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

The earlier version

Drop the workbook here, or browse

The later version

Drop the workbook here, or browse

Files never leave your computer. All processing happens locally via WebAssembly.

No files needed. A sample SaaS operating model and DCF, before and after a re-forecast.

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 the cells they belong to.

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, so opening and re-saving a workbook does not produce a list of edits.

Nothing uploaded

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

The free SheetDelta browser tool comparing two versions of a financial model. On the Drivers sheet, changed cells show the previous value struck through in red above the new value in green, a formula row is highlighted, and cells whose only change was formatting are marked FMT. — The result on the example workbooks above: old value struck through over the new one, in the cells where they live, with the sheets that changed counted along the bottom.

How to compare two Excel files

1.
Drop your original workbook into the left slot and the new one into the right.
2.
SheetDelta reads both files in your browser and runs the comparison there. No upload, and no waiting on a server.
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 comparison 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 is left is the handful of changes that 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 comparison. 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 deeper VBA and chart/pivot comparison, use the hosted platform.

Will inserting a row break the comparison?

No. That is 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 hosted platform, which runs the full engine on the server.

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.