Reconcile two spreadsheets

Resolve additions, removals, duplicates, and mismatches with an exportable audit trail. 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

Spreadsheet Reconciliation

Resolve additions, removals, duplicates, and mismatches with an exportable audit trail.

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 Spreadsheet Reconciliation works

Reconciliation combines key matching, duplicate detection, configurable normalization, file hashes, and a downloadable exception report.

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. 01Reconcile counts before values.
  2. 02Document every tolerance used.
  3. 03Export the report with both source hashes for evidence.

Frequently asked questions

What is different from a normal spreadsheet diff?

Reconciliation emphasizes keys, tolerances, duplicate control, and auditable exceptions rather than cell position.

Can I ignore small numeric differences?

Yes. Set an absolute tolerance before running the comparison.

Private by design

Runs in your browser

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

Works without an account