About ConvertKoro

A small toolkit, built with one rule.

The rule

Your files stay on your device. Every tool on this site — merging, compressing, converting, splitting — runs as code in your browser. There's no server in the middle receiving your documents, which means there's nothing for us to store, lose, or hand over. We built ConvertKoro because most free converters ask you to upload your files first and trust a stranger's server with them. This one doesn't ask.

What's here

Live tools so far across PDF, image, and developer utilities — plus more on the way (browse the Tools menu to see what's planned). Each live tool is free, has no daily limit, and doesn't require an account.

How it's free

ConvertKoro is supported by a small amount of advertising on the page. There's no premium tier, no paywall, and no feature held back behind a subscription.

Who's behind it

ConvertKoro is an independent project, built and maintained by a small team who wanted a converter site that didn't feel like a data-collection funnel.

Get in touch

Found a bug, or want a tool we don't have yet? Reach us at support.convertkoro@gmail.com.