ACCOUNTANT TOOLS

Merge & Dedupe Spreadsheets

Combine CSV tables and remove duplicate rows by all fields or selected columns.

Free to use No sign-up Runs in your browser

First CSVSecond CSV

Optional deduplication columns (comma-separated; blank compares every column)

MERGED DATA

Add one or both CSV tables to merge.

Only matching headers are combined; rows with missing columns retain blank cells. Choose a stable key to avoid removing legitimate repeat transactions.

Review all outputs before use

These tools process entries in your browser and do not submit data to tax authorities, banks, or accounting platforms. Calculations and generated files are drafts, not tax, legal, or accounting advice, and may not match current statutory or vendor-specific formats. Verify every figure and requirement with official sources or a qualified professional before relying on or filing results.

Uploaded files and entered data remain in this browser session. Avoid entering unnecessary personal, tax, or banking information. Scanned-document text detection depends on browser support and is not a substitute for reviewing the original document.