Diff Checker Online - Compare Text & Code
Compare two text versions, code files, or documents and see additions, removals, and exact inline changes clearly.
Compare text and files
Paste text or load a supported text file into either side.
Your files are processed locally in your browser and are not uploaded.
Drop a text file here
Drop a text file here
Ready to compare
Paste text into both panels and click Compare.
Comparison Result
0 modified lines
0 added lines
0 removed lines
0 unchanged lines
Inline precision
Modified line
Removed text
Added text
Unchanged
Counts above are for lines. Inline highlights show exact text changes within modified lines.
OriginalModified
Unified diff
About Diff Checker
Diff Checker compares two versions of text and makes it easy to review what was added, removed, or changed. It is useful for developers reviewing code, writers checking revisions, and anyone comparing logs, configuration files, data, or documentation.
How to compare text
- Paste the original version on the left and the modified version on the right, or choose supported text files.
- Choose optional comparison settings such as ignoring case or whitespace.
- Click Compare to inspect the split or unified result.
- Switch precision to Word or Character when you need more or less inline detail.
Diff Checker FAQ
No. Text comparison and text-file reading happen locally in your browser. The tool does not upload the content to TechHost.
You can compare pasted text and supported text-based files such as TXT, Markdown, JSON, JavaScript, PHP, HTML, CSS, XML, YAML, SQL, CSV, and log files.
Word precision highlights changed words, while Character precision identifies the exact changed characters. Smart precision chooses a readable level of detail for each changed line.