AI detector for Writers

1. 1

   Draft your work in your normal voice

2. 2

   Paste into AI Checker for a stylistic baseline check

3. 3

   Review which sentences read as AI-shaped (often the cleanest, most polished ones)

4. 4

   Rewrite flagged sections with more variation, voice, or specificity

5. 5

   Re-check until your work scores cleanly human

The writers use case, in detail.

Writers — both those who use AI tools and those who don't — increasingly run their own work through detectors as a stylistic check. The most valuable use isn't catching AI authorship (you know whether you wrote it); it's catching AI-shaped writing patterns that creep in from heavy editing tools, grammar checkers, or style guides. If your work consistently scores 30-50% AI on detectors, that's a signal that your voice has become predictable in a way readers will eventually notice. AI Checker's sentence-level breakdown is the actionable tool here: highlight the specific sentences that read as AI-shaped, then revise them with more sentence-length variation, more first-person framings, or more idiosyncratic word choices. For writers using AI for brainstorming or research (legitimate uses), AI Checker helps ensure none of the AI-generated phrasing made it verbatim into final prose.

The writers workflow, in depth.

The most underrated use of AI detection is by writers on their own work. The detection score doesn't tell you who wrote the piece — you know that — but it tells you whether your writing has drifted toward the patterns that AI also produces, which is a quiet stylistic warning that's hard to get from any other source. AI-shaped writing creeps into human prose through several routes: heavy use of grammar tools (Grammarly, Hemingway) that nudge toward shorter, balanced sentences; corporate style guides that enforce signposted structure; templated formats (5-paragraph essays, listicles, how-to guides) that AI also reproduces; and unconscious imitation of AI prose readers see daily. If your work consistently scores 30-50% AI on detectors despite being written from scratch, that's a signal worth listening to. The actionable response is sentence-level: AI Checker's breakdown highlights the specific sentences in your draft that read as AI-shaped. The fix is usually to add sentence-length variation (mix short, medium, and long), first-person framings ("I think" rather than "It is thought that"), and idiosyncratic word choices that AI defaults wouldn't pick. For fiction writers, the diagnostic is whether your prose has texture — AI prose is smooth in a way human prose with texture is not. For essayists and op-ed writers, the diagnostic is whether your voice is recognizable across paragraphs — AI prose is voice-less in a way that's hard to articulate but easy to spot in detection scores. AI Checker is also useful as a sanity check for writers using AI legitimately for brainstorming, research, or first drafts: the detection score helps verify that none of the AI-generated phrasing made it verbatim into your final published prose, which is the line many writers want to draw between "AI-assisted" and "AI-written".

Built for writers who need actionable detection.

• Sentence-level breakdown. Every result includes per-sentence scoring with the most likely source model identified — so the output is actionable evidence, not just a single percentage.
• Free tier with no daily traps. Up to 10,000 characters per check, unlimited checks per day, no signup required. Paid tiers exist for volume and team features, not as a tax on the free experience.
• API access on every plan. Integrate detection into your existing workflow with a clean REST API. Documentation includes example clients in TypeScript, Python, Go, and Rust.
• Privacy-first by default. Submissions are processed in memory and not used to train models. No third-party advertising trackers. Read our security & privacy policy for the long version.
• Multi-model coverage. We detect ChatGPT, Claude, Gemini, Llama, Mistral, Microsoft Copilot, and emerging open-source variants — not just GPT.

Detection by model, comparison, and language.