Compare Text Online – Free & Private
DiffLab's text comparison tool highlights word, character and line differences. Text paste is fully local; file parsing uses CDN libraries but your files are never uploaded.
Drag & drop .txt, .docx, .xlsx, .pdf files
Drag & drop .txt, .docx, .xlsx, .pdf files
Differences
Paste two texts to compare
Why DiffLab?
No Uploads
Pasted text is processed locally. File parsing loads libraries from CDN, but your files are never sent to any server.
Instant Results
Differences appear as you type. No waiting, no loading screens.
Three Precision Levels
Compare by line, word, or character to find exactly what changed.
How It Works
1
Paste Your Texts
Enter or drag-drop your original and compared text into the two boxes.
2
View Differences
Red marks removed content, green marks added content — all in real time.
3
Copy & Use
Copy the marked-up result to your clipboard for use anywhere.
Frequently Asked Questions
How do I compare two texts for differences?
Paste your original text in the left box and the new text in the right box. DiffLab highlights removed parts in red and added parts in green instantly. Everything runs in your browser.
Is DiffLab text compare free?
Yes, completely free, no sign-up, no limits, and no ads.
Is my text or file uploaded to a server?
No. Pasted text is processed entirely in your browser. For file uploads (.docx, .xlsx, .pdf), parsing libraries are loaded from a CDN, but your actual file content is never sent to or stored on any server.
Can I compare by word or character instead of line?
Yes. Use the mode switch to compare at line, word or character granularity.