Text & Code Diff Checker
Compare the added, deleted and modified lines between two texts or code blocks.
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Text and code comparison tool
See the changes side by side with line-based diff analysis.
| Original text | New text |
|---|
Text & Code Diff Checker features
The essential tools you need to easily detect changes in text and code.
Line-based comparison
Analyzes both contents line by line and shows the differences side by side.
Added lines
Marks the lines added in the new text separately.
Deleted lines
Quickly finds the lines removed from the original text.
Modified lines
Matches line changes at similar positions on a single line.
Flexible comparison
You can ignore whitespace or uppercase/lowercase differences.
Copy and download
Copy the diff output to the clipboard or download it as a TXT file.
What is Diff Checker?
Diff Checker is a comparison tool that detects the differences between two texts, documents or code blocks. The tool analyzes added, deleted, modified and unchanged lines separately.
Software developers use diff tools for code review, version comparison, configuration file checks, SQL query analysis and detecting changes in API output.
Text comparison tools can be used not only for code but also for different kinds of content such as contracts, technical documents, content revisions, reports and translated texts.
How does line-based comparison work?
The two texts are split into lines and the line sequences are compared. Matching lines are marked as unchanged, while lines that exist on only one side are shown as added or deleted. Different lines at similar positions can be matched as a modified line.
How do you use Text & Code Diff Checker?
Add the original text
Paste the first version of the comparison into the left field.
Add the new text
Paste the new or modified version into the right field.
Compare
Click the Compare button to start the diff analysis.
Use the result
Review the changes, copy them or download them.
The difference between Text Diff and Code Diff
| Feature | Text Diff | Code Diff |
|---|---|---|
| Main purpose | Viewing revisions in text content | Analyzing source code changes |
| Common use | Documents, contracts, articles, reports | JavaScript, C#, SQL, JSON, XML, CSS |
| Important types of differences | Word, sentence and paragraph changes | Line, syntax and structure changes |
| Whitespace sensitivity | Usually low | Can be important depending on the language and purpose |
| Support in this tool | Line-based comparison for text and code content | |
Where is Diff Checker used?
Code review
Check the changes between two versions of source code.
JSON and XML
Detect line differences in configuration or data files.
SQL queries
Compare query revisions and condition changes.
Technical documents
Find additions and deletions between document versions.
Contract review
Review text revisions and modified clauses.
Content revision
Compare versions of articles, descriptions and reports.
Diff output example
function calculateTotal(items) {
- return items.reduce((sum, item) => sum + item.price, 0);
+ return items.reduce((sum, item) => sum + (item.price * item.quantity), 0);
}A minus sign represents a removed line, a plus sign an added line, and a blank marker an unchanged line.