ToolBoxOnline Blog

Spaces become %20, ampersands become %26, and suddenly your URL works. A practical guide to URL encoding for anyone who's ever copied a link that broke.

See exactly how much that car loan or personal loan costs per month. Break down principal vs interest, and learn why paying extra early saves more than you'd think.

BMI is a useful screening tool but it misses a lot. Here's when to pay attention to your BMI and when to ignore it entirely.

Converting between HEX, RGB, and HSL isn't hard — once you understand what each format is for. Spoiler: use HEX for code, HSL for thinking.

A Markdown preview tool catches formatting mistakes before you publish. No more broken headings, misaligned tables, or code blocks that don't render.

Hash functions turn any text into a fixed-length string. Here's why that's useful for verifying downloads, storing passwords, and checking file integrity.

Stop typing conversion queries into Google one at a time. A proper unit converter handles length, weight, temperature, and volume all in one place.