Articles & Guides
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74 articles · Page 7 of 8
SSH and RSA Keys Explained: Generate, Use, and Secure Your Key Pairs
A practical guide to SSH and RSA key pairs — how they work, how to generate them in your browser, and how to use them for secure server access and encryption.
CSS Tools Every Developer Should Know About
Gradients, box shadows, color contrast, Tailwind conversion — a practical guide to browser-based CSS tools that speed up front-end development.
Image Optimization for the Web: A 2026 Performance Guide
Learn how to compress, resize, and convert images for faster websites — without sacrificing visual quality.
Regular Expressions for Beginners: Patterns That Actually Make Sense
A friendly introduction to regex syntax, common patterns for validation and search, and how to test expressions without frustration.
Strong Passwords in 2026: A Short Checklist for Real Humans
Length vs complexity, password managers, MFA, and how to test strength without sending secrets to a server.
SSL/TLS Certificates Explained (Without the Jargon)
What HTTPS certificates do, why browsers warn you, and how to check expiry and chain issues on your own domains.
From CSV to JSON: Working with Tabular Data in APIs
How to turn spreadsheets into JSON for APIs, watch out for headers and quoting, and validate payloads before you ship.
URL Encoding and Query Strings: A Practical Guide
Understand percent-encoding, reserved characters, and how to build safe URLs for APIs and sharing—without broken links.
UUIDs Explained: When to Use Them and How They Work
Learn what UUIDs are, the difference between versions, collision risk, and how to generate them safely for databases and APIs.
FreeTool24 – Your Go-To Hub for Every Free Tool You Need Online
Discover FreeTool24.com, the all-in-one platform packed with free tools for developers, designers, students, and everyday users. No signup, no fees — just results.