Does Codility Detect Copy and Paste?

2026-09-15

Pasting a snippet into a Codility editor feels harmless until you wonder who can see it. A lot of candidates worry that one paste will flag their whole test.

Here is the straight answer.

Yes, Codility can detect pasting, but only when the hiring team turns on proctoring for that test. When it is on, pastes into the editor are logged and recruiters can read the exact code you pasted.

What Codility tracks

Copy-paste tracking is one of Codility's behavioral signals. Its help center says the feature "monitors any attempts made by candidates to paste code into the solution area of the IDE."

It also watches the problem text. "Candidates attempting to copy the task description, despite the inability to copy it within the IDE, are detected by this feature."

So there are two separate events:

• Pasting code into the editor
• Trying to copy the task description out

When it applies

This is not on for every test. Codility says "Proctoring is disabled by default, giving recruiters the flexibility to choose when to enable it on new tests."

Recruiters can also pick and choose. They "can enable the entire set of behavioral signals or selectively choose the signals they wish to monitor for a given test."

If tracking is on, you should be told up front. Codility says candidates "will see a disclosure on the session's intro page" that lists the behaviors recruiters can see.

What the hiring team sees

The pasted code itself is saved. "Events related to copy-pasting will also be listed in the Timeline tab of the candidate report, allowing recruiters to inspect the pasted code."

Recruiters can filter candidates by "Pasted code lines, Attempt to copy task description" and other signals.

Codility also tells reviewers not to jump to conclusions: "It's important to remember that not all behavioral signals, on their own, are indicative of cheating." Tab switches are tracked in the same system, covered in does Codility track tab switching.

Working without touching the clipboard

The simplest way to avoid paste flags is to not paste. Type your own code, and keep your notes and thinking off the test page.

StealthCoder is a desktop app that runs separately from the browser. It reads the problem on your screen and helps you work through it, so there is no copying the prompt out and no pasting code back in.