Frequently Asked Questions

What is Convert Tools Online?

Convert Tools Online is a free collection of browser-based unit and format conversion utilities covering length, weight, temperature, speed, data size, and more — all running instantly in your browser without any account or installation.

Are these tools free?

Yes. All tools are completely free with no sign-up, no ads blocking results, and no usage limits.

Do I need to create an account?

No. Every tool is available immediately without registration.

How accurate are the conversions?

Our conversions are based on internationally recognized standards and definitions. For most everyday and professional use cases, results are precise. For safety-critical applications (medical, engineering, legal), always verify with authoritative references.

Which units and formats are supported?

We cover the most commonly used units across length, weight, temperature, area, volume, speed, time, data storage, and more. Each tool's page lists the full set of supported units.

Is my data sent to your servers?

No. All conversions happen locally in your browser. Your input is never transmitted to our servers.

Can I use these tools on mobile?

Yes. All tools are fully responsive and work on any modern browser on smartphones and tablets.

Which browsers are supported?

Chrome, Firefox, Safari, and Edge — on both desktop and mobile.

Why might my result differ from another converter?

Minor differences can arise from rounding precision or the specific definition used for a unit (e.g., US vs. imperial units). We display the standard used on each tool page.

How do I report a bug or request a new conversion?

Use our Contact page. We read every message and aim to respond within two business days.