# Plagiarism Checker

## What This Tool Helps You Do

Reduce originality risk by finding likely overlap and rewriting sections before publication.

## How The Semrush Version Works

Semrush's plagiarism checker compares text for similarity and flags passages that may need revision.

## How This Version Works Without Third-Party APIs

This version focuses on internal duplicate-risk checks and rewrite workflows. It does not rely on paid external plagiarism databases; instead, it helps teams identify and improve high-risk passages using internal content operations.

## Best For

- Editorial teams with originality standards
- Agencies repurposing similar client content
- Teams publishing at scale across many pages

## How To Use It

1. Open [Open AI Content Optimizer](/tools/content-optimizer).
2. Paste content you want to validate.
3. Mark repetitive or high-risk sections.
4. Rewrite flagged parts and run a final review.

## What To Track After Running This Tool

- Number of flagged passages per draft
- Rewrite completion rate
- Originality confidence before publishing

## Related Pages

- [Open AI Content Optimizer](/tools/content-optimizer)

## Next Step

Build an editorial gate: no article publishes until flagged overlap sections are rewritten and approved.