Online Text Diff & Comparison Tool

Find differences between two versions of text with visual color-coded additions, deletions, and inline modifications.

100% Client-Side — your text never leaves this browser. Works offline. How it works

0 lines • 0 bytes
Results update as you type
0Words
0Characters
0Chars (No Spaces)
0Sentences
0Paragraphs
0.0 minReading Time
0.0 minSpeaking Time
Your text
Counts update as you type
1

Social media limits

Top keywords

Type or paste text to see keyword frequency
About this tool

About the Text Diff

Compare two text files or snippets side-by-side. Highlight additions, deletions, and inline word changes with fast in-browser diffing.

Visual Change Highlighting

Color-coded diff clearly marks added lines (green), removed lines (red), and modified lines (amber).

Word & Line Comparison

Identifies differences down to individual words and characters across lines.

One-Click Swap & Clear

Swap left and right inputs easily to reverse comparison perspective.

Private & Secure

Compare confidential contracts, legal drafts, and proprietary code without exposing them to remote servers.

FAQ

Common questions

How does text diffing work?

It calculates the Longest Common Subsequence (LCS) between the original and modified documents to determine exact insertions and deletions.

What do the diff colors indicate?

Green highlights content added in the modified document, red represents deleted text, and amber indicates modified lines.

Can I compare code snippets or prose?

Yes! Text Diff works seamlessly on plain text, Markdown, code snippets, CSV files, and config files.

Is there any character limit for diffing?

No, comparison runs in your local browser memory and can comfortably diff long essays, documentation pages, or log files.

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