Code Diff

Paste original and changed code to review additions and removals in a two-column diff view. Side-by-side line diff for code snippets and config files.

Introduction

Code Diff Viewer is a free, browser-based utility in our Code Tools collection. Paste original and changed code to review additions and removals in a two-column diff view. Code Diff Viewer provides a side-by-side line comparison for snippets so you can review edits without leaving the browser. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include side-by-side layout.

Features

Side-by-side layout
Line-level add/remove highlighting
Works for any text/code
Local-only comparison

How to use

1
Paste original code on the left and changed code on the right.
2
Scroll the highlighted diff grid below.

Example

Function change

Input

add(a,b) vs add(a,b,c)

Output

Highlighted changed lines

Benefits

Run Code Diff entirely in the browser with no signup or installation.
Keep sensitive sample data private — processing never leaves your device.
Side-by-side layout
Line-level add/remove highlighting
Works for any text/code
Pair it with Text Diff and Find & Replace when your workflow needs adjacent utilities.

FAQs

No - it compares whole lines.

No.

This view emphasizes a two-column code review layout; Text Diff is a unified list.

Yes. Code Diff on EverydayDevTools is free, with no account, watermarks, or usage caps for normal interactive use.

No. Code Diff runs in your browser. Your input is processed locally and is not sent to EverydayDevTools servers.

Paste original and changed code to review additions and removals in a two-column diff view. It fits everyday code tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.

Core capabilities include: Side-by-side layout; Line-level add/remove highlighting; Works for any text/code; Local-only comparison.

Developers often pair Code Diff with Text Diff, Find & Replace, Code Minifier. Open Related tools on this page for quick links.