New Tab Crypto

Replaces your new tab page with a page that hashes any text you type using SHA-256.

Runs on Chrome, Edge, Firefox · Manifest V3 · Surfaces: new tab, background service worker · Styling: CSS · Level: beginner

Create this project

npx extension@latest create my-newtab-crypto --template newtab-crypto
cd my-newtab-crypto
npm install
npm run dev

What it is for

  • Hashing text with the Web Crypto API inside an extension
  • A new tab page that does real work with no network
  • Reference for browser crypto primitives under MV3

First steps

  • Run npm run dev to launch the extension
  • Open a new tab and type any text to see its SHA-256 hash
  • Edit src/newtab/scripts.ts to hash with a different algorithm

Permissions it asks for

This template requests no permissions.

Source on GitHubDocumentation

extension.devDocumentation for extension.dev