About Mejunis

What this is

Mejunis is a small collection of file and calculation tools that run entirely inside your browser. There is no account to create, nothing to install, and no file is ever sent anywhere.

That last part is the reason the site exists. Most online converters work by uploading your document to a server, processing it there, and promising to delete it afterwards. You have no way to check whether they did. Here the question does not arise: the conversion happens on your own device, using capabilities your browser already has.

Who builds it

Hi, I’m Marius, a software engineer from Lithuania with ten years’ experience, and this is a solo project. I wanted tools that are simple, fast, and safe to use on a document you would not hand to a stranger. The site carries ads, because that is what pays for it, but an ad will never stand between you and your result: no interstitial, no countdown, no signup before a download.

How it is paid for

The site is static files on a CDN, which costs very little to run whether ten people or ten thousand use it. It is funded by display advertising, and that is the only commercial relationship involved: nothing about you is sold, because nothing about you is collected.

Visits are counted using a cookieless analytics tool that records which page was requested and roughly where in the world the request came from. It cannot identify you, and it never sees the files you open. This is described in full in the privacy policy, linked at the foot of every page.

How the promise is enforced

The claim that your files are never uploaded is not only a policy. The site ships a Content-Security-Policy header that forbids the browser from sending data to any other origin: connect-src 'self' blocks background requests, and form-action 'none' means no form on the page can post anywhere at all.

The practical effect is that a bug which tried to upload your file would be refused by your browser rather than silently succeeding. You can verify this yourself: open the Network tab in your browser’s developer tools and use any tool on the site.

Languages

The site is published in English, Lithuanian and Polish. Each language is written for its own readers rather than machine-translated from English, and a native speaker has read every page.