Blog
Tips, guides, and insights on privacy, tools, and web development.
Why Privacy Matters When Using Online Tools
Most online tools upload your files to remote servers. We explain why browser-based processing is the safer choice and how Vaultool keeps your data on your device.
The Best Free Image Optimization Tools in 2026
A practical comparison of image compression and optimization tools. Learn which formats and settings give you the smallest file size without visible quality loss.
JSON Formatter: 5 Common Mistakes Developers Make
Working with JSON is routine for most developers, but subtle formatting issues can waste hours. Here are the mistakes we see most often and how to fix them quickly.
How to Merge PDF Files Online Without Compromising Security
Merging PDFs shouldn't mean uploading sensitive documents to unknown servers. We walk through a client-side approach that keeps your files entirely local.