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Text Diff Tool: Compare Two Texts & Spot Changes Instantly
Tooly · 2026-08-02 · 5 min read
A client sends back an edited contract. A teammate rewrote your README. Your essay draft v3 vs v7 — what actually changed? A text diff tool answers that in seconds, highlighting exactly what was added, removed, or altered. No signup, nothing uploaded.
What a text diff does
- Side-by-side or inline comparison — paste both versions
- Highlighted changes — added and removed lines marked clearly
- Instant results — no upload, no processing queue
- Works for code too — configs, scripts, and markdown
Compare texts free with Tooly
The Tooly Text Diff Tool makes it painless:
- Paste the original and the edited version
- See exactly what changed with clear highlighting
- Perfect for drafts, contracts, and code reviews
- 100% client-side — nothing is uploaded
When you'll use it
- Reviewing client edits to contracts and proposals
- Checking what changed in a document before signing
- Diffing config files and code between environments
- Tracking your own edits across essay or article drafts
Best practices
- Diff before signing anything — spot silent changes fast
- Use it on code to verify a merge only changed what you expected
- Pair with the Word Counter to track length changes too
- For writing, the Case Converter fixes formatting after edits
Frequently Asked Questions
Is this text diff tool really free? Yes — unlimited comparisons, no account, no watermark.
Does it handle large documents? Yes — it processes in your browser, handling long contracts and files fine.
Is my text uploaded? No — comparison runs entirely in your browser, so your drafts and contracts stay on your device.
Can it diff code? Yes — code, configs, and markdown all work; it highlights changed lines clearly.
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