Scribbr AI Detector is a free checker that estimates whether a piece of writing was produced by an AI model. It goes beyond a simple yes or no by separating human-written, AI-generated and AI-refined text, which helps flag content that was paraphrased by software. Paragraph-level feedback marks the specific areas likely to be AI-generated or AI-refined. It supports several languages, including German, French and Spanish, needs no account, and allows unlimited checks of up to 1,200 words per submission at no cost. Submissions are not stored or shared. It comes from Scribbr, a company known for plagiarism checking and proofreading services.
Students use it to confirm that essays and papers meet university guidelines before submitting them. Educators run student work through it as one input when reviewing authenticity, and bloggers and content editors check freelance or in-house drafts. Anyone who edits with AI help and wants to see how a text reads to a detector can also use it. Scribbr itself cautions that no detector is completely accurate, so results work best as a signal rather than proof.
Practical scenarios include checking a thesis chapter before handing it in, screening an assignment batch for passages that deserve a closer conversation, reviewing a guest post before publication, and testing whether a paraphrased paragraph still reads as machine-written. Because the checker highlights particular paragraphs, the writer can rework only the flagged sections instead of rewriting a whole document, and the lack of sign-up keeps quick checks fast.
