Is my text safe and confidential on this Diff Checker?

Yes, absolutely. Unlike conventional online diff tools that upload your text to cloud servers, CleanWordCounter's diff engine executes 100% locally in your browser JavaScript memory. Zero lines of text or code leave your machine.

Can I compare legal contracts and NDAs with this tool?

Yes. Because our diff checker runs completely client-side without internet transmission, it is safe for non-disclosure agreements, legal drafts, medical records, and proprietary source code.

What do the green and red highlights mean?

Green highlights indicate text, words, or lines that were added to the modified version. Red highlights indicate content that was deleted or replaced from the original draft.

100% Local & Confidential Diff Engine

Private Text Diff Checker

Compare two texts, legal contracts, or code drafts side-by-side. Spot every addition, deletion, and edit with zero server telemetry.

Original Text (Draft 1) 0 words

Modified Text (Draft 2) 0 words

+0 additions

-0 deletions

Status: Identical

Comparison Diff Output

Added Deleted

Type or paste text into both panels above to see instant word-by-word difference highlights.

100% Client-Side Privacy

Zero data transmission. All string comparisons run locally in memory. Completely safe for legal agreements, confidential contracts, and medical transcripts.

Word & Character Granularity

Our Myers longest common subsequence (LCS) engine spots exact modified words and punctuation changes rather than just highlighting full lines blindly.

Contract & Revision Audits

Quickly catch sneaky clause changes, redlines, pricing edits, and sneaky wording shifts between two versions of any document.