Text Diff

Paste original and changed text to see a clear line-level diff. Optionally ignore whitespace differences while reviewing edits.

Introduction

Text Diff Checker is a free, browser-based utility in our Text Tools collection. Paste original and changed text to see a clear line-level diff. Optionally ignore whitespace differences while reviewing edits. Compare two text versions and highlight added and removed lines with an LCS-style diff. Handy for reviewing copy edits, configs, and small code snippets. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include line-by-line comparison.

Features

Line-by-line comparison
Added and removed line highlighting
Ignore whitespace option
Live diff stats

How to use

1
Paste the original text on the left and the changed text on the right.
2
Review highlighted additions and removals in the diff panel.
3
Enable Ignore whitespace if spacing-only changes should be skipped.

Example

Changed line

Input

Hello
Old line
End

Output

Hello
+ New line
− Old line
End

Benefits

Run Text Diff entirely in the browser with no signup or installation.
Keep sensitive sample data private — processing never leaves your device.
Line-by-line comparison
Added and removed line highlighting
Ignore whitespace option
Pair it with Find & Replace and Whitespace Remover when your workflow needs adjacent utilities.

FAQs

This tool compares by line. Whole lines are marked as added or removed when they differ.

No. Diffing runs entirely in your browser.

It trims and collapses whitespace before comparing lines so formatting-only changes are ignored.

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

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

Paste original and changed text to see a clear line-level diff. Optionally ignore whitespace differences while reviewing edits. It fits everyday text tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.

Core capabilities include: Line-by-line comparison; Added and removed line highlighting; Ignore whitespace option; Live diff stats.

Developers often pair Text Diff with Find & Replace, Whitespace Remover, Word Counter. Open Related tools on this page for quick links.