FREEText Compare · no signup, unlimited

Free text compare & diff

Paste two versions of any text to instantly see what changed — added and removed lines highlighted side by side, with a similarity score. Everything runs privately in your browser.

No signupFree forever

Text Compare

Line diff · similarity score

ORIGINAL

CHANGED

RESULT

IDLE

Nothing to compare yet

Paste two versions and hit Compare, or load the example.

WHY TEXTSIGHT

See every change at a glance

Line-by-line diff

Added lines glow green, removed lines red — so edits between two drafts are obvious instantly.

Similarity score

A clear percentage (Jaccard index) tells you how alike the two texts really are.

Private & instant

Comparison happens locally — paste contracts, code or essays without anything being uploaded.

Need to know which version reads as AI?

Send either draft to the free AI Detector & Humanizer.

Check for AI

FAQ

Text compare questions

How does the diff work?

We align the two texts line by line using a longest-common-subsequence algorithm, then mark lines that only appear in the original as removed and lines only in the changed version as added. Unchanged lines are shown for context.

What is the similarity score?

It's the Jaccard index over the set of words in both texts — the size of the shared vocabulary divided by the combined vocabulary, shown as a percentage. 100% means identical wording; 0% means no words in common.

Can I compare code?

Yes. The diff is line-based and language-agnostic, so it works for code, prose, JSON, CSV — anything text.

Is there a size limit?

No. Text Compare is free forever with no limit and no signup.

Is my text stored?

No — the comparison runs entirely in your browser and nothing is sent to a server.

Does it work on mobile?

Yes, the layout stacks cleanly on phones and tablets.