Data MenuData Menu
Free Data Menu Tool

Data Merge & Dedupe ToolFast utility.

Deduplicate rows by selected columns and merge remaining values. Works with CSV and Excel—fully client-side.

Use toolBrowse tools

Browser-first

Designed for fast, practical workflows without unnecessary friction.

Free utility

Built by Data Menu to help developers, operators and data teams move quicker.

Data-ready

Useful for formatting, cleaning, generating, converting and validating everyday data.

Interactive workspace

Paste, generate, convert or clean your data directly in the tool below.

Ready to use

Merge & dedupe spreadsheets

Group duplicate rows and merge their values cleanly.

Upload a CSV, XLSX or XLS file, choose the columns that identify a unique record, remove anything you do not need, then export a cleaner merged file. Blank-key protection, duplicate-value cleanup and live previews are handled directly in your browser.

File type

No file

Input rows

0

Columns

0

Output rows

—

Load Sample

Drop a spreadsheet here, or upload one to begin.

Works with CSV, XLSX and XLS files. The first row is treated as your headers, then the tool helps you group rows by your chosen key columns.

Smart grouping

Pick one or more key columns and matching rows are grouped into a single clean record.

Safer blanks

Blank-key protection stops empty company, email or ID cells from merging into one messy row.

CSV & Excel

Upload CSV, XLSX or XLS files and export back into the matching spreadsheet format.

Recommended Tools

Continue exploring data & formatting.

View all in Data & Formatting

Need more than a free tool?

Data Menu builds custom internal tools, AI workflows, APIs, dashboards, automations and data systems for real business operations.

Book a discovery call