Text Compare Tool — Spot Differences Instantly
Paste two versions of any text, code, or document and instantly see every addition, deletion, and change highlighted line-by-line. Perfect for proofreading, code review, contract edits, and version control. No login. No uploads.
⚡ Comparison runs entirely in your browser. Zero data stored.
What is the Text Compare Tool?
The Text Compare Tool by WorldOfTools is a free, browser-based diff checker that lets you compare two pieces of text — documents, code, JSON, contracts, essays, or any plain text — and instantly highlights every difference. Whether you need to spot edits between two draft versions, review code changes, or verify a contract revision, this tool shows you exactly what changed.
All processing happens 100% in your browser using JavaScript. Your text is never sent to any server, never stored, and never logged. It works offline too.
How to Use the Text Compare Tool — Step by Step
Paste Original Text — Add your first version in the left panel. Use the Paste button or type directly.
Paste Modified Text — Add the updated version in the right panel.
Set Options — Choose to ignore case, extra spaces, or hide unchanged lines as needed.
Click Compare — Instantly see line-by-line and word-level diffs, with summary statistics.
Frequently Asked Questions
How does the text compare tool work?
Paste your original text in the left panel and the modified version in the right, then click Compare. The tool performs a line-by-line diff and highlights added lines in green, removed lines in red, and unchanged lines in grey.
Can I compare code or JSON?
Yes. This tool handles any plain text — HTML, CSS, JavaScript, Python, JSON, SQL, XML. Paste your code directly and compare syntax changes, added functions, or removed blocks instantly.
What does "Word Diff" mode do?
Word Diff mode goes deeper than line comparison — it shows exactly which words within a changed line were added or removed, giving you finer granularity for text edits.
Is my text stored or uploaded?
No. All comparison logic runs entirely in your browser using JavaScript. Your text is never sent to any server, never stored in a database, and never shared.
Can I compare two large documents?
Yes. The tool handles large texts efficiently. For very large files (tens of thousands of lines), processing may take a moment, but results remain accurate.