About Vigenère Cipher
Vigenère Cipher is a free, fast and reliable online tool. Encrypt/decrypt with the Vigenère cipher. It supports 2 options: Encrypt and Decrypt. Everything runs locally in your browser — no files are uploaded and no data is stored, keeping your information completely private. It works responsively on both desktop and mobile devices.
How to use Vigenère Cipher
- 1 Enter Key, Text and Mode
- 2 Click "Convert"
- 3 Review the result and click "Copy"
Frequently asked questions
Which options does Vigenère Cipher support?
It supports 2 options: Encrypt and Decrypt.
Is Vigenère Cipher free to use?
Yes — Vigenère Cipher is a free online tool. No sign-up or login is required, and there are no hidden charges or usage limits.
Do I need to create an account to use Vigenère Cipher?
No. Vigenère Cipher runs entirely online in your browser — there is no account to create, no login, and nothing to install.
Does Vigenère Cipher upload my data?
No. Everything runs locally in your browser. Your input never leaves your device, is never stored, and is never tracked, so it stays private.
Free, online, and private
Free to use
Vigenère Cipher is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.