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.

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No credit card required · 5 free comparisons per month

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 30 MB 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, 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 .xls files. We support files up to 30 MB.

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

Start free, upgrade when you need more

Free

$0 /month

Perfect for getting started.

  • 5 comparisons/month
  • All change types detected
  • Up to 3 MB files
Get Started
Most Popular

Pro

$19 /month

For power users and teams.

  • Unlimited comparisons
  • AI-powered analysis
  • Up to 30 MB files
  • 90-day history
View Details

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 Excel files (.xlsx and .xls) 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?
Yes. The free plan includes 5 comparisons per month with files up to 3 MB. The Pro plan ($19/month) offers unlimited comparisons, AI-powered analysis, 30 MB files, and 90-day history.
What file formats are supported?
Excel Change Log supports .xlsx and .xls files. Both modern and legacy Excel formats are fully supported.
How fast is the comparison?
Most comparisons complete in seconds, even for large workbooks with thousands of rows. You can compare files up to 30 MB on the Pro plan 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. This feature is available on the Pro plan.
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?

Start comparing Excel files for free. No credit card required.

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