Practical guides to developer, DevOps and electrical-engineering tasks — written around tools that run entirely in your browser.https://blog.kitboxdev.com/enhttps://blog.kitboxdev.com/google-authenticator-export-qr-is-not-encryptedhttps://blog.kitboxdev.com/google-authenticator-export-qr-is-not-encryptedThe "Transfer accounts" QR is base64 protobuf — every 2FA seed in plain sight. Here is the format, the risk, and a browser-only decoder that reads it.Sun, 23 Aug 2026 00:00:00 GMTcryptodecodergeneratorreferenceKitBoxDevhttps://blog.kitboxdev.com/online-jwt-decoders-that-log-your-secretshttps://blog.kitboxdev.com/online-jwt-decoders-that-log-your-secretsA remote JWT decoder does not need to be malicious to leak your token. Here is what its log pipeline captures, what an attacker does with it, and how to test for it.Sun, 23 Aug 2026 00:00:00 GMTcryptodecoderreferenceKitBoxDevhttps://blog.kitboxdev.com/jwt-vs-oauth2-claims-backend-securityhttps://blog.kitboxdev.com/jwt-vs-oauth2-claims-backend-securityOAuth2 is a flow, JWT is a format — and neither one authorises anything. The claims your backend verifies and validates are what actually decide access.Sat, 22 Aug 2026 00:00:00 GMTcryptodecodergeneratorKitBoxDevhttps://blog.kitboxdev.com/verify-ai-generated-cron-and-infrastructurehttps://blog.kitboxdev.com/verify-ai-generated-cron-and-infrastructureAn LLM will hand you a cron expression and a manifest that look right and run wrong. Here is the verification pass that catches them before a scheduler does.Sat, 22 Aug 2026 00:00:00 GMTdevopsconfigreferenceKitBoxDevhttps://blog.kitboxdev.com/spot-misconfigured-rs256-signaturehttps://blog.kitboxdev.com/spot-misconfigured-rs256-signatureRS256 fails quietly — the happy path verifies while the key, the PEM format or the algorithm allowlist is wrong. Here is how to catch it before it ships.Fri, 21 Aug 2026 00:00:00 GMTcryptodecoderKitBoxDevhttps://blog.kitboxdev.com/privacy-first-manifesto-local-browser-processinghttps://blog.kitboxdev.com/privacy-first-manifesto-local-browser-processingData-egress policy made third-party utility sites a compliance problem. Our answer is architectural — every tool runs in your browser, so credentials never leave the machine.Thu, 20 Aug 2026 00:00:00 GMTcryptodevopsreferenceKitBoxDevhttps://blog.kitboxdev.com/developers-devops-utility-guidehttps://blog.kitboxdev.com/developers-devops-utility-guideA step-by-step DevOps workflow built on client-side-only tools — cron parsing, CIDR maths, YAML and .env conversion, JWT debugging and Kubernetes resources.Wed, 19 Aug 2026 00:00:00 GMTdevopsconverternetworkcryptoKitBoxDevhttps://blog.kitboxdev.com/kitboxdev-launch-35-browser-toolshttps://blog.kitboxdev.com/kitboxdev-launch-35-browser-toolsWhy we built a tool platform with no backend, no accounts and no uploads — and what 35 finished tools, a 12 KB app shell and WCAG-audited contrast actually took.Tue, 18 Aug 2026 00:00:00 GMTannouncementperformanceaccessibilitydevopsKitBoxDev