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Guides on the formats and tools people touch every day, written by the a2zutil.dev team.

Guides

5 Habits for Debugging Messy JSON Payloads Faster

The difference between a two-minute payload review and a twenty-minute one usually comes down to a few small habits.

Jul 28, 2026 · 5 min readRead
Guides

SQL Formatting Conventions That Make Code Review Easier

A query that's easy to review is one where the diff shows the actual change, not a reflow of every line around it.

Jul 21, 2026 · 5 min readRead
Webhooks

Testing Webhooks Locally Without Exposing Your Machine

You don't need to punch a hole in your firewall to see what a provider actually sends before your endpoint touches it.

Jul 14, 2026 · 4 min readRead
Guides

UUID v4 vs Nanoid: Picking the Right ID Format

The right ID format depends less on randomness quality and more on where the ID ends up — a URL, a database index, or a log line.

Jul 7, 2026 · 5 min readRead
Guides

A Field Guide to Case Conversion: camelCase, snake_case, kebab-case

Every case style exists because some system it talks to enforces it — knowing which is which saves a round trip to Stack Overflow.

Jun 30, 2026 · 4 min readRead
Product

Why We Don't Ask for an Account

An account is a cost to us and a cost to you — we'd rather earn the visit back than lock the tool behind a login.

Jun 23, 2026 · 4 min readRead

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