Merge Sheets (Joins)
Upload CSV or XLSX files, choose matching columns, and merge rows with left, right, inner, or full joins.
What this Excel merge tool does
This tool helps you combine two spreadsheet datasets by matching values in a shared column. That could be a customer ID, email address, order number, SKU, invoice code, or another common field that appears in both files.
Instead of relying on brittle formulas or manual copy-paste workflows, you can load two files, select the join keys, preview the merged output, and export the result. It is useful when you need to enrich one sheet with columns from another or compare overlapping records across exports.
Common use cases
- Match CRM contacts with campaign performance exports using email addresses.
- Combine product data with inventory or pricing sheets using SKU values.
- Join finance exports from different systems using account or transaction IDs.
- Merge customer support data with account ownership sheets.
- Compare operational reports from two teams and identify matching or missing rows.
- Replace repeated VLOOKUP or XLOOKUP work with a clearer join workflow.
Join types explained
Left join
Keeps every row from the first sheet and adds matching data from the second sheet where available. This is often the best choice when your primary dataset is in the left-hand file.
Inner join
Keeps only rows where the selected key exists in both sheets. Use this when you want the overlap between two datasets.
Right join
Keeps every row from the second sheet and adds matching data from the first. It is useful when the second file is the dataset you care about most.
Full join
Keeps all rows from both sheets, matching where possible and preserving unmatched rows from either side. Use this when you want a complete combined view.
When to use Merge Sheets instead of formulas
Spreadsheet formulas can work well for simple lookups, but they become harder to manage when files are larger, column names change, or multiple datasets need to be compared. A dedicated merge workflow can be easier to review and less error-prone because the join logic is explicit.
If you are cleaning exports, combining reports, validating records, or preparing data for analysis, a sheet merge tool can save time and reduce manual mistakes.
Frequently asked questions
What does Merge Sheets do?
It combines two spreadsheet-style files by matching values in a shared column and supports left, inner, right, and full joins.
Can I use this instead of VLOOKUP?
Yes. For many workflows, merging sheets is a cleaner alternative to repeated lookup formulas, especially when you need to preview and export the full joined dataset.
Do I need to upload data to a server?
No. The tool is designed to process spreadsheet data in the browser so your files stay on your device.