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Randomizers, Decisions & Everyday

Coin Flip.

Files, text, passwords, tokens and results remain in this browser. Flip one or many virtual coins using cryptographic randomness. Uses explicit bounds and independent local verification.

Use Coin Flip

Private in this browser. No network request, localStorage, IndexedDB or OPFS is used for operation data.

Tool options
Preparing the local tool…

How it works

  1. 01

    Enter bounded data or choose a local file.

  2. 02

    Set the disclosed options and run the operation.

  3. 03

    Review the independently verified result and limitations.

Frequently asked questions

Is the result a security certificate?

No. It covers only the disclosed local operation and its independent checks.

Does Coin Flip upload my data?

Coin Flip runs locally in your browser. No network request, localStorage, IndexedDB or OPFS is used for operation data.

What output does Coin Flip create?

Coin Flip creates Json output after the result passes its local verification checks.

Local File EncryptorEncrypt one or more files with authenticated encryption and a user passphrase. Uses explicit bounds and independent local verification.Local File DecryptorDecrypt files produced by the site after user supplies the correct passphrase. Uses explicit bounds and independent local verification.Password GeneratorGenerate passwords or passphrases locally using cryptographic randomness. Uses explicit bounds and independent local verification.
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