If you need a powerful file converter that can handle lots of formats and let you edit and inspect designs online, Magicul is a good option. It can convert Adobe XD, Sketch, Figma, Photoshop, Illustrator and PDF files, and it has an online inspector tool that lets you view and edit the design files. It also can automatically back up Figma designs, export designs for prototyping, and preserve text and color styles. Magicul is designed to speed up your workflow and save you time on conversions, and it's good for small teams or large ones.
Another option is LightPDF, an AI-powered online tool for managing, converting and analyzing documents. It can convert to and from Word, PowerPoint, Excel, Text, PNG and JPG formats, among others. LightPDF also has a lot of editing, merging, splitting, annotating and optimizing options, too, so it's good for personal or professional use. Its cloud-sync option and professional PDF API tools are geared for businesses, though.
If you're looking for something more specialized, EdrawMax is an online diagramming tool that can create more than 280 types of diagrams, including flowcharts and engineering designs. It can import common file formats and has a lot of tools and AI-assisted diagramming abilities. It's also got a cloud-based collaboration workspace and a library of templates and symbols, so it's good for marketing, engineering, IT and other fields. It's free to try, so you can see if it's right for you.