Spreadsheets & data · ONLINE TOOL

Compare two data versions

Compare mode: CSV or Excel, added/removed rows, schema differences and changed values using a unique key.

Local processingNo account required

USE CASES

When to use Compare two data versions?

Direct entry into Compare mode of “Compare & reconcile data”: compare two CSV/Excel versions using a unique key and clearly separate schema changes, added/removed rows and changed values.

Compare consecutive extracts from the same application
Review changes before migration or approval
Find columns added or removed between versions

CONCRETE EXAMPLE

Customer export V1 / V2

BEFORE

customers_before.xlsx + customers_after.csv · key customer_id

→

AFTER

Added · removed · changed rows · added/removed columns + CSV report

PRIVACY

Your data stays in the browser

Processed content is not uploaded to WorkToolset. Required libraries may be loaded by the site, but the file stays in the browser.

GOOD TO KNOW

Limitations to know

The key must be unique in each version to attribute changes correctly.
Excel styles and objects are not compared; use workbook comparison for cell/formula differences.
Approximate semantic matching belongs in Reconcile mode or Semantic Matcher.

HOW IT WORKS

A straightforward workflow.

1Load both files once.
2Choose the A and B keys even when their names differ.
3Run the comparison, then switch to Join or Reconcile without reloading if the task changes.

PRIVACY

Frequently asked questions

Are my files uploaded to WorkToolset?

No. This tool runs locally in your browser.

Is my original file modified?

No. WorkToolset creates a new copy or export.

Do I need an account?

No for this free tool. Accounts are mainly used for favorites, presets and future workflows.