# Excel Change Log

> Web app that compares two spreadsheet files (.xlsx or .csv) and shows a visual, Excel-faithful diff — cell values, formulas, styles, embedded images, charts, and structural changes. Free tier available; Pro adds unlimited comparisons, AI summaries, and share links.

Excel Change Log is a browser-based SaaS for spreadsheet professionals (finance, ops, audit). Upload Version A and Version B, review changes in a unified or side-by-side grid, export or share read-only links. No desktop plugin required.

Key facts: Free plan — 5 comparisons/month, 3 MB files, first 5 sheets, source files kept 3 days. Pro plan — $19/month, unlimited comparisons, 30 MB files, all sheets, AI analysis, password-protected share links, 90-day history.

Machine-readable product JSON: https://excelchangelog.com/.well-known/product.json
Full text bundle: https://excelchangelog.com/llms-full.txt

## Product

- [Home](https://excelchangelog.com/): Compare Excel files with a visual diff. Primary landing page.
- [Free demo](https://excelchangelog.com/demo): Try comparison online without signup (1 MB demo limit).
- [Pricing](https://excelchangelog.com/pricing): Free vs Pro plans and feature matrix.
- [Alternatives](https://excelchangelog.com/compare/alternatives): How this tool compares to text-only diff utilities.

## Features

- [Visual Excel Diff](https://excelchangelog.com/features/visual-diff): See every spreadsheet change in an Excel-faithful grid. Visual diff for cell values, styles, formulas, and structure — not a text dump.
- [Image & Chart Diff](https://excelchangelog.com/features/image-and-chart-diff): Compare embedded images and charts in Excel workbooks. Most diff tools stop at cell text — Excel Change Log shows visual changes in place.
- [Excel Version Tracking](https://excelchangelog.com/features/version-tracking): Track spreadsheet versions over time with change log projects. Upload v1, v2, v3 and auto-compare consecutive versions.
- [AI Spreadsheet Analysis](https://excelchangelog.com/features/ai-analysis): Get a plain-English summary of what changed between two Excel files. AI analysis on Pro turns diff data into reviewer-ready explanations.
- [Shareable Excel Comparisons](https://excelchangelog.com/features/share-links): Share read-only comparison links with teammates and auditors. Password protection and expiry available on Pro.

## Use cases

- [Compare Budget & Financial Models](https://excelchangelog.com/use-cases/finance): Compare budget Excel versions and financial model revisions. Catch formula, structure, and presentation changes before sign-off.
- [Spreadsheet Audit & Compliance](https://excelchangelog.com/use-cases/audit-and-compliance): Document spreadsheet changes for audit trails and compliance reviews. Share read-only diff links with reviewers.

## Guides

- [How to Compare Two Excel Files](https://excelchangelog.com/blog/how-to-compare-two-excel-files): Step-by-step guide to comparing two Excel files online. Upload, review visual diffs, and share results with your team.
- [Excel Version Control Best Practices](https://excelchangelog.com/blog/excel-version-control-best-practices): Practical tips for tracking Excel file versions, naming conventions, and review workflows that prevent silent spreadsheet errors.
- [What Changed in My Spreadsheet?](https://excelchangelog.com/blog/what-changed-in-my-spreadsheet): Find out what changed between two spreadsheet versions — cells, formulas, charts, images, and hidden structural edits.
- [How to Choose an Excel Diff Tool](https://excelchangelog.com/blog/choosing-an-excel-diff-tool): Compare Excel diff tools by what they detect: cell values, formulas, styles, images, charts, and structure. A buyer's checklist for finance and ops teams.

## API (mobile & integrations)

- [Product JSON](https://excelchangelog.com/.well-known/product.json): Machine-readable pricing, limits, URLs, and API base for AI agents.
- Mobile REST API base: `https://excelchangelog.com/api/v1` (Bearer token auth; register via POST /api/v1/auth/register).
- Public demo requires no API key. Comparison engine runs server-side; clients are thin.

## Locales

- [English](https://excelchangelog.com/)
- [Español](https://excelchangelog.com/es)
- [日本語](https://excelchangelog.com/ja)
- [简体中文](https://excelchangelog.com/zh-hans)
- [繁體中文](https://excelchangelog.com/zh-hant)

## Legal

- [Privacy policy](https://excelchangelog.com/privacy): Data handling, file retention, cookies, third parties.
- [Terms of service](https://excelchangelog.com/terms): Acceptable use and subscriptions.

## Optional

- [Blog index](https://excelchangelog.com/blog): Excel comparison guides and change-tracking tips.
- [Sitemap](https://excelchangelog.com/sitemap.xml): All indexable marketing URLs.