Cover Letter AI Checker
Worried your cover letter or personal statement reads as AI-written? Paste it below to get an instant AI score and see which sentences carry the strongest AI signals.
Use it to review your draft before you apply. Results are probabilistic signals — detectors can flag human writing as AI — so treat the score as guidance, not a verdict.
How recruiters and admissions actually read AI cover letters
Drafting a cover letter with ChatGPT is common now; submitting the draft untouched is the problem. Screeners who read hundreds of applications encounter the same AI phrasings — 'I am confident that my diverse skill set', 'I thrive in fast-paced environments' — over and over, and filter them out on instinct before any tool gets involved. A letter with no names, numbers, or specific events loses on distinctiveness regardless of whether a detector ever sees it. On top of that, some employers and admissions offices do run AI-detection screening (do colleges check for AI?), so a letter that reads machine-written can lose twice.
Why cover letters trigger false positives
Cover letters are one of the hardest text types for detectors. They're written in a uniformly formal register, follow a predictable structure (motivation → experience → fit), and favor polished achievement statements over emotional variation. Those traits — even sentences, predictable structure, formal vocabulary — happen to be the statistical profile of AI writing. So a cover letter you wrote entirely yourself can still score high. Don't panic over the number; ask of each highlighted sentence, 'could this sentence sit in someone else's letter unchanged?' If yes, it's missing your specifics — that's what to fix.
Pre-submission checklist
1. One only-you sentence per paragraph — a project name, a metric, a dated event. 2. Cut repeated transitions — 'furthermore' and 'additionally' on every paragraph reads mechanical. 3. Vary sentence length — mix short declaratives into the long formal ones. 4. Anchor to this company — if the letter works with the company name swapped, it's generic to humans and machines alike. 5. Re-run flagged sentences — rewrite the highlights with your own detail, re-check, and keep your drafts; they're your best evidence of authorship if a screener ever questions it.
よくある質問
Can colleges or employers tell if my cover letter is AI?+
Some screen with AI detectors, but a score is not proof and false positives happen. Generic, voiceless writing is a bigger giveaway to human readers than any tool.
Why does my self-written cover letter score high?+
Cover letters are formal, structurally predictable, and polished — statistically similar to AI output. Add project names, metrics, and dated events to flagged sentences; specificity lowers the score and strengthens the letter.
Should I check my cover letter before submitting?+
It's a useful gut check — it shows which lines read as generic so you can rewrite them in your own voice. Keep your drafts as evidence of your process.
Is using AI for a cover letter cheating?+
Using AI to brainstorm is usually fine; submitting AI-written content where it's prohibited is not. Check each application's policy and keep the final words your own.
Is my cover letter stored anywhere?+
Your text is used only to produce the result and isn't kept beyond processing. There's no account or login. Still, remove sensitive personal identifiers before checking.
⚠️ 免責事項：AI Killerの結果は確率的なシグナルであり、100%正確ではありません。検出器は人間の文章をAIと誤判定することがあるため、盗用・不正行為・学業評価の唯一の根拠として使用しないでください。