Free · No upload · No account
Compare two Excel sheets and see what really changed
Two tabs in one workbook, or the same sheet across two files. SheetDelta lines the sheets and rows up first, so a moved tab or an inserted row doesn’t bury the changes that matter.
Compare your sheets right here
Drop a workbook or two files. The comparison runs in your browser — nothing is uploaded.
Old / Base file
.xlsx .xlsm .xls .xlsb
or click to browse
New / Modified file
.xlsx .xlsm .xls .xlsb
or click to browse
Why naive sheet comparison misses things
Two sheets or two files
Compare two worksheets inside one workbook, or the same sheet across an old file and a new one. Same job, one drag either way.
Sheets matched, not assumed
If someone reordered the tabs or renamed “Q3” to “Q3 final”, SheetDelta pairs the sheets up first instead of comparing tab 1 to tab 1 blindly.
Rows aligned before compare
Insert a row near the top and a naive tool reports every row below it as changed. SheetDelta aligns the rows, so an inserted row shows as one addition.
Formulas read as logic
A formula whose reference shifted when a column moved is shown as a real change, not a false match on identical text.
Values vs formulas, both shown
See when a cell’s displayed number changed, when the formula behind it changed, or both — they’re different questions and you get both answers.
Nothing leaves your browser
Both sheets are read locally with WebAssembly. There’s no upload and no server copy, so confidential workbooks stay on your machine.
Two different jobs hide behind “compare two sheets”
People type the same search for two very different reasons, and a tool that only handles one of them will quietly let the other slip through.
1. Version comparison — the same sheet over time
You have last week’s model and this week’s, and you want to know what moved. Did the
discount rate in Assumptions!B12 go from 8%
to 9%? Did someone add a row to the headcount tab? This is about catching every edit
between two states of the same workbook.
2. Reconciliation — which rows differ by ID
You have two lists keyed by customer ID, SKU, or account number, and you want to know which rows are missing on one side and which values disagree. The rows may be in a different order on each sheet, so matching by position is meaningless — you need to match by the key.
Most “compare two sheets online” tools scan strictly row by row, cell by cell. That answers neither job well: it breaks the moment rows are inserted, and it can’t reconcile lists that are sorted differently. SheetDelta aligns first, so both questions get a real answer.
How aligning sheets first changes the result
A row-by-row compare assumes row 14 on the left is the same record as row 14 on the right. That assumption holds right up until someone inserts a row, sorts the data, or moves a tab — and then it falls apart and reports dozens of changes that aren’t real.
SheetDelta starts by pairing the sheets, then aligning the rows within each pair, the way you would by eye. Once the records line up, the actual differences stand out: one inserted row, two changed numbers, a renamed tab. You spend your time reading the three changes that matter instead of dismissing forty that don’t.
Frequently asked questions
Can I compare two sheets in the same workbook?
How does it highlight the differences?
What happens if rows were inserted or deleted?
Does it compare formulas or just the values?
Can it reconcile rows by an ID instead of by position?
Is it free, and do my files get uploaded?
More ways to compare
Drop two workbooks and see every changed cell, formula, and sheet — free, in your browser.
A real diff for Excel — formula logic and structure, not a line-by-line text compare.
Every method — formulas, conditional formatting, Power Query, and the one-click tool.
Color-coded added, removed, and changed cells at a glance.
Comparing the same sheets every week?
Let SheetDelta watch your SharePoint or OneDrive files, keep the history, and route each change for review — so you stop re-running the comparison by hand.