often part of that picture.
- Byline risk. A public claim that one of your pieces was AI-generated can damage your reputation more than the speed gain was worth.
- Client contracts. Agency and ghostwriting contracts increasingly require human-authored content, and violation can void payment.
How Leap fits a writer's workflow
Leap is built for the draft, revise, verify loop. Each feature targets a specific stage:- Sentence-level scoring. Paste a finished draft into the detector. You see a 0 to 100 score from writing signals: uneven vs uniform sentence length, stock AI phrases, hedging and transition words, em-dash density, and repetition, plus highlights on the sentences that weigh most. Revise the flagged ones by hand where voice matters.
- Cleanup humanization. The humanizer replaces stock AI vocabulary, removes em dashes and invisible characters, adds contractions where natural, and flags uniform-length sentences for you to vary. Your argument stays yours; the revision decisions stay yours.
- Privacy. Everything runs in your browser. Nothing is uploaded, stored, or trained on, which matters for under-embargo assignments and confidential client work.
Five realistic scenarios
How different writers use a detector and cleanup pass in practice.Scenario 1: 2,000-word blog post for a B2B client
You brainstorm with Claude, draft sections in ChatGPT, stitch, then run the detector before sending. The highlights show which sections still read as machine-written, so you rewrite those by hand instead of guessing. The client runs their own detector on deliverables, so you check with the same kind of signals first.Scenario 2: Newsletter post in your established voice
You have 20k subscribers who know your voice. AI makes drafting faster but flattens the cadence that built the audience. Run the draft through Leap, then pick three paragraphs and rewrite them by hand, the peak moments that carry your reader.Scenario 3: Op-ed submitted to a national outlet
The outlet bans AI-generated prose. Your research and outlining happened with AI but the draft is handwritten. Still, stiff academic-register phrasing can trip detectors. Use the detector to spot flagged sentences and rewrite them before submission.Scenario 4: Novel draft, chapter skeleton
You use AI to push past writer's block on connective scenes: a character walks across a room, a flashback transition. Clean up the connective prose but keep voice-carrying passages, dialogue, internal monologue, fully your own. Never run a humanizer over voice work.Scenario 5: LinkedIn thought-leadership for a founder
You ghostwrite posts for a CEO. AI drafts the skeleton, you transcribe the CEO's voice notes over the top, then clean up the residue before posting. Feeds tend to down-rank content that reads as generic and machine-like.Responsibility note
A humanizer is a finishing tool, not a content-creation tool. If your piece has no original reporting, no original argument, and no original voice, a cleanup pass will not fix that, and should not. Leap does not guarantee passing any detector and does not promise to bypass any checker. An AI score is a signal, not proof: detectors can be wrong, and a score must never be the only basis for accusing anyone of using AI. See our methodology for how we think about detection quality, and our primer on AI vs human writing for the specific patterns to watch for.Frequently asked questions
If you publish raw AI output, often yes: many editors can spot it within a paragraph, and many publications screen submissions with detectors. If you clean up the residue and then revise by hand until the prose carries your voice, rhythm, and judgment, the draft's origins stop mattering editorially. Note that detectors can be wrong in both directions, so treat any flag as a prompt to revise, not a verdict.
Many do. Wired has published a policy prohibiting AI-generated text in published pieces, and the Associated Press, The New York Times, and The Atlantic have similar rules. Some outlets allow AI for background research only. Always check the masthead's AI policy before submitting on spec.
Google's helpful content system and core updates target low-effort content, and its own guidance says quality is rewarded regardless of origin. In practice, quality means prose that reads as human and carries original insight. Real editorial contribution is what keeps you safe; a cleanup pass alone is not a strategy.
Some, if you run raw model output through any tool and publish the result. The right workflow is: draft with AI, use Leap to strip stock phrasing and flag uniform sentences, then rewrite the top and bottom of each section in your own voice. The detector highlights show you exactly where to focus.
Yes, but be careful. Detection signals like burstiness, the variance in sentence length, are stylistic dials in fiction. If your voice is deliberately uniform, Hemingway-short or Didion-rhythmic, uniform-sentence flags may be intentional style, not flaws. Use the tool on connective prose, not on voice-carrying passages.
For freelance and agency writers, check your client contract first; many agency MSAs now include AI-disclosure clauses. On the technical side, Leap runs entirely in your browser and your text is never sent anywhere, which suits confidential work. The client's detector policy is what matters: Leap does not guarantee passing any detector, so check your final draft against whatever the client uses.