Compare two texts online

Need to quickly spot the differences between two blocks of text? This free online text diff tool highlights every change line-by-line. Perfect for comparing drafts, config changes, copy edits, or any two strings. No file uploads, no sign-up — just paste and compare. Works entirely in your browser so your text stays private.

Features

• Instant line-by-line text comparison
• Side-by-side and inline views
• Ignore whitespace differences
• Ignore case differences
• Word wrap for long lines
• Share comparison via URL

Frequently asked questions

How do I compare two texts?

Paste the original text on the left and the modified text on the right. Differences are highlighted instantly — no buttons to click.

Can I ignore whitespace?

Yes — open Settings and toggle "Ignore whitespace" to focus on meaningful changes only.

Can I compare large texts?

Yes. The editor handles large documents efficiently with virtualized rendering.

Is this the same as diff on the command line?

Similar concept, but with a visual, color-coded UI instead of +/- markers. You can switch between side-by-side and inline views.

How do I find the difference between two strings?

Paste both strings into the editor — one on each side. Every character-level change is highlighted in green (additions) or red (deletions).

Can I compare two paragraphs?

Yes. Paste any text — paragraphs, sentences, documents, or code — and see differences instantly.

Is my text private?

Yes. viewdiff runs 100% in your browser. Your text is never uploaded to any server.

Can I share the comparison?

Yes — click Share to get a URL that anyone can open to see the same diff.

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