PhotoBlock provides user-friendly visual single sign-on for websites and blockchains

Photo + Emojis + OAuth + Blockchain = PhotoBlock

How PhotoBlock Works?

PhotoBlock works with a photo you provide (any JPEG will do) and your personal emoji sequence called an EmojiKey. The photo is transformed into a downloadable PhotoBlock file with embedded accounts for Web, Bitcoin and Ethereum (the three platforms currently supported). You can then use your PhotoBlock with your EmojiKey to unlock and access the accounts anywhere PhotoBlock is integrated.

PhotoBlock can be added to any dapp or website by a developer in just a few minutes, making it easy for users to authenticate and access the dapp/website without the hassle of usernames, passwords, private keys, mnemonic passphrases and generally everything that users dislike. Developers can focus on building awesome apps for their users — PhotoBlock does the rest!

PhotoBlock ALPHA Release Notes

PhotoBlock is a free, Open Source (MIT License) library for use on websites and dapps. It combines user accounts, two-factor authentication and message signing into a unified user experience. In this Alpha Release, you can create PhotoBlocks, then use them for Web, Bitcoin, Ethereum, Harmony and Klaytn. Development is ongoing and documentation/technical white paper are also in progress.

For more information, head on over to the TryCrypto website or view the source code.


Use the same PhotoBlock with any supported blockchain.


Works with dapps and websites on most popular mobile browsers.

Easy to Use

Photos and emojis — everybody knows how to use them.

Secure & Private

Designed with focus on security and privacy.


No passwords, private keys or mnemonic passphrases to save.

Use Anywhere

Use cloud file-sharing to access your PhotoBlocks everywhere.