Free! No sign-up.

Free calculators and converters that make your games & screens smarter.

Free Online Tools brings together 154 fast, focused calculators, converters, and utility tools. From fuel costs, paint estimates, and Ohm's law, to gaming helpers, URL encoding, public IP checks and much more.

Fast & lightweight

No bloated dashboards. Open a tool and get straight to work.

Privacy-minded

Simple tools with minimal friction, clear purpose, and no account required.

Easy to use

Consistent layouts across every tool, so you can find what you need quickly.

Built in Brisbane by Ethan & Tony

Free Online Tools is a father-and-son project from Queensland, Australia. We build calculators we actually use, fuel and towing maths, electrical helpers, converters, and everyday utilities, then add clear how-to notes so the page is useful even before you hit calculate.

Every public tool is maintained by us. Thin stubs, unfinished experiments, and policy-risky pages are kept offline. Prefer to know who runs the site? Read About, our Articles, or get in touch.

Tool library

Browse by category

154 free tools from Free Online Tools, listed in A, Z order within each category.

Type a tool name, or tap a category to browse.

Categories

Pick a category to see its tools

Or start typing in search. Everything stays on this page, no extra hops.

Tool of the day

Matrix Transpose Calculator

Linear algebra students transpose matrices with dimension checks, property flags for square, symmetric and vector forms, and a bracketed preview of the original and result in the browser. Transpose output is available as plain text, brackets, LaTeX or CSV bundles. Clean formatting normalises spacing, examples load a three by three grid, random matrices support practice, and copy or export bundles the original and transpose for worksheets.

Enter one row per line with spaces or commas between values, then run clean formatting to normalise spacing before you transpose. LaTeX output wraps the transpose in a pmatrix environment ready for lecture notes or Overleaf import. Use random matrices in tutorials when students need fresh examples without repeating lecture notes.

Open tool

Visitors: 7,315