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Guides and deep dives on images, PDFs, encryption, and everyday digital tools.
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MD5, SHA-1, and SHA-256 - Which Hash Function Should You Use?
A clear comparison of MD5, SHA-1, and SHA-256 hash functions - what each one does, where they are still useful, and which one you should actually be using in 2026.
Feb 20, 2026 · 5 min read
PDF Password Protection - A Complete Guide
Everything you need to know about protecting PDF files with passwords - how the encryption works, what the different permission levels mean, and when you actually need it.
Feb 15, 2026 · 4 min read
How to Compress Images Without Losing Quality
Learn the best techniques and formats to dramatically reduce image file sizes while keeping them sharp and visually indistinguishable from the original.
Feb 10, 2026 · 4 min read