Simple OAuth2 Client

Tracking since Apr 23, 2026.

Changelog

• May 15, 2026
  description

  With this extension, you can get an access token without prepare an application or server to catch for OAuth2 redirection.
  
  ---------
  Usage
  ---------
  - Click extension icon to open SidePanel (or Open developer tools and select Simple OAuth2 Client tab)
  - Fill each config sections
  - Copy "redirect_uri" from Client Config section and paste it to "Redirect URIs" in your OAuth2 app setting page
  - Click "Start Auth" button
  
  -----------------
  How it works
  -----------------
  
  1. By clicking StartAuth button, the extension open authorization url with required params.
  2. You will be asked to sign-in to that platform and to allow access to scopes you input. 
  3. Then Chrome accesses "redirect_uri" but not really open.  By using launchWebAuthFlow API in Chrome your redirect securely catch by chrome themselves.
  4. The extension get authorization code and exchange it to access token and show it to you!
  
  ---------------------------
  Supported Features
  ---------------------------
  
  - Specify any url for authorization and token endpoint
  - Public and confidential client
  - PKCE(S256 and plain) and non-PKCE request
  - Authorization Header and Body Parameter for token request authorization

  With this extension, you can get an access token without prepare an application or server to catch for OAuth2 redirection.
  
  -----------
  Usage
  -----------
  
  1. Click the extension icon to open the Side Panel (or open DevTools and select the "Simple OAuth2 Client" tab)
  2. Fill in each config section — or let AI Assist auto-detect values from the page
  3. Copy the redirect_uri from the Client Config section and register it in your OAuth2 app settings
  4. Click "Start Auth"
  
  -----------------
  How it works
  -----------------
  
  1. By clicking StartAuth button, the extension open authorization url with required params.
  2. You will be asked to sign-in to that platform and to allow access to scopes you input. 
  3. Then Chrome accesses "redirect_uri" but not really open.  By using launchWebAuthFlow API in Chrome your redirect securely catch by chrome themselves.
  4. The extension get authorization code and exchange it to access token and show it to you!
  
  ---------------------------
  Supported Features
  ---------------------------
  
  - Specify any url for authorization and token endpoint
  - Public and confidential client
  - PKCE(S256 and plain) and non-PKCE request
  - Authorization Header and Body Parameter for token request authorization
  - AI Assist: automatically detects OAuth settings (client ID, scopes, endpoints) from the current page using Chrome's built-in AI

• May 15, 2026
  permissions

  identity, clipboardWrite, sidePanel

  identity, clipboardWrite, sidePanel, scripting

• Apr 23, 2026
  description

  With this extension, you can get an access token without prepare an application or server to catch for OAuth2 redirection.
  
  ---------
  Usage
  ---------
  - Open developer tools
  - Click the Simple OAuth2 Client tab
  - Fill each config sections
  - Copy "redirect_uri" from Client Config section and paste it to "Redirect URIs" in your OAuth2 app setting page
  - Click "Start Auth" button
  
  -----------------
  How it works
  -----------------
  
  1. By clicking StartAuth button, the extension open authorization url with required params.
  2. You will be asked to sign-in to that platform and to allow access to scopes you input. 
  3. Then Chrome accesses "redirect_uri" but not really open.  By using launchWebAuthFlow API in Chrome your redirect securely catch by chrome themselves.
  4. The extension get authorization code and exchange it to access token and show it to you!
  
  ---------------------------
  Supported Features
  ---------------------------
  
  - Specify any url for authorization and token endpoint
  - Public and confidential client
  - PKCE(S256 and plain) and non-PKCE request
  - Authorization Header and Body Parameter for token request authorization

  With this extension, you can get an access token without prepare an application or server to catch for OAuth2 redirection.
  
  ---------
  Usage
  ---------
  - Click extension icon to open SidePanel (or Open developer tools and select Simple OAuth2 Client tab)
  - Fill each config sections
  - Copy "redirect_uri" from Client Config section and paste it to "Redirect URIs" in your OAuth2 app setting page
  - Click "Start Auth" button
  
  -----------------
  How it works
  -----------------
  
  1. By clicking StartAuth button, the extension open authorization url with required params.
  2. You will be asked to sign-in to that platform and to allow access to scopes you input. 
  3. Then Chrome accesses "redirect_uri" but not really open.  By using launchWebAuthFlow API in Chrome your redirect securely catch by chrome themselves.
  4. The extension get authorization code and exchange it to access token and show it to you!
  
  ---------------------------
  Supported Features
  ---------------------------
  
  - Specify any url for authorization and token endpoint
  - Public and confidential client
  - PKCE(S256 and plain) and non-PKCE request
  - Authorization Header and Body Parameter for token request authorization

• Apr 23, 2026
  permissions

  identity, clipboardWrite

  identity, clipboardWrite, sidePanel

Permissions & access

Permissions

identityclipboardWritesidePanelscripting

Host access

<all_urls>

Screenshots

Similar extensions

Alternatives to Simple OAuth2 Client, ranked by description similarity.

Access Token Grabber

Access Token Grabber - One‑click JWT tokens from Dev-Tools for faster API testing (Open-source)

1.0K

★ 3.8

RedirectPilot: OAuth

Redirect OAuth callback navigation from domains to local URLs.

10

★ 5.0

Google Labs & Sora Token Extractor

Extracts session tokens from Google Labs and Sora.

1.0K

Manual OAuth Code Catcher

Developer tool for capturing OAuth authorization codes from local redirect URIs during out-of-band OAuth flows.

7

Easy Token - Copy Web Tokens

One-click copy tokens from web pages. Extract from localStorage, URL parameters, form inputs, and more.

14

Profile Auth Keeper

Automatically re-authenticates your Chrome profile when Google sign-in expires

4

★ 5.0

Connect Live Frontend To Local Server

This extension enables seamless connection between your local server and a live frontend by redirecting APIs.

157

★ 4.9

OpenID Connect Helper

Automate the OpenID Connect playground

104