How to Compare Text Files Online for Free — Diff Tool
Find differences between two text or code versions side by side with instant highlighted diffs — processed in your browser.
Compare Text Files Online — Free & Private
Find differences between two versions of text or code side by side — additions, deletions, and changes are highlighted instantly, all processed in your browser with no data sent to any server.
Comparing text manually is error-prone and time-consuming. This diff tool highlights every addition, deletion, and change between two versions of text or code instantly in your browser.
How to Compare Text Files Online
Step 1: Paste Your Original Text
Paste the original or older version of your text, code, or document into the left panel.
Step 2: Paste the Modified Text
Paste the new or revised version into the right panel for comparison.
Step 3: Click Compare
Press Compare. Lines added, removed, and changed are highlighted in green, red, and yellow respectively.
Step 4: Review Highlighted Differences
Scroll through the diff output to review every change. Use the navigation buttons to jump between differences.
Why Use This Diff Tool?
Completely Private
Your code and document text never leave your browser — safe for proprietary and confidential content.
Instant Diff
Differences appear immediately using a JavaScript diff algorithm running locally.
Line-Level Precision
Every added, removed, and modified line is highlighted with colour-coded indicators.
Compare Text Now — No Upload Required
Runs entirely in your browser — no upload, no account, no waiting.
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