ToolHub Blog
How to create a secure password in 2026: complete guide
Everything you need to know about secure passwords: length, characters, management and why you should never reuse them. Practical 2026 guide.
4 read minQR Codes: complete guide, creative uses and security
What a QR code is, how it works, when to use it and when to avoid it. Complete guide with practical examples: menus, tickets, WiFi, payments.
5 read minBMI: meaning, calculation, limits and interpretation
What BMI is, how it's calculated and how to interpret it. Limits and when it's not reliable. Clear guide with practical examples.
4 read minJSON: what it is, syntax, validation and best practices
Complete guide to JSON: syntax, data types, common errors and how to format them. For developers and anyone working with APIs.
5 read minUUID vs autoincrement ID: which to use in your database
Differences between UUID and autoincrement ID, pros and cons of each. When to use UUID v4, v7 or numeric sequences in modern databases.
4 read minVAT calculation: guide with practical examples and extraction
How to calculate Italian VAT: 22%, 10%, 4%. Adding to net or extracting from gross. Practical examples, formula and common cases.
3 read min