Frequently asked questions
Privacy, accuracy, accounts, and everything else.
Frequently asked questions
Is ToolWillow free?
Yes. All tools are free forever, with no sign-up and no usage limits.
Do you store what I type into the calculators?
No. Every tool runs entirely in your browser. Your inputs never leave your device.
Do I need to create an account?
No — there are no accounts on ToolWillow.
Which browsers are supported?
Any modern browser: Chrome, Edge, Firefox, Safari, and their mobile versions. JavaScript must be enabled for the interactive tools.
Are the calculators accurate?
They use standard, documented formulas shown on each page. Financial and health results are planning estimates, not professional advice.
Can I suggest a new tool?
Please do — use the contact page and choose 'Tool suggestion'. Popular requests get built first.
Can I use the tools for my business?
Yes, personal and commercial use are both fine.
How do you make money?
At launch, we don't — the site is free and ad-free. If we ever add advertising, it will be clearly disclosed and privacy-respecting.
Is the image compressor safe for sensitive photos?
Yes — compression runs on your device via the Canvas API. The image is never uploaded anywhere.
How do I report a bug or wrong result?
Use the contact page with 'Bug report' selected, and include the inputs you used so we can reproduce it.