hello guys,

I’m Leo, the solo dev behind onlinetool.co, Online Tool co offers free online tools: such as online calculators, online converters, online coding helpers, generators, compressors. Anytime, anywhere, ready when you need it!

Every page loads in true-black dark mode by default, so you can marathon through tasks without eye strain.

I personally built every tool on the site: each one launches faster, feels smoother and outperforms the best-known alternatives—no bloat, no ads, just pure speed.

And it speaks seven languages at launch—English, German, French, Spanish, Italian, Japanese and Chinese—covering ~70 % of the world’s population natively. I hope you'll like it, thanks~