About This Tool
The Atbash cipher originated from ancient Hebrew and is a simple monoalphabetic substitution cipher. It works by completely reversing the alphabet: A becomes Z, B becomes Y, C becomes X... and so on. Since it's symmetric, encryption and decryption use the same algorithm. This tool also supports digit reversal (0↔9). All processing is done locally in your browser.
FAQ
Is this tool free?
Yes, completely free. This tool is part of Free ToolBase. All features are available without registration or payment.
Is my data uploaded to a server?
No. All processing is done entirely in your browser. Your input data is never uploaded to any server, ensuring complete privacy.
Which browsers are supported?
All modern browsers including Chrome, Firefox, Safari, and Edge. Use the latest version for the best experience.
Can I use it on mobile?
Yes. This tool is fully responsive and works on phones and tablets.