Compare two texts and find differences with line-by-line comparison. Perfect for code review, document comparison, and tracking changes.
Original Text
Modified Text
Lines Added
0
Lines Removed
0
Lines Changed
0
Unchanged
0
Diff Result
AddedRemovedChanged
Enter text in both fields and click Compare to see differences
Copied!
Legal Disclaimer / Yasal Uyarı: This tool compares text locally in your browser. No text is sent to any server. / Bu araç metni tarayıcınızda yerel olarak karşılaştırır. Hiçbir metin sunucuya gönderilmez.
What the Text Diff Checker Does and Why It Matters
The Text Diff Checker compares two pieces of text line by line and highlights what was added, removed, or changed, in your browser. It also reports statistics so you can see how much differs at a glance.
This matters whenever two versions need reconciling — comparing drafts, spotting an edit someone made, or checking that a copy matches the original. Reading two blocks side by side by eye is unreliable; a diff makes every change obvious.
How to Use Text Diff Checker
Paste the original text into the first box.
Paste the version you want to compare into the second box.
Run the comparison to highlight differences line by line.
Review the added, removed, and changed lines and the summary statistics.
Supported Inputs and Limitations
What you provide
Two blocks of text to compare
What you get
A line-by-line highlight of additions, deletions, and changes
Character-level highlighting inside changed lines (on by default) showing exactly which characters were added or removed
Summary statistics on how much differs
Known limitations
It compares text, not the rendered formatting of documents.
Very large inputs depend on browser memory.
When the character-level diff option is turned off, a whole line is flagged as changed even when only part of it differs.
Privacy and Security
The comparison runs entirely in your browser. Both texts are processed on your device and are never sent to NovaTools or any external service.
Frequently Asked Questions
Can it compare code?
Yes. Any plain text works, including source code, since the diff is line based and language agnostic.
Does it show character-level changes?
Yes. When the character-level diff option is enabled (it is on by default), the tool highlights the specific characters that were added or removed within a changed line.
Is my text uploaded?
No. Both inputs are compared locally and never leave your browser.
Our free Text Diff Checker helps you compare two versions of text and identify exactly what has changed. Whether you're reviewing code changes, comparing document versions, or tracking edits, this tool provides a clear visual diff with line-by-line comparison.
How to Use
Paste your Original Text in the left input area.
Paste your Modified Text in the right input area.
Choose comparison options: ignore whitespace, ignore case, or character-level diff.
Click Compare Texts to generate the diff.
Review the statistics showing lines added, removed, changed, and unchanged.
Examine the highlighted differences in the result panel.
Use Copy Diff Result to copy the comparison.
Features Explained
Line-by-Line Comparison: Each line is compared individually to identify additions, deletions, and modifications. Character-Level Diff: When enabled, shows exactly which characters changed within modified lines. Ignore Whitespace: Disregards spaces, tabs, and line breaks when comparing. Ignore Case: Treats uppercase and lowercase letters as identical. Statistics: Get a quick overview of how much content changed.
Common Use Cases
Code Review: Compare different versions of code to see what changed. Document Tracking: Track edits in legal documents, contracts, or creative writing. Content Management: Verify changes made by editors or collaborators. Configuration Files: Compare before and after states of config files.
Frequently Asked Questions
Is my text sent to a server?
No. All comparison happens entirely within your browser. Your text is never transmitted to our servers or stored anywhere.
What's the maximum text size?
The tool can handle thousands of lines of text. However, extremely large texts (100,000+ lines) may impact browser performance.
How does character-level diff work?
When enabled and two lines differ, the tool highlights specific characters that were added (green) or removed (red with strikethrough) within those lines.
Can I compare binary files?
No, this tool is designed for text comparison only. Binary files should use specialized binary diff tools.
Does it support all Unicode characters?
Yes! The diff tool fully supports Unicode text including special characters, emoji, and non-Latin scripts.
Recommended next reading
Use these practical guides to understand when this tool is the right choice, what to check before exporting, and which workflow usually comes next.
