Blog
Technical walkthroughs, debugging checklists, security workflow notes, and tool-specific guides for Online Dev Tools.
New posts are published from local drafts on a scheduled workflow, then surfaced here, in RSS, and in the sitemap.
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Print-Ready PDFs from HTML: Paged.js, Headless Chromium, and the Truncated-Render Pitfall
A practical workflow for turning HTML and CSS into paginated, print-ready PDFs with Paged.js and headless Chromium — including the async-render pitfall that silently truncates your document to one page.
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Password Strength Is Mostly Length: Entropy, Crack Times, and What Actually Helps
What password 'entropy' really measures, how offline crack-time estimates work, why length beats symbol-swapping, and the handful of habits that actually keep accounts safe.
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Triaging a Suspicious Domain From the Browser: A Five-Minute Workflow
A fast, repeatable workflow for triaging a suspicious domain using only browser-based tools — resolve it, attribute the IP, check the range, and pull registration data.
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Log Triage Checklist for Faster Incident Response in the Browser
A practical checklist for sorting noisy logs, isolating the first meaningful error, and moving from raw output to a clear incident lead.
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Hashing vs HMAC for Engineers: Choosing Algorithms and Avoiding Common Mistakes
Learn when to use plain hashing vs HMAC, how to choose algorithms like SHA-256, and avoid critical security mistakes. Practical guide for engineers.
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WHOIS and Domain Intelligence: Investigating Ownership, Registrar Signals, and Response Workflows
Learn how WHOIS lookups reveal domain ownership, registrar data, and abuse signals. Build effective investigation and response workflows with domain intelligenc
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JSON Formatting for API Debugging: Predictable Diffs, Key Sorting, and Schema Checks
Learn how JSON formatting with key sorting and schema validation streamlines API debugging, produces predictable diffs, and speeds up code review.
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CSP Hardening Workflow: From Report-Only to Full Enforcement with Practical Testing
Learn how to harden Content Security Policy step by step—starting in report-only mode, analyzing violations, and enforcing safely with practical testing.
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Building a Lightweight Incident-Response Toolbelt in the Browser: Repeatable Workflows
Learn how to build a browser-based incident response toolbelt with repeatable workflows using lightweight online dev tools for faster triage and resolution.
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