What is FileCompare?
A simple yet powerful online text and file comparison tool. It quickly compares lists or text snippets, accurately highlighting additions, deletions, and changes. Ideal for code reviews, data deduplication, and proofreading.
How to use FileCompare
- 1
Paste your first list into the left text area (one item per line).
- 2
Paste your second list into the right text area.
- 3
Choose comparison options like case sensitivity or ignoring whitespace if needed.
- 4
Click 'Compare Lists' to see the results broken down by category.
- 5
Export any result set—A only, common, B only, or union—as JSON, CSV, or HTML.
Key features
Compares two lists line by line to highlight unique items, overlaps, and duplicates
Runs entirely in your browser, so your data never leaves your device
Exports results as JSON, CSV, or HTML table with one click
Adjustable settings: case sensitivity, ignore empty lines, normalize case, and more
Computes A-only, B-only, intersection, union, and symmetric difference at once
Use cases
- Marketers clean email lists by comparing lists to find new leads or remove duplicates.
- Data analysts validate datasets, cross-check record IDs, or spot missing entries.
- Developers quickly diff configuration files, server lists, or user inputs without writing a script.
- Students check research data for discrepancies or merge reference lists.
- Proofreaders identify changed items between document versions or glossaries.
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Frequently asked questions about FileCompare
Common questions to help you decide if FileCompare is right for you.