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Excel & CSV

Compare CSV files

Compare two CSV files by a unique key. Download added, removed and changed cells with an original-versus-updated report.

Drag and drop files here

CSV

Up to 2 files · 5 MB per file

Use a direct public file link up to 20 MB, or the smaller limit shown above. The download service retrieves the file; sign-in links are not supported.

    Download an example file · Download a second example file

    Compare CSV files

    Compare inventory, contact or transaction exports using an ID column rather than row position. Reordered rows still match by key. The report distinguishes missing columns from blank cells and protects CSV output against spreadsheet formulas.

    How to use this tool

    1. Choose your source file, drag it into the upload area, or import a direct public file URL.
    2. Review the settings and create your result.
    3. Download and check the output before using it.

    Supported input formats

    • CSV

    Available settings

    • Key column
    • Key matchingExact matchTrim spacesTrim spaces and ignore case

    Output and limitations

    Compare two CSV files by a unique key. Download added, removed and changed cells with an original-versus-updated report.

    First file: original. Second file: updated. Use a unique key in every row. Comma-separated CSV only; up to 10,000 rows and 100 columns per file. Duplicate keys stop the comparison. Reports stop at 100,000 changes.

    Can I compare Excel workbooks?

    Export each worksheet as comma-separated CSV first. Workbook formulas, formatting and extra sheets are not compared.

    What if processing fails?

    Check the supported formats and file limits, then try a smaller file. Keep an original copy. A clear error message will explain an unsupported input or an unavailable processing service.

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