Blog
Guides, explainers, indexes and performance notes about our privacy‑first utilities.
Free Online Tools You Can Use Right Now (Text, Dev, Image, Security, Conversion)
A comprehensive, SEO-friendly index of all free, fast, privacy-first utilities on ToolsAreUs: text, dev, hashing, conversion, randomness, color, and image tools.
How to Generate Secure Passwords Online (Length, Entropy, Managers, Myths)
Learn how to create strong, unique, high‑entropy passwords using our password generator—length vs complexity, entropy math, storage tips, and common mistakes to avoid.
Choosing the Right Hashing Algorithm (SHA-256 vs HMAC vs Password Hashing)
Understand when to use SHA-256, when to use HMAC, and why password hashing requires algorithms like bcrypt, scrypt, Argon2—not raw hashes.
Understanding Base Encoding (Base64, Base32, Hex) and When Each Matters
A practical guide to Base64, Base32, and hexadecimal encoding—why they exist, how padding works, URL-safe variants, and common mistakes.
QR Code Best Practices (Size, Contrast, Error Correction, Content Limits)
Make scannable, reliable QR codes: minimum size, error correction levels, color contrast, quiet zone, data capacity, and tracking ethics.
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