About Text Compare

Fast, private text comparison that runs entirely in your browser.

🐕

Why Nobu Tools?

Nobu is my dog, and the inspiration behind these tools. Life is short — we should spend less time on tedious tasks and more time with the ones we love.

Nobu Tools are built to save you time. Fast, private, no-nonsense utilities that just work — so you can get back to what matters.

🔒 Privacy First

Your text stays yours. Everything runs locally in your browser using WebAssembly:

No text is ever sent to any server — your documents stay on your device
No data is logged or stored — we can't see what you compare
Works completely offline — once loaded, no internet needed
Compare up to 1 million characters — handle large documents with ease

⚡ How It Works

Text Compare uses a high-performance diff engine written in Rust and compiled to WebAssembly. It implements multiple professional-grade algorithms:

Algorithms

Patience (default) — Best for most text. Produces clean, readable diffs.
Myers — Classic diff algorithm. Fast and efficient.
LCS — Finds more granular differences for detailed analysis.

Comparison Modes

Word-level — Compares whole words. Best for documents.
Character-level — Shows exact character differences. Great for typos.
Line-level — Highlights entire lines. Fast for large files.

Views

Side-by-side — Original and modified in parallel panels.
Unified — Git-style diff with inline additions/deletions.

💼 Use Cases

✍️

Writers & Editors

Track revisions between drafts. See exactly what changed.

👨‍💻

Developers

Compare config files, API responses, or code snippets.

⚖️

Legal Professionals

Compare contract versions to identify changed terms.

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QA & Testing

Compare expected vs actual output.

⌨️ Keyboard Shortcuts

Ctrl+Enter — Run comparison
J or ← — Previous difference
K or → — Next difference

❓ FAQ

Is my text sent to a server?

No. All comparison happens locally. Your text never leaves your device.

What's the maximum text size?

1,000,000 characters per side — roughly 500 pages.

Does it work offline?

Yes! Once loaded, no internet connection required.

Ready to Compare?

Try Text Compare now — no signup required

Start Comparing →