Online List Comparator

Powerful online list calculator & comparator that makes data comparison simple and efficient

List Calculator List Comparator List Analyzer

Four Core Features

Only in A

Identify items unique to list A to quickly recognize its exclusive data. Perfect for removing duplicates and spotting differences.

Only in B

Extract elements unique to list B to quickly identify its exclusive content. Perfect for data cleaning and comparison tasks.

∩

AB Intersection

Calculate the intersection of two lists to find items that exist in both. This list calculator feature is ideal for identifying overlapping data.

∪

AB Union

Merge two lists into one complete set and automatically remove duplicates. Achieve efficient list compare and data integration.

Compare Lists in Three Easy Steps

Enter List Data

Paste or enter your List A and List B data into the left and right text boxes, one item per line

Click the Calculate Button

Select the calculation type you need, click the corresponding button, and the system will process your data automatically

Get Calculation Results

Instantly obtain accurate comparison results, with one-click copy support to make your data analysis more efficient

Frequently Asked Questions

What is ListDiff Online?

ListDiff Online is a powerful and easy-to-use online list comparison tool. Users simply input two lists, A and B, and can quickly generate four types of results: "Only A", "Only B", "A ∩ B", and "A ∪ B". It is suitable for data cleaning, content comparison, deduplication, and various other scenarios, making list processing effortless and efficient. It also supports large-scale data, ensuring speed and accuracy, making it an essential online tool for data analysts and office workers.

How to Input Lists in ListDiff Online?

On the ListDiff Online page, users can paste or manually input lists A and B into the text boxes, one item per line. You can also drag and drop a .txt file into list A or list B to quickly read and load the file contents.

What Does the "Only A" Result Mean?

"Only A" shows all elements present in list A but not in list B. This feature is perfect for deduplication and difference analysis. For example, if you have two customer lists and want to find the unique customers in list A, ListDiff Online can quickly calculate and display the results, improving your work efficiency.

What does the "Only B" result mean?

"Only B" shows elements that exist in list B but not in list A. Users can easily identify B-exclusive data, such as newly added entries, supplemental items, or unique information from external sources, facilitating analysis, aggregation, or database updates.

What does the "AB Common" result mean?

"AB Common" shows elements that exist in both list A and B. This is useful for finding duplicates, comparing data consistency, or filtering intersection data. Whether it's sales lists, product inventories, or document records, ListDiff Online quickly identifies the common elements between the two lists.

What does the "AB Merge" result mean?

"AB Merge" combines all elements from lists A and B, automatically removing duplicates to create a complete and clean list. This feature is ideal for integrating multiple data sources, avoiding redundancy, and improving data organization efficiency. The merged list can be copied or imported into other software, making it perfect for office work, data analysis, and project management.

Is ListDiff Online paid?

Completely free to use, no registration, login, or payment required. Users can access listdiff.online anytime to compare and merge lists, enjoying a fast, simple, and efficient online list processing experience.

Start Using List Diff Online Now

A fast, accurate, and free list comparison experience awaits you

Start List Comparison