sk1 is the vector file format used by the sk1 software, which is open source and an alternative for Adobe Illustrator or CorelDRAW for Linux.
PDF is a document file format that contains text, images, data etc. This document type is Operating System independent. It is an open standard that compresses a document and vector graphics. It can be viewed in web browsers if the PDF plug-in is installed on the browser.
+200 Formats Supported
CloudConvert is your universal app for file conversions. We support nearly all audio, video, document, ebook, archive, image, spreadsheet, and presentation formats. Plus, you can use our online tool without downloading any software.
Besides using open source software under the hood, we’ve partnered with various software vendors to provide the best possible results. Most conversion types can be adjusted to your needs such as setting the quality and many other options.
Our API allows custom integrations with your app. You pay only for what you actually use, and there are huge discounts for high-volume customers. We provide a lot of handy features such as full Amazon S3 integration. Check out the CloudConvert API.