Guides
Step-by-step how-tos when you want a clear method—not just a one-off paste.
Each guide matches one real workflow: spreadsheet columns, messy Excel paste, exporting results, or preparing Instagram JSON from your official download. Pick the guide that fits your source data, then open the tool when you are ready to paste both sides.
Need a fast checklist? Start with How to compare two lists online. For column cleanup from Sheets or Excel, use Excel paste tips or Compare 2 lists in Excel before you trust the difference tabs.
Find missing items in a list
What’s in A but not in B—open the A only tab.
Compare without VLOOKUP
Paste two columns—no MATCH, COUNTIF, or lookup formulas.
Why two lists don’t match
Fix false mismatches from hidden characters, case, spaces, and CSV columns.
Compare 2 lists in Excel
Find differences, matches, and duplicates from two spreadsheet columns—no formulas.
Compare columns in Google Sheets
Copy two Sheets columns and compare without FILTER or MATCH.
How to compare two lists online
Five steps that work for most lists, plus which settings to try first.
Merge two lists without duplicates
Use the Union tab to combine two sources into one unique list.
Find duplicates in a list
Spot repeated lines in one list before you trust the counts.
Excel paste tips
Handle messy spreadsheet copies when a simple column paste is not enough.
Export to Excel
Turn result tabs into spreadsheet-ready files.
Instagram data download
How long it takes, which files you need, and how to upload them here.