Text Diff & Compare
Compare two texts and highlight the differences.
About This Tool
Text Compare is a free online diff tool that shows the exact differences between two versions of any text. Paste your original and modified content into the side-by-side panels, and the tool instantly highlights every addition in green and every deletion in red — line by line. It is ideal for proofreading, code review, document versioning, and content auditing.
The comparison algorithm runs entirely in your browser. Nothing is uploaded, nothing is stored. Text Compare handles any plain-text content — prose, source code, configuration files, JSON, CSV, markdown, or log output — and works equally well for a two-sentence change or a thousand-line document diff.
Text Compare is commonly used by writers to review edited drafts, developers to spot changes between config versions, and content teams to audit webpage copy before and after updates. The diff summary at the top of the result gives an at-a-glance count of added, deleted, and unchanged lines.
How to Use
- 1
Paste your original text into the left panel.
- 2
Paste the modified text into the right panel.
- 3
View the highlighted differences — additions in green, deletions in red.
- 4
Check the summary counts for added, deleted, and unchanged lines at the top.
- 5
Edit either panel to refine the text and watch differences update in real time.
Features
Line-by-Line Diff
Compares texts line by line and clearly highlights additions, deletions, and unchanged content.
Color-Coded Results
Additions are shown in green and deletions in red for easy identification.
Diff Statistics
See a summary count of added, deleted, and unchanged lines at a glance.
Privacy First
All comparison happens locally in your browser. No text is sent to any server.
Common use cases
- ›Compare two versions of a document or essay to review editorial changes.
- ›Diff configuration files or environment variables to spot unintended changes.
- ›Verify that a translated or edited piece of content has the expected modifications.
- ›Audit webpage copy before and after content updates for SEO or compliance review.
FAQ
How does text comparison work?
It compares texts line by line and highlights additions, deletions, and unchanged lines.
Can I compare large texts?
Yes, it works with texts of any size, though very large texts may take a moment to process.
Can I use it to compare code files?
Yes, Text Compare works with any plain text including code, JSON, CSV, and configuration files. Paste the two versions into each panel.
Is my text stored or sent anywhere?
No. All comparison runs locally in your browser using JavaScript. Nothing is transmitted to any server.
What do the colors mean?
Green highlights are lines that were added in the modified version. Red highlights are lines that were removed from the original. Grey lines are unchanged.