Scribbr is best known to students for citations and proofreading, and it also runs an AI detector. Many people check their drafts with it because it is easy to find and simple to use.
Quick Answer
Yes, Scribbr's detector is built to flag ChatGPT text, mostly on longer, unedited passages. It is an indicator, not proof, and it can be wrong either way. If your university uses a different checker, see how Turnitin detects ChatGPT.
What Scribbr's AI Detector Does
You paste text into the tool and it estimates how much of it looks AI-generated, based on patterns in wording and structure. It is aimed at students checking their own work before submission rather than at institutions grading it.
- Pattern-based — it estimates likelihood and does not know who wrote the text.
- Length matters — short passages give it little to judge, so scores are less stable.
- Student-facing — it sits alongside Scribbr's proofreading and citation tools.
Reliability: What to Keep in Mind
These are general points about detectors, not our own test results.
The most important point: a clean result on one detector doesn't guarantee a clean result on another. Different tools are trained differently, so always check with the one that actually matters for your situation.
How to Lower an AI Score Before You Submit
Rework, don't just reword
Change sentence structure and order of ideas. Synonym swaps leave the pattern a detector reads untouched.
Humanize the draft
Paste it into Fresh Text to rebuild rhythm and structure.
Put yourself in it
Specific examples, sources you actually read and your own conclusions make the work yours.
Know your rules
Policies on AI use differ by course. Follow the ones that apply to you.
Frequently Asked Questions
Does Scribbr detect ChatGPT?▾
Scribbr offers an AI detector that is designed to flag text written by ChatGPT and similar models. It works best on longer passages of unedited AI text.
Is the Scribbr AI detector accurate?▾
Scribbr presents its detector as a helpful indicator, and like all detectors it can be wrong in both directions. It is not designed to be proof that a person used AI.
Is Scribbr's AI detector free?▾
Scribbr has offered a free version with limits on text length, plus a premium version. Check their site for the current limits and pricing, as they change.
Can Scribbr flag human-written text?▾
Yes. Writing that is formal, formulaic or in a second language can look predictable to a detector and receive a higher AI score than it deserves.
How can I lower my Scribbr AI score?▾
Change the structure and rhythm of your text rather than single words: vary sentence length, add concrete personal detail and humanize the draft before a final read-through.
Conclusion
Scribbr's detector can flag ChatGPT text and is a quick way to sanity-check a draft. It is not the final word, and neither is any other detector. Improve the writing itself, and verify with the checker your institution actually uses.