📊 Diff Checker
Compare two texts and highlight the differences. Runs entirely in your browser.
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Modified
How the Text Diff Checker Works – Side-by-Side Comparison Like VS Code
This diff tool compares two texts line by line using an LCS (Longest Common Subsequence) algorithm — the same approach used by Git, VS Code, and other professional diff tools. It identifies additions (green), deletions (red), and modifications (changed lines with word-level highlighting showing exactly what changed within each line).
Features of This Diff Checker
- Side-by-side view — VS Code-style split panels showing original text on the left and modified text on the right
- Line-level highlighting — Added lines highlighted in green, deleted lines in red
- Word-level highlighting — For modified lines, specific changed words are highlighted within the line for precise comparison
- Line numbers — Both panels show line numbers for easy reference
- Synchronized scrolling — Both panels scroll together for easy comparison of large texts
- Diff statistics — Summary of total additions, deletions, and modifications
Common Use Cases for Text Comparison
- Code review — Compare two versions of a file to see what changed before committing
- Configuration comparison — Diff production vs staging config files, .env files, or YAML/JSON configs
- API response debugging — Compare expected vs actual JSON responses
- Document revision tracking — See what changed between two drafts of a document, blog post, or email
- Database record comparison — Paste two rows or records to spot field-level differences
- Merge conflict resolution — Compare conflicting versions when resolving Git merge conflicts
Understanding Diff Output Colors
- ● Green background — Line or word was added in the modified text
- ● Red background — Line or word was deleted from the original text
- Highlighted words within lines — Specific words that changed within a modified line, making it easy to spot small changes