# Decode appSession cookie

**URL:** <https://community.auth0.com/t/decode-appsession-cookie/169633>\
**Category:** Get Help\
**Tags:** authentication-sessions, sessions\
**Created:** [January 21, 2025, 8:33pm UTC](https://community.auth0.com/t/decode-appsession-cookie/169633 "2025-01-21T20:33:44Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![gerald.czifra](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/gerald.czifra/32/75301_2.png) [@gerald.czifra](https://community.auth0.com/u/gerald.czifra)\
**Post date:** [January 22, 2025, 7:29pm UTC](https://community.auth0.com/t/decode-appsession-cookie/169633/3 "2025-01-22T19:29:19Z")

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Hi @bkstok

Welcome to the Auth0 Community!

Depending on the technology used, with Next.js you could be able to decode the JWT header, but not the payload, on the [https://jwt.io/](https://jwt.io/) website. Although this following [Community post](https://community.auth0.com/t/token-in-appsession-cookie-cannot-be-decoded/60591) does not tackle Vercel directly, it still goes over some issues with decoding the appSession cookie and I recommend that you look over it.

Allow me to link some other pages that could prove useful in this case:

- [@auth0/nextjs-auth0: Successful login but no session (on vercel)](https://community.auth0.com/t/auth0-nextjs-auth0-successful-login-but-no-session-on-vercel/131304/1)
- [How to Deploy a Next.js App Secured By Auth0 to Vercel](https://developer.auth0.com/resources/guides/web-app/nextjs/vercel-deployment)
- [GitHub - vercel/flags: Flags SDK by Vercel](https://github.com/vercel/flags)

Let us know if these resources helped resolve the issue!  
Gerald

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_[View the full topic](https://community.auth0.com/t/decode-appsession-cookie/169633)._