Text Difference Checker
Compare two texts and highlight additions and deletions — everything runs locally.
What this does & how to use it
Paste your original text on the left and the changed text on the right. Differences appear instantly and stay on your device.
- Inline view shows additions and deletions within lines.
- Side-by-side view compares entire lines next to each other.
- Switch modes or copy results without leaving the page.
Tip: large texts may take longer to compute depending on your device.
What this does & how to use it
Paste your original text on the left and the changed text on the right. Differences appear instantly and stay on your device.
- Inline view shows additions and deletions within lines.
- Side-by-side view compares entire lines next to each other.
- Switch modes or copy results without leaving the page.
Tip: large texts may take longer to compute depending on your device.
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Text Difference Checker — FAQ
Is my text sent to a server?
No. The diff runs entirely in your browser—nothing is uploaded.
Can I compare large files?
Yes, though very large texts may be slower depending on your device.
Does it support side-by-side view?
Yes. Switch between inline and side-by-side modes to view differences.
Is the comparison case-sensitive?
Yes, differences are case-sensitive.
Is the tool free?
Yes—100% free and ad-supported. No sign-up required.