Text Diff
Compare two blocks of text and see the differences highlighted.
How to Use Text Diff
- 1
Enter original text
Paste the original version of your text into the left (Original) input area.
- 2
Enter modified text
Paste the modified version into the right (Modified) input area.
- 3
Click Compare
The tool computes the diff and displays results with additions, deletions, and unchanged lines clearly marked.
- 4
Review differences
Scan the color-coded output — green for additions, red for deletions — to understand exactly what changed.
Key Features
Line-by-Line Diff
Compares text line by line and highlights additions, deletions, and unchanged content.
Color-Coded Output
Green highlights show added lines, red highlights show deleted lines, making changes easy to spot.
Instant Comparison
Results appear immediately after clicking Compare — no waiting for server processing.
Large Text Support
Handles large documents with hundreds or thousands of lines efficiently in your browser.
Common Use Cases
Code Comparison
Compare two versions of a file to see what changed between revisions without using a full version control tool.
Content Editing
Compare draft and final versions of articles, emails, or documents to review all edits at a glance.
Configuration Changes
Diff configuration files to identify which settings were changed between environments or deployments.
Frequently Asked Questions
How does the diff algorithm work?▾
The tool uses a longest common subsequence (LCS) algorithm to compute the minimal set of changes between the two texts, similar to how Unix diff and Git work.
Can I compare files?▾
This tool compares pasted text. Copy the contents of your files and paste them into the two input areas to compare.
Is my text sent to a server?▾
No. All comparison happens entirely in your browser. Your text never leaves your device.
Does it support word-level highlighting?▾
The current version highlights differences at the line level. Lines that differ are shown in their entirety as additions or deletions.