Free online tool
Text Diff Checker
Compare two texts or text files side by side and merge changes in either direction.
Original text
Type text or drop a file
Changed text
Type text or drop a file
Inputs and files are not uploaded. UTF-8 · 2MB maximum
How to use
- Paste the original and changed text into the two editors.
- You can also open or drop UTF-8 text files.
- Compare the text to see changed lines and words.
- Use the arrows to merge a change in either direction.
- Edit or copy the updated text.
Example
Compare an original value such as “Status: Beta” with “Status: Released,” then merge the change in either direction.
Frequently asked questions
Are texts or files uploaded?
No. Comparing, reading, and merging happen in your browser.
Which files are supported?
UTF-8 text files up to 2MB, including TXT, Markdown, CSV, JSON, and source files.
Does merging change the original file?
No. Only the text in the browser changes.