🛠 Secure TXT Converter (Undo/Redo)
✅ No upload – 100% private • ✅ Undo/Redo (50 steps) • ✅ DOMPurify safe preview
📂 Drag & drop a file (.txt, .html, .json, .csv, .xml) or click to select
📄 Format conversions:
🔐 Encode / Decode:
Ready
✨ Why this converter is better
- 🔒 No upload – Everything runs locally. Your data never leaves your device.
- 💰 Free, unlimited – No signup, no file size limits.
- ↩️ Undo / Redo history – Go back up to 50 steps. No more lost work.
- 🛡️ DOMPurify + sandboxed iframe – Safe HTML preview, scripts are removed.
- 🔄 12+ conversions – TXT ↔ HTML / JSON / CSV / XML + Base64 + URL.
- 📂 Drag & drop – Open any text file instantly.
- 🖼️ Live HTML preview – See rendered HTML right away (sandboxed).
- 🌙 Dark mode – Easy on the eyes, remembers your choice.
Most other converters upload your data to their servers. This tool never sees your text – it's private by design.
📊 How we compare
| Feature | Our tool | Convertio / others |
|---|---|---|
| 💰 Price | Free forever | Freemium / limits |
| 🔐 Privacy | Local only – no upload | Files go to their cloud |
| ↩️ Undo/Redo | ✅ Yes (50 steps) | ❌ No |
| 🛡️ Sanitization | DOMPurify + sandbox | Weak or none |
| 📱 Mobile friendly | ✅ Fully responsive | Often breaks |
| 🖼️ Live preview | ✅ Built‑in (sandboxed) | Rarely available |
📖 How to use
- Paste or drop your text – Type, paste, or drag any text file.
- Click a conversion button – For example, “TXT → HTML”.
- Use Undo/Redo – Made a mistake? Press Undo to go back.
💡 Auto‑detect – The tool figures out if your input is JSON, CSV, XML/HTML, or plain text and converts it smartly.
❓ Frequently asked questions
🔸 Is it really free?
Yes, completely free. No hidden payments.
Yes, completely free. No hidden payments.
🔸 Does it work offline?
Yes. Once the page loads, you can disconnect from the internet and it still works.
Yes. Once the page loads, you can disconnect from the internet and it still works.
🔸 Can I convert JSON or CSV files?
Yes – drag your file and click “JSON → TXT” or “CSV → TXT”.
Yes – drag your file and click “JSON → TXT” or “CSV → TXT”.
🔸 What is Undo/Redo?
Every conversion is saved. Press Undo to go back to previous results (up to 50 steps).
Every conversion is saved. Press Undo to go back to previous results (up to 50 steps).
🔸 How is the preview kept safe?
We use DOMPurify to strip all scripts and event handlers, plus a sandboxed iframe with no access to the parent page.
We use DOMPurify to strip all scripts and event handlers, plus a sandboxed iframe with no access to the parent page.