About t4io

t4io is a collection of free online tools made for everyone: children, grandparents, students, office workers and developers. Most tool websites are crowded with tiny buttons, pop-ups and sign-up walls. We built the opposite: big buttons, clear words, and one simple job per page.

What makes us different

• Your files stay on your device. Our tools run inside your web browser. When you convert a video or a picture, it is never uploaded to our servers.
• No account needed. Open a tool and use it. There is nothing to sign up for.
• Free. The site is paid for by a small number of ads, so the tools stay free for everyone.

Our tools

We offer video to MP3 and MP4 converters, a picture converter, a QR code maker, a unit converter, writing tools such as a word counter, and developer tools like a JSON formatter and Base64 encoder. See all tools.

Get in touch

Have an idea for a new tool, or found something that does not work? Contact us.