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Enter text on both sides to compare differences automatically
What is Diff Checker?
A private online diff checker for comparing two text snippets with side-by-side view, unified diff view, and word-level highlighting.
Key Features
- Side-by-side text comparison
- Unified diff view
- Word-level highlighting
- Added, removed, and changed statistics
- Ignore case and whitespace options
- Swap comparison direction
Common Use Cases
- Compare code snippets
- Review document edits
- Check API payload changes
- Find small text differences quickly
Example workflow
- Paste the original text on the left and the revised text on the right.
- Choose line or word-level comparison depending on the review task.
- Check additions, removals, and unchanged sections before sharing the result.
- Copy the cleaned comparison notes into your issue, document, or code review.
Safe use tips
- Redact credentials, private logs, customer records, and unpublished copy before comparing.
- Normalize formatting when whitespace differences are not important.
- Keep the original source files when the diff is used for release or legal review.
Frequently Asked Questions
What can I compare with Diff Checker?
You can compare plain text, code snippets, logs, configuration files, and other text-based content.
Is the text uploaded?
No. The comparison runs locally in your browser.
Does it support word-level differences?
Yes. The tool can highlight changes at the word level in addition to line-level differences.
Can I ignore whitespace or case?
Yes. Options are available to ignore case and whitespace differences.