DiffChecker

Easily compare document versions, ensure consistency in drafts, and check for plagiarism in student assignments.

Freemium
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Web
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Other

Try DiffChecker free

Free plan available
No credit card

What is DiffChecker?

DiffChecker is a document comparison tool that highlights differences between two text versions side by side. It helps writers, editors, and educators spot changes, track edits, and verify content consistency across drafts. The tool also includes plagiarism detection, making it useful for teachers checking student work and organisations verifying original content. You can compare plain text, code, PDFs, and other document formats by pasting content directly or uploading files. The interface shows additions, deletions, and modifications in colour coded format for easy scanning.

Key features

Side-by-side text comparison

displays two document versions with differences highlighted in colour

Plagiarism detection

scans submissions against online sources to identify copied content

Multiple format support

compare text, code, PDFs, and Word documents

Merge functionality

combine changes from different versions into a single document

Line-by-line analysis

pinpoint exact edits and modifications between versions

Download results

export comparison reports for record keeping or sharing

Pros & cons

Advantages

Free version covers basic comparison needs without requiring payment
Simple, intuitive interface requires no training or technical knowledge
Useful for both content creators tracking edits and educators checking academic integrity
Fast processing of documents without lengthy upload or analysis times

Limitations

Free tier has limitations on document size and plagiarism detection depth
Plagiarism detection may miss paraphrased content or obscured copying
Limited advanced features compared to dedicated plagiarism or version control tools