Online C Compare Tool
Find difference between 2 text files. Just input or paste original and modified text and click Compare button. Fast, Private & Unlimited.
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C
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How to compare C files/code side by side & View Diff
- Copy the original C in the block on the left
 - Copy the modified C in the right block.
 - Just click 
Comparebutton to view side by side comparison. - View the differences highlighted in colors.
 
Online C Diff Checker Tool Features
- Privacy: This tool does all the processing on your browser, so nothing is saved on our server unless you choose to save.
 - Hightlight: This tool highlights the differences between the two C files. It uses red color to highlight the deleted string and green color to highlight the added string. Also calculates the number of lines added and deleted.
 - Beautify: This tool can also beautify or format your C code. Right click on the pane you want to beautify/prettify & select Format Document or click Format button. This is very helpful when you are comparing code from websites that often minify C files.
 - PDF Export: You can save the diff view as PDF file for sharing with others privately.
 - Public Share: You can share the diff view publicly with others by saving online and sharing the URL.
 - Syntax: This C diffing tool can show syntax highlighting for your comfort.
 - Search: You can easily find all the occurances of particular string if you want to change them.
 - Navigation: You can navigate through the differences using the arrows on the bottom right corner of the diff view.
 - Ignore Options: You can use options like trim whitespace, render side by side, word wrap for better comparison.
 - Secure: All the data is encrypted and sent over 128-bit SSL/TLS secure connection for online saved data.
 - No Installation: This is a web based tool, no software installtion required. It works on any modern browser like Firefox, Chrome, Edge etc on Windows, Mac or Linux based computer.
 - Unlimited: There is no limit on number of comparisons you can do. You can compare as many C files as you want.
 
Is C comparison processed & stored on remote server?
No, all the processing is done on your 🖥 browser, so nothing is saved on our server unless you choose to save to share online.
For private sharing, you can download the diff as PDF file.
Recent Updates
- Feature10/12/2025
Added local history to save comparisons in your browser.
 - Feature4/26/2025
Import public files from URLs
 - Feature4/6/2025
Import files from Microsoft OneDrive
 - Feature4/6/2025
Import files from Microsoft OneDrive
 - Feature3/26/2025
Import files from Google Drive
 - Feature3/26/2025
Import files from Google Drive
 - Feature3/15/2025
Compare XML, JSON & YAML by values
 - Feature2/3/2025
Added ability to swap between original and modified text.
 - Improvement2/2/2025
Format XML
 - Feature2/1/2025
Show/Hide unchanged text regions.