Your JWT decoder might be leaking your tokens. Here's how to check.
Developers often paste production JWTs into online decoders without considering the security risks. This article highlights the importance of checking whether a JWT decoder sends tokens over the network. It provides a simple method to verify the safety of online decoders and suggests alternatives for decoding tokens locally.
- ▪JWTs are not encrypted and can contain sensitive information such as user IDs and session identifiers.
- ▪Pasting a JWT into an online decoder can expose it to potential security risks if the decoder sends data over the network.
- ▪A quick check in the browser's DevTools can reveal whether a decoder is truly client-side and secure.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3924504) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } engr anees Posted on May 29 Your JWT decoder might be leaking your tokens. Here's how to check. #security #webdev #jwt #devtools Most developers paste production JWTs into online decoders without thinking. Here's a 10-second DevTools check to see if your token is actually leaving your machine. A coworker was debugging an auth bug last month. Standard workflow: copy the JWT from the failing request, paste it into an online decoder, read the payload. I've done it a thousand times.
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