AI Cover Letter Checker — Spot ChatGPT in Seconds
Paste a cover letter or upload the file and see how likely it was written by AI. Built for recruiters and hiring managers screening applications. Free, with no login for your first checks.
No login required
How to check a cover letter for AI in 3 steps
Paste or upload
Paste the cover letter text above, or upload the PDF or DOCX you received.
Run the check
Click Check for AI. ProofAI analyses the writing patterns and returns a result in seconds.
Read the result in context
You get an AI probability and a human probability. Treat it as one signal, not proof — ask the candidate about their application and compare it with their resume.
Signs a cover letter was written by ChatGPT
No single sign is proof, but these patterns are common in unedited AI cover letters.
Generic enthusiasm
"I am excited to apply for this opportunity" with broad praise for the company but no specific detail about the role.
No concrete stories
Claims of being "results-driven" and "a strong communicator" with no numbers, projects or named achievements.
Even, polished tone
Flawless grammar and a smooth, balanced rhythm throughout, with none of the small quirks of real writing.
Repeated buzzwords
"Dynamic", "leverage", "fast-paced environment" and similar terms stacked together across paragraphs.
For recruiters and hiring managers
AI-written cover letters make it harder to tell who genuinely fits a role. ProofAI gives you a fast second opinion so you can decide where to spend your time, without reading every letter line by line.
Use it as a signal, never as the only basis for a decision. A high AI score is a prompt to look closer — compare the letter with the resume, check for specific detail, and ask about it in the interview. See how ProofAI works for what the score means and its limits.
Frequently Asked Questions
Yes. You get 10 checks a day without an account and 25 a day with a free account. No credit card is needed.
No login is needed for your first checks. A free account raises your daily limit and keeps your check history.
Yes. Paste the text here, or upload a PDF, DOCX, DOC or TXT file (up to 25 MB) on the document detector.
No. No AI detector is 100% accurate. Treat the score as one signal and confirm it with the resume, specific detail and an interview before drawing conclusions.
Files are used only to produce your result and are not saved by ProofAI; they are sent to the AI model providers listed in our privacy policy to analyse them. Signed-in users keep the scores, not the text.
Related tools and guides
Last updated: 11 October 2026
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