Two-File Column Matcher

Use this page to upload or paste two simple CSV/TSV files, then find matches between a key column in File A and a key column in File B. Designed to handle files with 50,000+ rows in the browser.

File A (left side)

Upload CSV/TSV

Or paste data for File A

Key column (1-based):

File B (right side)

Upload CSV/TSV

Or paste data for File B

Key column (1-based):

Match settings

This tool performs exact matches on the key columns. It assumes rows are line-based and columns are separated by commas or tabs.

Two-File Column Matcher

Match Results

CSV Output (you can copy–paste into Excel)