Guides
Short, practical docs: repeatable workflows from input to output.
Long-tail articles
How to repair JSON-ish input
Turn commented/trailing-comma/single-quote snippets into strict JSON.
Offline-first: why it’s more private
What local-only processing means, and what you should still avoid pasting.
Base64 vs Base64URL: avoid decode failures
Differences, common pitfalls, and why JWT uses Base64URL.
JWT debugging: exp/iat/roles fast checks
Decode locally to check expiry/claims quickly (no signature verification).
cURL repro checklist (incl. PowerShell pitfalls)
Get reproducible requests right: method, headers, body, quoting, newlines.
Regex performance & catastrophic backtracking
Why some regexes explode on long inputs and how to rewrite them.
Timestamp seconds vs milliseconds: quick diagnosis
10 digits is usually seconds, 13 digits usually milliseconds—common mistakes included.
YAML multi-document (---) explained
Common in K8s/CI: one file contains multiple documents—how to parse/convert.
Diff ignore whitespace/case: reduce noise
Why diffs get noisy and when to ignore whitespace or case.
QueryString debugging: repeated params & encoding
How a=1&a=2 is parsed, and how to debug %20/+ and double-encoding.
CSV↔JSON & Excel: BOM, delimiters, and garbled text fixes
Common encoding/delimiter issues when round-tripping through Excel—and how to verify locally.
MD5, SHA1, SHA256: real use cases (not encryption)
What digests are good for, what they are not, and pitfalls in downloads vs cache keys.
JSONPath basics: five expressions that cover most queries
Roots, wildcards, recursion, filters, and slices—plus common errors and fixes.
Cron 5-field vs 6-field: why schedules look right but never fire
Linux crontab vs Quartz/Spring: seconds field, day-of-week vs day-of-month, and timezone gotchas.
UUID v4 vs ULID: log-friendly IDs and sortability trade-offs
Random UUIDs vs time-sortable ULIDs for indexing, tracing, and log correlation.
HTML entities inside JSON: escaping pitfalls in templates
Embedding HTML snippets, email templates, or rich-text placeholders in JSON—quotes, ampersands, newlines.