Compare Excel files online

Find changed cells, values, rows, and sheets. Content is processed in your browser and not sent to the application server. Everything runs locally, with no account required.

XLSX · CSV

XLSX ≤ 30 MB compressed · expanded ≤ 150 MB · 100,000 rows × 1,000 columns · CSV/TSV ≤ 50 MB

Excel Compare

Find changed cells, values, rows, and sheets. Content is processed in your browser and not sent to the application server.

XLSX · CSV
Original file
Drop an .xlsx, .csv, or .tsv file here
Updated file
Drop an .xlsx, .csv, or .tsv file here

Content is processed in your browser · Not sent to the application server · Free to use

How Excel Compare works

ExactDiff reads the first worksheet locally, matches records using the selected key, normalizes values according to your settings, and reports each changed field.

The comparison is deterministic: the same files and settings produce the same classification. File contents remain inside the current browser session.

Get a cleaner result

  1. 01Choose a stable unique key such as SKU or employee ID.
  2. 02Use a numeric tolerance when harmless rounding differences are expected.
  3. 03Review duplicate keys before relying on matched-row totals.

Frequently asked questions

Are my Excel files uploaded?

No. The browser reads and compares them on your device; ExactDiff does not send file contents to a server.

Can it compare reordered rows?

Yes. Key-based matching treats row order as irrelevant and compares the records with the same key.

Private by design

Runs in your browser

Content is processed in your browser and not sent to the application server

Works without an account