How SimplyConverter works

SimplyConverter is a set of free file converters built around one rule: your files never leave your device.

Where the conversion happens

When you open a converter page, your browser downloads a small conversion program along with the page. When you choose a file, the browser reads it directly from your device, the program converts it in your browser's memory, and the result is handed straight back to you as a download. At no point is the file sent over the internet.

How your files are handled

• Not uploaded. Your file is not sent to our servers or anyone else's.
• Not stored. The file and the converted result exist only in your browser's memory, and are gone when you close the tab.
• Not seen. We have no copy of your file, so we cannot view, share or lose it.

How to check it yourself

Open any converter, wait for the page to finish loading, then turn off your Wi-Fi or mobile data. Convert a file: it still works, because nothing needs to be sent anywhere.

The technology

SimplyConverter is built on well-known open-source tools:

• pdf.js by Mozilla, the PDF engine built into Firefox, draws PDF pages for PDF to image conversion.
• libheif decodes iPhone HEIC photos in browsers that can't open them natively.
• pdf-lib builds PDF files from your images.
• Your browser's own image engine handles JPG, PNG, WebP and AVIF.

Is it really free?

Yes. Because the conversion runs on your device, the site costs very little to run. It is supported by ads, so there are no sign-ups, watermarks or daily limits. Ads never have access to your files. See our privacy policy for details.

Contact

Questions or ideas for new converters: hello@simplyconverter.net.