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Guides
Articles grouped by the job they support. Each one is meant to stand alone — tools are linked where they help you do the work, not the other way around.
How GenShelf works
What actually happens in the browser, and what this site never sees.
QR codes
Static codes, logos, print sizing, and why a phone might fail to scan.
QR codes explained: when to use them and how to make them scan
What a QR code stores, print tips, logo placement, and common reasons scanners fail.
13 min read
How QR logos affect scan rates (and how to brand without breaking scans)
Error correction, logo size, contrast, and a field-test checklist so branded codes still scan on real phones.
13 min read
Print-ready QR codes: size, paper, and placement that actually scan
Sizing rules, quiet zones, finishes, and packaging layouts so printed codes work under real lighting.
12 min read
Passwords and usernames
Length, managers vs generators, and handles that still look like you.
How to create a strong password (and remember it)
Length, randomness, password managers, and what to avoid — practical advice you can apply today.
12 min read
Password managers vs password generators: what each one is for
Generators create strong secrets; managers store and autofill them. How to use both without mixing up the jobs.
12 min read
How to choose a username that still feels like you
Patterns that work across platforms, availability tips, and how to avoid lookalike traps.
11 min read
Color and contrast
Palette roles and WCAG ratios for UI that stays readable.
Color palette basics for readable UI and brand work
Hue relationships, contrast, and a simple workflow for building palettes you can reuse.
12 min read
Color contrast that passes: a practical WCAG checklist for UI
Text vs background ratios, large text rules, non-text UI, and how to fix pretty-but-unreadable palettes.
12 min read
Developer fixtures
UUID versions, synthetic names, and staging data that will not leak customers.
UUID v4 vs v7: which ID format should you use?
Random vs time-ordered UUIDs, database indexing trade-offs, and when each version fits.
12 min read
Fake names for demos and test data without looking fake
Choose realistic placeholder names, avoid celebrity traps, and keep staging data safe.
11 min read
Staging data privacy: fake names, IDs, and demo hygiene that won’t bite you
Keep real customers out of screenshots, seed realistic fixtures, and scrub staging before every demo.
12 min read
Business and writing
Freelance invoices, word-count targets, and placeholder copy that stays in mockups.
Freelance invoicing that gets you paid: what to include and how to follow up
Invoice anatomy, payment terms, deposits, tax lines, and a practical follow-up cadence for freelancers.
14 min read
Word count targets for writers, students, and SEO
Essay lengths, blog post ranges, meta title/description limits, and how to use reading time without obsessing.
12 min read
How to use lorem ipsum (and when English filler is better)
Why designers use placeholder copy, Latin vs English filler, and habits that keep mockups honest.
11 min read
Social and local search
Hashtag mixes that match each platform, plus location SERP checks with UULE.
Hashtag strategy that still works on Instagram, TikTok, and X
Mix broad, niche, and branded tags, match platform norms, and avoid spammy sets.
12 min read
Safe hashtag practices: spam filters, shadowbans, and what to avoid
How platforms flag tag spam, banned and toxic tags, rotation habits, and a clean posting checklist.
13 min read
How to check Google search results by location with UULE
Use a Google UULE generator to encode a city into a search URL, pair it with gl and hl, and spot-check local SERPs for SEO research.
14 min read