Help center
Guides for running checks, reading reports, managing your account, and troubleshooting Noplag.
Everything here describes what Noplag does today. If a page mentions a limit or a plan, it matches what the product actually enforces.
New to Noplag? Start with Getting started — it covers creating an account and running your first check.
Running checks
Running a check
Paste text, upload a file, or submit a URL, and the limits for each.
Match sensitivity
Set the minimum match length and exclude short or quoted passages.
Live web layer
Checking against live search results, and which plans include it.
Noplag Database
What the shared submission corpus is and how to opt out.
Reading results
Reading a report
Highlighted passages, matched sources, and exporting to PDF.
Similarity score
What the percentage means, and why a high score isn't always plagiarism.
Sharing reports
Share links, password protection, and revoking access.
Folders
Organize checks and check new work against your own past documents.
Account and billing
Managing your account
Profile, password, sign-in methods, and workspace settings.
Billing and plans
Plan limits, upgrading, check packs, and invoices.
Account and privacy
What we store, data retention, and deleting your account.
API keys
Creating and revoking keys for the developer API.
Apps
Reference
FAQ
Short answers to the questions we get most often.
Troubleshooting
Uploads that fail, checks that stall, and missing sources.
Glossary
Fingerprint, winnowing, corpus, and the other terms used here.
Still stuck?
Email support@noplag.com with the check ID from the report URL — it's the fastest way for us to see what you're seeing. Developers building against the API want the developer docs instead.