Toolbox for developers / Online CSV diff

CSV compare

This tool allows to compare CSV files and visualize the differences. It compares line by line, and indicates which fields are different.

You can see the user guide to help you to use this csv compare tool.

First CSV to compare

Second CSV to compare

CSV comparison

User guide

This tool allows to compare two CSV files, and visualize the diff.

Copy and paste, drag and drop your CSV files or directly type in the editors above, and they will be automatically compared!
You can also click on "load CSV from URL" button to load your file from a URL (Must be https).
You can also click on "Browse CSV file" button to load your CSV from a local file.

You can select the separator, the quote and the escape characters to use for CSV files:

  • Separator: The character that separates columns within each line.
  • Quote: The quoting character to use when a data value is quoted.
  • Escape: The character to use to escape a "quote" character.

You can also directly compare two CSV files by specifying their urls in the GET parameters url1 and url2.

This tool highlights in red color the data which are different.

Why compare CSV files ?

Comma-separated values (CSV) is a delimited text file that uses a comma to separate values. Each line of the file is a record which contains fields, separated by commas. Sometimes the separator can be another character (semicolon, tab ...).

Many applications use the CSV format to transfer data. This format is convenient for exporting and / or importing data. For example, databases can often export in this format. It is often preferred for large amounts of data.

Sometimes it is necessary to compare CSV files. For example to detect the differences between two exported files.

It can be complicated when the CSV file are large, this tool allows you to compare CSV easily.

Online CSV compare tool

CSV diff tool allow to compare two CSV files online. The comparison is done directly in your browser, Your CSV files are not sent to the server side!

CSV diff tool makes a line by line comparison, then it compares each field according to their position in the line. Your csv files must be sorted so you can compare them.

It is a new tool, you can give us your feedback, and make comments.

Load CSV From URL
You can report a bug or give feedback by adding a comment (below) or by clicking "Contact me" link (at the top right hand corner of the page).


jole-2019-09-01 09:43
Excellent tool, thank you! I have two easy ways in which it can be greatly improved: Properly parse CSV where the data is quoted, taking into account columns that contain commas in their values. Any kind of "save" or "export", in any format that's easiest to export, as I'd like to view the data somewhere other than this page. Cheers!

Cyril (admin)-2019-11-20 21:12
Thank you :) Thank you for these ideas, I will study this! Regards,

Cyril (admin)-2019-11-29 21:35
Hi, your suggestions have just been put in place :)

Amit-2019-11-20 07:43
Best online CSV comparator tool, I loved it!! The UI show the difference is awesone, data arranged in different columns and i get to know the exact value from two files in one plac, if it is not matching. Thanks

Cyril (admin)-2019-11-20 21:00
Thanks :) !

Ioannis Karagiorgos-2020-01-09 15:44
Great tool, thank you very very much :-)

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