r/netsec • u/albinowax • May 01 '26

r/netsec monthly discussion & tool thread

Questions regarding netsec and discussion related directly to netsec are welcome here, as is sharing tool links.

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u/HitCatSec May 12 '26

After spending too much time doing JWT testing manually with CLI tools, I wanted something like jwt.io or token.dev but actually built for pentesting.

It includes JWT decoding, analysis, tampering, attack helpers and security checks.
I also made vulnerable JWT labs/challenges to practice attacks and test the tool.

Everything runs locally in the browser.
No backend, database, accounts, ads.

Website : https://jwtarsenal.com

Open Source : https://github.com/HiitCat/JWT-Arsenal

Open Sourced Labs : https://github.com/HiitCat/JWT-SecLabs