Best Free Diagram Software of 2025

Miro helps you keep your team's minds in sync. Miro is a virtual whiteboard and remote collaboration tool that helps cross-functional teams collaborate more effectively to create great things. Miro isn't a video conferencing tool, and Miro doesn't try to be. Miro's goal is to provide a platform for teams who work most effectively across areas, geographies, timezones to get more out of their ideas when they can't all be in the office together at the same time. It includes over 200 pre-made templates to capture and visualize ideas, collaboration tools like comments, chat screen sharing and video chat and integrations with popular business tools. Miro AI is your team's ultimate boost, empowering you to unleash your creativity and productivity like never before. We are your launchpad to the future, providing the assistance you need to bring your next big idea to life. Let Miro AI help you unlock the full potential of your team's innovation and collaboration capabilities.

Backlog is a collaboration and project management tool that teams can use to increase productivity, visibility, and simplify project tracking. To release high-quality projects faster, development teams can collaborate with IT, Marketing, and Design. The core features include Gantt Charts and Burndown Charts as well as Issues, Subtaskings, Watchlists, Comment threads. Version control, File sharing, Wikis and Bug Tracking are all part of the core. You can update your projects anywhere with the iOS and Android apps.

Pencil is an open-source user interface drafting tool. Evolus uses Mozilla's technologies to create it. This tool allows analysts and developers of application interfaces to quickly create application interfaces for customers to communicate with them. application development. Evolus is proud to be a part of the Pencil tool-building project. Pencil is now available as an open-source tool (GPL License) so that anyone can access the source code to modify and upgrade. . Pencil can either be used as an add-on for Mozilla Firefox 3 or as a standalone program. Pencil can be used on any platform Mozilla Firefox 3 supports.

Samepage, an award-winning collaboration software for teams, allows you to collaborate with your team and get more done. Sampage allows teams of any size to benefit from a variety of online collaboration tools, including video conferencing, task management and file sharing. It integrates with top business apps, which helps users consolidate workflows.

Where teams collaborate to design. Figma allows teams to create, test and ship better designs from beginning to end. Your work will be fast and powerful. Figma is packed with design tools you already love and unique inventions such as the Arc tool or Vector Networks. Figma keeps your ideas flowing. You don't need to stop to save, export, or install. It's what cloud software should do. Animated prototypes make your ideas come to life faster and feel just like the real thing. Get feedback from users and test your ideas earlier and more often. You can share a link to your prototypes or design files and get feedback from others. You can also jump into the same file as your colleagues, no matter where you are located in the world, and co-edit it live. You can create a scalable design system that is easy to manage and accessible for your company. If all designers speak the same language, everyone is more empowered to do their best work.

ClickCharts makes it easy to create flowcharts or diagrams with this software. Create powerful visuals of your organization, process, mindmap, UML diagram, and other details quickly. Your data flow and value streams can be mapped. Find bottlenecks and ways to improve productivity. You can either jump start the process using template options or you can start from scratch with your choice shapes, symbols, line connectors, and more. Export to jpg and gif or png, and many other formats.

yEd, a powerful desktop program that generates high-quality diagrams quickly and efficiently, is available for free. You can either create diagrams by hand or import data from the internet for analysis. With just a click, our automatic layout algorithms can arrange large data sets. yEd is free and available on all major platforms: Windows and Unix/Linux.

Heptabase helps you visually organize your learning, research and projects. Visualize your notes using whiteboards, sections and mindmaps to make sense of everything you've learned. Bring together all your highlights, PDFs and research notes, as well as annotations, to gain new insights. Using powerful tags and properties, you can manage complex projects with clarity. You can also access your notes offline with lightning-fast speed. Sync your notes and access them from any desktop device, mobile device, or web browser. Access all files and notes without an internet connection. Search, load and edit your notes at lightning speed. Heptabase, a visual note-taking program, is designed to help you research and learn complex topics. It helps you gain a deeper understanding of the things you care about. Heptabase's design focuses on helping users "understand topics they care about" rather than "taking more notes."

The application allows you to quickly create diagrams, UI Mockup, flow charts and UML. VisualDesigner allows users to drag the right mouse to create an attached object, change the shape of the selected object, and auto-align with another object during resize and move.