Blog — FreeDevToolz Tips & Guides

Guides, tips and tutorials on free image and data utilities that run in your browser.

• UUIDs and the Birthday Paradox: How Random Is Random Enough?
• Error Messages as Culture: Why Developers Wear Their Bugs
• Redact Screenshots Safely: Why Blur Isn't Enough (and Never Upload the Original)
• How to Remove a Solid-Color Background from an Image Without Uploading
• Regex for Humans: A Practical Guide to Testing Patterns in Your Browser
• How to Compress Images for the Web Without Losing Quality
• HTML Entities: Your First Line of Defense Against XSS
• Anatomy of a JWT: How Tokens Work and Why You Should Decode Them Locally
• Hashing vs. Encryption: What Every Developer Should Know
• SVG to PNG in the Browser: Why No-Upload Conversion Matters
• From Binary to Base64: How Browser-Based Encoding Really Works
• How Browser-Based Tools Keep Your Data Private
• Working with JSON and CSV: A Developer's Guide
• Image Formats, Canvas, and Browser Conversion