Now with AI-powered analysis

Compare Excel files.
See every change.

Upload two Excel files and get a complete, visual diff in seconds. Cell values, styles, images, formulas — nothing slips through.

Try the free demo View pricing

No signup for the demo · Then Weekly or Yearly — no Free forever account

Why Excel Change Log

A comprehensive Excel file comparison engine

We compare every layer of your workbook — values, formulas, styles, images, and structure — so no change goes unnoticed.

Cell-Level Diff

Pinpoint every changed value, formula, and number format across all cells and sheets.

Style & Format Diff

Detect font, color, border, alignment, and background changes with visual indicators.

Image Diff

Track added, removed, and modified embedded images with side-by-side comparison.

Structural Changes

Detect added or removed sheets, new cells, and deleted content across your workbook.

AI-Powered Summary

Get a plain-English summary of what changed and why it matters, powered by AI analysis.

Seconds, Not Hours

Compare large workbooks with thousands of rows in seconds. No plugins, no installs — just upload and go.

Easy Sharing

Generate shareable links for your comparisons. Anyone with the link can view the results read-only.

Version Tracking

Create change log projects on a paid plan, upload file versions over time, and automatically compare consecutive versions.

See the full picture, not just text

Other diff tools only compare cell text. Excel Change Log goes further — we render and diff images, charts, and shapes embedded in your workbook. See what actually changed, visually.

Embedded Images

Detect added, removed, or replaced images with visual preview and side-by-side comparison.

Charts & Graphs

Visual rendering of chart objects so you can see data visualization changes at a glance.

Shapes & Drawings

Track changes to arrows, callouts, text boxes, and other drawing objects in your workbook.

Visual Diff — report_Q4.xlsx
Before
After

logo_v1.png

MODIFIED

logo_v2.png

Revenue Chart

MODIFIED

Revenue Chart — bar 4 changed

Box A
Box B

Flow Diagram

ADDED
Box A
New!
Box B

Flow Diagram — shape added

3 visual changes detected

Workflow

How Excel file comparison works

Three steps to a complete Excel diff report

1

Upload

Drag and drop your original and modified .xlsx or .csv files. Demo uploads up to 1 MB; paid Weekly/Yearly have full product access (abuse guards apply).

2

Compare

Select sheets to compare and click run. Results appear in seconds with real-time progress.

3

Review & Share

Browse changes in a side-by-side Excel view. Share results with your team via a link.

Pricing

Simple, transparent pricing

Try the free demo, then choose Weekly or Yearly

Weekly

$0.99 first week

then $5.99/week. Cancel anytime.

Full product access. Unlimited comparisons.

  • Full product — unlimited comparisons
  • AI-powered analysis
  • Share links with optional password
  • Cancel anytime
Get Weekly
Best value

Yearly

$249 /year

~4.79/week — save ~20% vs weekly

Full product access. Unlimited comparisons.

  • Full product — unlimited comparisons
  • AI-powered analysis
  • Share links with optional password
  • Best value — ~20% off vs weekly
View Details

Guides

Compare Excel files — start here

How to compare two Excel files

Upload, match sheets, review the visual grid, share a link.

Excel diff approaches

Text/CSV, desktop add-in, or a visual web grid — pick the job first.

Spreadsheet Compare (Inquire)

Which Office SKUs include it, and when a browser diff is the better job.

Compare Excel files on Mac

Inquire is Windows-only. Compare .xlsx files in the browser on a Mac.

Budget and model review

Catch formula and chart edits before the CFO meeting.

Try the free demo

Upload two files or run a sample. No signup.

FAQ

Frequently asked questions

Everything you need to know about comparing Excel files

What is Excel Change Log?
Excel Change Log is a web-based tool that compares two spreadsheet files (.xlsx and .csv) and generates a detailed visual diff, highlighting changes in cell values, formulas, styles, images, charts, and workbook structure.
What types of changes can it detect?
It detects cell-level diffs (values, formulas, number formats), style changes (fonts, borders, colors, alignment), embedded image and chart modifications, and structural changes such as added or removed sheets and cells.
Is it free to use?
There is no Free forever account plan. Try the public demo for free (no signup), then choose Weekly ($0.99 first week for first-time subscribers, then $5.99/week) or Yearly ($249/year — best value). Both include full unlimited product access.
What file formats are supported?
Excel Change Log supports .xlsx and .csv files. Excel workbooks include styles, formulas, and embedded images; CSV comparisons focus on cell values.
How fast is the comparison?
Most comparisons complete in seconds, even for large workbooks with thousands of rows. Paid plans include full product access with real-time progress tracking.
Is my data secure?
Yes. Files are processed server-side over encrypted connections and are not stored permanently. We do not share your data with third parties.
Can I share comparison results with others?
Yes. You can generate shareable links for your comparisons. Anyone with the link can view the results in a read-only format — no account required.
What is the AI-powered summary feature?
The AI summary analyzes your comparison results and generates a plain-English explanation of what changed and why it matters. Included on Weekly and Yearly at the same quality.
Do I need to install anything?
No. Excel Change Log is entirely web-based. Just open your browser, upload your files, and get results — no plugins, desktop software, or extensions required.

Ready to track every change?

Try a visual Excel diff free — no signup. Then pick Weekly or Yearly.

Try the free demo View pricing