Free · No upload · No account

Compare two Excel files and see every change

Drop an old workbook and a new one. SheetDelta shows every changed cell, formula, sheet, and structural edit — right in your browser, with nothing sent to a server.

Compare files below How it works

Old / Base file

.xlsx .xlsm .xls .xlsb

or click to browse

New / Modified file

.xlsx .xlsm .xls .xlsb

or click to browse

Files never leave your computer. All processing happens locally via WebAssembly.
Runs 100% in your browser. Your files never leave your computer.

What SheetDelta catches

Every changed cell

Values and formulas, added and deleted, highlighted in place — not a wall of “Sheet1!B7 differs”.

Formulas as logic

Compares the meaning of a formula, so a reference that shifted when you inserted a row is shown as a real change.

Inserted & deleted rows

Detects structure, so adding one row at the top doesn’t report every row below it as changed.

Sheets & names

Catches added, removed, and renamed worksheets and named ranges across the whole workbook.

Save-noise immunity

Ignores the cosmetic churn Excel writes on every save — shared-string reordering, calcChain shuffles, style renumbering.

Nothing uploaded

Both files are read and compared in your browser. They never travel to a server, so there’s nothing to leak.

How to compare two Excel files

  1. 1

    Drop your original workbook into the left slot and the new one into the right.

  2. 2

    SheetDelta reads both files in your browser and runs the diff — no upload, no waiting on a server.

  3. 3

    Read the result: green for added, red for removed, amber for changed, sheet by sheet.

No install, no macros to paste, no formula to write. If you’ve been doing this with =Sheet1!A1=Sheet2!A1 and conditional formatting, this is the same job in one drag.

Why a real Excel diff beats a text compare

A spreadsheet isn’t a text file. Open an .xlsx and you’ll find a zip of XML, where one inserted row, a recalculated value, or a re-saved style can rewrite half the file without changing anything you care about. Generic “compare two files” tools drown you in that noise.

SheetDelta understands the workbook: it aligns sheets and rows, reads formulas as logic, and filters the cosmetic churn — so what’s left is the handful of changes that actually matter. That’s the difference between “these files are different” and “the discount rate in Assumptions!B12 went from 8% to 9%.”

Frequently asked questions

Is it free, and do I need an account?
It’s free and there’s no account. Open the page, drop two files, read the diff. You only pay if you later want a team to share history, comments, and an audit trail on the hosted platform.
Do my files get uploaded anywhere?
No. The comparison runs entirely in your browser using WebAssembly. The two workbooks are read locally and never sent to us — there is no server to send them to.
What file types can I compare?
The web tool compares .xlsx and .xlsm workbooks. For .xlsb, legacy .xls, deeper VBA, and chart/pivot comparison, use the desktop app or hosted platform.
Will inserting a row break the comparison?
No — that’s exactly what naive row-by-row tools get wrong. SheetDelta aligns the sheets first, so an inserted or deleted row shows up as one change instead of shifting everything below it into false positives.
How big can the files be?
Because everything runs locally, file size is limited by your browser and machine rather than an upload cap. Very large workbooks are better handled by the desktop app, which uses the full engine.
Can I compare two versions of the same file over time?
Yes. Many people use it to answer “what changed since last week?” If that question comes up every week, the hosted platform watches your files and keeps the history for you.

More Excel comparison tools

Compare Excel sheets →

Match sheets and rows even after they move, so inserts don’t drown the real changes.
Excel diff →

A real diff for Excel — formula logic and structure, not a line-by-line text compare.
Spreadsheet compare →

A modern, cross-platform alternative to Microsoft Spreadsheet Compare.
Compare .xlsx files →

Diff two .xlsx workbooks without opening Excel or installing anything.
Compare .xlsm files →

See macro and formula changes in macro-enabled workbooks.
How to compare two Excel sheets →

Every method — formulas, conditional formatting, Power Query, and the one-click tool.

Comparing the same workbook every week?

Let SheetDelta watch your SharePoint or OneDrive files, keep the history, and route each change for review.

See the platform Excel version control