Blog
Practical guides and FAQs alongside our tools—built for readers and discovery.
- 6 min read
Cron Jobs and Timezones: Why Your Schedule Fires at the Wrong Hour
Five-field vs six-field cron, DST gaps, UTC versus local time, and how to test expressions before they wake you up at 3 a.m. server time.
- 7 min read
GPT Token Limits Explained: How to Count Tokens Before You Hit the Wall
Learn how LLM token budgets work across models, why character counts lie, and a practical workflow to estimate prompts locally before you pay for a failed API call.
- 6 min read
HEIC Photos on iPhone: Convert to JPG in the Browser Without Uploading
Why Apple’s HEIC format breaks older workflows, how client-side conversion protects privacy, and step-by-step options for developers and everyday users.
- 6 min read
Text Chunking for RAG and LLMs: Size, Overlap, and Boundaries That Actually Work
Why naive splits destroy retrieval quality, how overlap and headings improve recall, and a practical recipe for chunking long documents before embedding.
- 6 min read
YAML on Kubernetes: 12 Config Mistakes That Break Deployments at 2 a.m.
Tabs, ambiguous scalars, merge keys, and copy-paste from Helm charts—learn why YAML looks fine in an editor but fails in the API server, and how to validate locally first.
- 7 min read
Unix Timestamps: Leap Seconds, the Year 2038 Problem, and Timezone Traps
A developer-first guide to POSIX time—what seconds since the epoch really mean, how leap seconds and calendars diverge, why 32-bit clocks still matter, and how to avoid DST bugs when converting.
- 7 min read
Cryptographic Random vs Pseudo‑Random Passwords (What Developers Get Wrong)
A clear distinction between fast PRNGs and cryptographically secure randomness—why Math.random fails for secrets, how entropy scales with length, and safe patterns for user-facing generators.
- 7 min read
QR Code Error Correction Explained (L, M, Q, H) + 7 Practical Use Cases
Understand QR error correction levels in plain language—how redundancy trades scan reliability for capacity—and pick the right level for tickets, Wi‑Fi cards, industrial labels, and more.
- 8 min read
Compress Images Under 100KB (Without Uploading Them Anywhere)
A practical guide to shrinking photos and screenshots under tight byte limits—covering dimensions, formats, quality trade-offs, and why browser-local compression protects sensitive screenshots.
- 7 min read
10 JSON Debugging Mistakes That Waste Hours (and How to Fix Them Fast)
Learn the most common JSON parsing failures—from trailing commas to subtle Unicode issues—and a practical workflow to validate payloads before they hit production.