Troubleshooting

Common failure modes — uploads that won't check, checks that seem stuck, missing matches, and sign-in issues.

My upload fails or the check has no text

Scanned PDFs without a text layer contain no extractable text — the check fails with a clear error rather than returning an empty result. Run OCR on the file first, or paste the text.
Unsupported types: only PDF, DOCX, and TXT are accepted.
Size: very large files may exceed the upload limit; split the document or paste the relevant sections.

My check seems stuck

Checks run in the background and most finish in under a minute. Long documents take longer — the progress indicator shows which stage the check is in. If a check fails, its status says so with a reason; a failed check doesn't consume your quota silently. If a check is stuck for many minutes with no progress, contact support with the check's date and title.

I expected a match and didn't get one

The engine detects verbatim and near-verbatim overlap. Paraphrased or translated copying won't match (why).
The source may not be in the corpus your plan checks against — the live-web layer (Premium and up) reaches fresh web content the indexed corpus may not have.
Check the match sensitivity filters: a high small-match threshold or the quotes filter may be excluding what you're looking for.

Password sign-in and Google / Microsoft sign-in are separate — use the method the account was created with.
Password reset is available from the sign-in page.
If a reset email doesn't arrive within a few minutes, check spam, then contact support.

The verification code didn't arrive

New accounts confirm their email with a 6-digit code. If it doesn't show up: check spam, confirm the address you typed, and use "Send a new code" on the verification page (codes expire after 10 minutes, so an old email may hold a stale one).

A shared link stopped working

Share links can be revoked by the report owner — that's by design. Ask the owner for a fresh link.

Still stuck?

Contact support from the app, or email the address listed on noplag.com. Include what you did, what you expected, and what happened instead — for check issues, the check's date and title help us find it fast.