Caesar Cipher / ROT13
Caesar cipher with adjustable shift — ROT13 preset
🔒 Files never leave your browser
Mode:
0 25
Presets:
How to Use Caesar Cipher / ROT13
Enter text
Type or paste text to encrypt/decrypt.
Set shift
Adjust the shift value or use ROT13.
Copy
Copy the shifted output.
Why Choose AllTools Caesar Cipher / ROT13?
- ✓ 100% free, no account needed
- ✓ Adjustable shift 0-25
- ✓ ROT13 preset
- ✓ Encrypt/decrypt toggle
- ✓ Preserves non-alpha chars
- ✓ No data stored or transmitted
Why Use This Tool
- ★ No data leaves your browser — text stays private on your device
- ★ Real-time processing with instant results
- ★ No account or sign-up required
- ★ Completely free with no character or word limits
- ★ Works on any device with a modern browser
Related Resources
Frequently Asked Questions
What is ROT13? ▼
A Caesar cipher with shift 13. Applying it twice returns the original text.
Is this private? ▼
Yes. All processing happens in your browser.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
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