Paste your two lists
Paste one list into each box — one item per line — or drag and drop a .txt or .csv file. Copying a column straight from Excel or Google Sheets also works.
Compare Two Lists Online — Free List Diff Tool
Compare two lists instantly — find matches, differences, and unique values. Free, no signup, nothing uploaded.
Compare Two Lists Online
Paste, drop TXT/CSV/XLSX, or paste a spreadsheet column.
Paste, drop TXT/CSV/XLSX, or paste a spreadsheet column.
Paste two lists to begin a local comparison
Results update as you type. We’ll show matches, both sides of the difference, every unique item, and any duplicates we found.
How it works
Three steps, zero friction
No signup, no upload, no waiting. Comparing lists should take seconds — and that is exactly how long it takes.
Watch results update instantly
No submit button, no page refresh. Matching items, differences, and unique values appear as you type, with a Venn diagram that visualizes the overlap.
Copy, download, or share carefully
Copy or download any result with one click. You can also create a share link when appropriate; it contains both lists, so it is not suitable for confidential data.
Use cases
What can you compare?
Any two lists of lines — people use Comparable List for everything from audience audits to data cleanup.
Instagram followers vs. following
Find accounts that don't follow you back by comparing your followers and following lists side by side.
Open toolEmail & mailing lists
Merge two subscriber lists, spot new signups, and clean duplicates before your next campaign.
Open toolCSV & Excel columns
Paste two columns from a spreadsheet and see which values changed, appeared, or disappeared.
Open toolJSON values & API data
Compare IDs, keys, or records returned by two API calls to find what's new, missing, or unchanged.
Open toolInventory & SKUs
Reconcile two stock lists and find products that are missing from one system or the other.
Open toolCRM & contact lists
Diff two exported contact lists before merging, so no lead is lost and nothing is duplicated.
Open toolSEO keyword lists
Compare keyword lists from different tools or dates to see which rankings you gained and lost.
Open toolAny two lists at all
Todo lists, names, domains, server logs, usernames — if it's a list of lines, this tool compares it.
Open toolFAQ
Frequently asked questions
How do I compare two lists online?
Paste each list into one of the two boxes above — one item per line — and results update instantly. You can upload TXT, CSV, XLSX, or XLS files, then review common items, both sides of the difference, the symmetric difference, and all unique items. The duplicate audit explains repeated entries before you export.
What is a comparable list?
A comparable list is any list of items you want to compare with another — for example two lists of Instagram followers, two mailing lists, or two inventory sheets. This free comparable list tool finds the items the two lists have in common, the items that appear in only one of them, and the full deduplicated combination of both.
Can I compare Instagram followers and following lists?
Yes. Use the Instagram follower compare page to upload the HTML files from Instagram’s followers-and-following export. It extracts profile usernames locally, then shows accounts you follow that do not follow you back — and vice versa.
Can I compare CSV files or Excel columns?
Yes. Use the CSV & Excel compare page to upload two CSV, XLSX, or XLS files, select a column from each, and review their matches and differences. You can also paste columns into the main tool.
Is this list comparison tool free?
Yes — completely free, with no account, no signup, and no limits on list size. There is nothing to install; it runs in your browser on any device.
Are my lists uploaded to a server?
The comparison runs locally in your browser; list contents are not sent to our comparison server. Do not create a share link for confidential data: a share link deliberately encodes both lists so its recipient can open the same comparison.
Does the tool remove duplicates?
Yes. The comparison uses each normalized item once, while the duplicate audit shows which entries repeat and how many times. “All unique” is the deduplicated combination of both lists, and you can export it as TXT, CSV, or XLSX.
How does the Venn diagram work?
The Venn diagram represents each list as a circle whose area is proportional to the number of items it contains. The overlap between the circles shows how many items appear in both lists. It updates live as you type, giving you an at-a-glance picture of how similar your two lists are.
Can I compare JSON files or code?
Yes. Use the JSON compare page to compare the paths (keys) or primitive values in two valid JSON documents. For line-based logs or IDs, paste them into the main list tool.