https://github.com/iktakahiro/whoami

Firebase Authentication JWT id Token Viewer
https://github.com/iktakahiro/whoami

firebase firebase-auth jwt nextjs react

Last synced: about 2 months ago
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Firebase Authentication JWT id Token Viewer

• Host: GitHub
• URL: https://github.com/iktakahiro/whoami
• Owner: iktakahiro
• License: mit
• Created: 2022-12-15T08:32:18.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2022-12-20T12:06:18.000Z (over 3 years ago)
• Last Synced: 2025-09-08T15:57:20.253Z (10 months ago)
• Topics: firebase, firebase-auth, jwt, nextjs, react
• Language: TypeScript
• Homepage:
• Size: 854 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Who am I - Firebase ID Token Viewer

* This application prints the tokens generated by Firebase Authentication in readable format.

* ID tokens are only decoded, not verified.

* Email or password you entered will never be sent to any outside network except Firebase.

* This is a developer tool. Do not use for your end users.

![screenshot-full](./docs/id-token-cheker-screenshot-full.png)

## Getting Started

### 1. Create a new .env.local file

```bash

cp .env.example .env.local

```

### 2. Set environments

```env

NEXT_PUBLIC_FIREBASE_API_KEY=

NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=

NEXT_PUBLIC_FIREBASE_DATABASE_URL=

NEXT_PUBLIC_FIREBASE_PROJECT_ID=

NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=

NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=

NEXT_PUBLIC_FIREBASE_APP_ID=

```

* https://firebase.google.com/docs/web/setup

### 3. Run npm commands

```bash

npm i

npm run dev

```

### 4. Open your web browser localhost:3000

![screenshot-open](./docs/id-token-cheker-screenshot-open.png)

### 5. Enter your email and password

![screenshot-input](./docs/id-token-cheker-screenshot-input.png)

### 6. View details of a generated id token

![screenshot-result](./docs/id-token-cheker-screenshot-result.png)