CSV Difference Checker
Compare two CSV files side by side. Highlights added, removed, and modified rows.
CSV A (Original)
CSV B (Modified)
💡 Definition
CSV Comparison
- Comparing two CSV files identifies differences at the row level — what was added, removed, or changed.
- Useful for tracking changes between data exports.
📖 How to use
Step by Step
- Paste the original CSV in the left panel
- Paste the modified CSV in the right panel
- Differences are highlighted below
- Stats show counts of changes
🎯 Use cases
When to use
- Comparing database exports over time
- Reviewing data changes before import
- Audit trail for spreadsheet updates
- Validating data migration results
Frequently Asked Questions
How are rows matched?▾
Rows are compared line-by-line. Rows in B not in A are 'added', rows in A not in B are 'removed'. Matching is based on exact row content.
Can it handle large files?▾
Yes, it works well with files up to ~50,000 rows in the browser.