About Us

Zellio.io is a free collection of fast, privacy-first micro-tools for everyday developer, text, image and measurement tasks. Everything runs entirely in your browser — there are no sign-ups, no uploads and no servers processing your data.

Our mission

We believe simple utilities should be instant, free and respectful of your privacy. Each tool is designed to do one job well, load quickly and work on any device.

How it works

All processing happens locally on your device using standard web technologies. Your files and text never leave your browser, which keeps your data private and the tools lightning fast.

Get in touch

Have feedback or an idea for a new tool? Email us at hello@zellio.io.