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.

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.

Lucidchart is an online diagram tool that allows you to create and share professional diagrams. We support all aspects of communication and collaboration, from system design to brainstorming to project management. Lucidchart is loved by millions.

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.

Edraw Max is a versatile diagramming tool that enables users to create a wide range of visual representations, including flow charts, mind maps, organizational charts, network diagrams, and floor plans, all supported by an extensive collection of examples and templates. This powerful all-in-one software caters to various needs, whether you're designing flowcharts, fishbone diagrams, or even office layouts, ensuring that you find exactly what you require. Notably, its affordability sets it apart from other similar tools on the market. With thousands of professionally crafted templates available, you can quickly get inspired and kickstart your design process. Additionally, Edraw Max boasts excellent file compatibility, allowing for easy import of Visio files and export of your creations in numerous familiar formats like PDF, Word, PPT, and JPEG. The software empowers you to effortlessly produce over 280 different types of diagrams, ranging from technical illustrations to engaging infographics, proving to be a superior alternative to Visio in many aspects. Overall, Edraw Max is an indispensable resource for anyone looking to enhance their diagramming capabilities and improve their workflow efficiency.

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.

A collaborative online whiteboard designed for teams to brainstorm and innovate together. Share, explore, and develop ideas as a unit, enhancing communication with sticky notes for additional thoughts. Engage with one another through dot voting, stamping, emoting, drawing, or chatting to express feelings and reactions. Organize your concepts effectively using markers, shapes, and connectors to illustrate their relationships. Document processes and systems with various pre-made shapes and connectors that align easily with the grid. FigJam is user-friendly and straightforward, ensuring that both you and your team can maintain a productive flow while brainstorming. It works seamlessly alongside Figma, allowing all design tasks—from initial ideas to final execution—to be centralized in a single platform. Team members can also access design libraries within FigJam to create materials that are cohesive and aligned with brand standards. Quick expressions can be made to convey emotions without overcrowding your FigJam canvas, while stamps facilitate idea voting, appreciation, or indicating areas requiring follow-up. Additionally, the cursor chat feature provides an efficient way to exchange thoughts during live brainstorming sessions. Default library assets or personal components can be used to personalize your workspace and enhance the creative process. Overall, FigJam fosters a dynamic environment where collaboration flourishes.

Design various shapes and diagrams to enhance your documents, presentations, and websites with vibrant charts and visuals that are simple to create. Collaborate seamlessly by constructing charts, layout diagrams, and flow charts, which can be effortlessly integrated into other documents or embedded on websites. Would you like to share your thoughts? You can comment on any shape or text box, providing additional context to your conversation, and even notify others via email by tagging them in a comment. Enjoy the convenience of accessing your work from anywhere, at any time, as all your creations are automatically saved and stored in Google Drive, allowing you to retrieve them on any device you choose. This ensures that your creative projects remain within reach, no matter where you are or what device you are using.

Draw.io, which is often referred to as diagrams.net, serves as a versatile and robust online application for crafting diagrams, flowcharts, and various visual representations. This tool enables users to create an extensive array of diagrams, ranging from basic organizational charts to intricate network designs. It boasts seamless integration with well-known cloud storage platforms like Google Drive, OneDrive, and GitHub, facilitating effortless access and collaborative efforts among users. Prioritizing user privacy and data security, Draw.io offers options for storing diagrams either locally or in the cloud, ensuring that users maintain control over their information. Additionally, its user-friendly interface makes it accessible for individuals with varying levels of design experience.

Cacoo by Nulab, an online diagram software, is trusted by over 2 million users. Cacoo allows modern teams to create wireframes and flowcharts, organization charts and mind maps. This facilitates collaboration and productivity. Integrations are available with top apps like Dropbox, Google Drive and Confluence.

Napkin effortlessly converts your written ideas into visuals, making the process of sharing your thoughts both swift and efficient. Rather than relying on prompts, Napkin operates directly from your text input, generating visuals that are most pertinent to your content. You then have the opportunity to choose the image that best encapsulates your vision. The visuals produced by Napkin are completely customizable, allowing you to modify both the content and style for maximum effectiveness. You can enhance your visuals by adding or substituting icons from a vast collection, ensuring that the aesthetics align with your concept. With dynamic connectors capable of linking various elements, and colors that maintain appeal in both light and dark modes, Napkin's versatility truly stands out. The visuals you create can be applied across various platforms, capturing your audience's attention with auto-generated infographics, diagrams, flowcharts, and more. In essence, Napkin serves as your personal visual consultant, ready to transform your text into engaging visuals like charts, scenes, and images, thus helping you effectively communicate your ideas. This innovative tool not only simplifies the transition from text to visuals but also empowers you to present complex information in a clear and appealing manner.

Create diagrams swiftly by using text commands. Construct schemas directly from your keyboard without needing to switch to a graphical interface. Input only the essential details you require to express your ideas effectively. Maintain your creative momentum without interruptions from GUI tools. Well-designed diagrams enhance the visual appeal of your documents and facilitate clearer communication. You can also easily share your diagrams over the internet for collaboration.

ERD Lab is a web-based tool for creating ER diagrams that enables users to design their databases visually. You can either import current SQL databases or create new ones without needing to write any code at all. This platform allows you to visualize your database schemas easily, making it simple to share and collaborate with your team members. Once you have completed your design, you can export it as SQL, PDF, or an image file, and the best part is that all these features are available at no cost! Whether you are a beginner or an experienced developer, ERD Lab offers a user-friendly experience for everyone.

Pencil is a user interface design tool developed by Evolus, which operates on technologies provided by Mozilla and is available as open source. This innovative tool allows analysts and developers to swiftly create application interfaces, facilitating effective communication with customers during the requirements gathering phase and serving as a foundation for collaborative application development. The creation of the Pencil project is part of Evolus' commitment to contribute to the community, which is why it has been made available under the GPL license, enabling users to access its source code for modifications and enhancements. Users can utilize Pencil either as an add-on for the Mozilla Firefox 3 browser or as an independent application. Additionally, Pencil is designed to be cross-platform, ensuring compatibility across any system that supports Mozilla Firefox 3, thus broadening its usability. This versatility makes it an invaluable resource for teams looking to streamline their interface design process.

Creately, a versatile visual collaboration platform, streamlines the journey from ideation to execution within a shared visual space. Offering a rich collection of 10,000+ templates, teams can visually integrate ideas into diverse frameworks, map processes, or delineate entire organizational structures. Initially fostering innovation and big-picture thinking, Creately transforms into the definitive project and team hub over time, functioning as a Visual Database. Users can enrich visual content with notes, attachments, and linked data, consolidating crucial information within Creately. Creately ensures data coherence by automatically updating linked information across the platform, establishing itself as the singular source of truth for projects and teams. Ideal for hyper-collaborative meetings, workshops, brainstorming sessions, process mapping, technical designs, and agile project planning, Creately stands out as an indispensable tool for teams navigating collaborative complexities.

Venngage is the easy design platform that brings dull data, dry documents and complex information to life. Access a library of engaging visual communication templates, created by our expert in-house designers, to create powerful visuals. You don’t need any design experience! With our simple drag and drop editor, video tutorials and courses, videos and courses, you’ll be creating stunning designs in minutes. Venngage has a wide range of templates perfect for business and professional communications including infographics, charts, reports, diagrams, mind maps, presentations, and more so that you can impress your boss, your clients, prospects and online audience.

JointJS+ is a diagramming toolkit, a commercial extension of JointJS, that allows developers and companies of any size to create advanced Low-Code/No-Code and visual applications. Developers can utilize pre-built UI plugins to build custom applications, customize user interfaces and embed elements according to their requirements. Businesses can utilize JointJS+ to integrate interface with workflow systems, build business process management, diagramming, and project management applications, and more. It provides a programmer’s kit, which allows users to undo or redo changes, conduct graph manipulation, and validate data. Other features include custom shapes, JSON import/export, interactive diagrams, read-only view, automatic layouts, inline text editor, path editor, zoom, charts, and more. Start a risk-free 30-day trial to experience the power and flexibility of JointJS+.

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.

Software Ideas Modeler serves as a vital resource for professionals in the field of software engineering. This comprehensive CASE tool provides an array of features that assist in software design through various diagram types and modeling capabilities. You can explore our UML modeler, ERD designer, flowchart creator, wireframing tools, and BPMN editor without any cost. Each diagramming module is tailored to address specific tasks within its respective domain. With tools for UML diagrams, Layer diagrams, Flowcharts, and Data Flow Diagrams, among others, you can effectively design your software or its essential components. Additionally, our documentation and glossary features facilitate clear communication of your design concepts. Utilize Advanced Use Case analysis or User Stories to methodically process user requirements based on your preferred approach. Furthermore, the code analytic tools allow you to convert code into diagrams for various popular programming languages. You can also generate source code scaffolds and individual code segments through our source code generators, which can be customized with specific code templates. By incorporating these tools, you can enhance both your design process and overall software development efficiency.

Visualize your thought process in real-time collaboratively, catering to strategists, educators, technologists, designers, policy makers, and various thinkers! Drawing from extensive research on cognition and learning, Plectica mimics the human brain's function by visually arranging components that can be linked together to create a holistic understanding. Whether you are mapping out an internal process, brainstorming innovative ideas, or facilitating the onboarding of new staff, our goal is to empower you to better organize and share your ideas. Plectica taps into the expansive field of Plectics, which investigates the essence of complex systems where simple principles give rise to the everyday complexities we face. By transforming how information is visualized and interconnected, Plectica enables individuals and teams to systematically organize, elucidate, and collaborate on intricate data. Ultimately, Plectica clarifies your projects, whether you're working on internal diagrams, developing new products, or integrating new team members, ensuring that everyone is on the same page. This approach not only enhances understanding but also fosters a culture of collaboration and innovation.

Develop clear and coherent process diagrams that ensure every member of your organization comprehends the workflow seamlessly. Establish a centralized Process Repository, providing your team with a singular source of truth for all process documentation. With TeamFlow®, your diagram serves as more than just a visual representation; it acts as a comprehensive graph data model of your operations. Utilizing a universal data model, TeamFlow® transcends mere imagery, allowing you to dive in and craft your process diagram in just seconds. You can easily drag and drop elements such as tasks, meetings, and decisions, bringing your workflow to life with ease. Visual clarity is achieved through clean shapes and colors, ensuring that all individuals in your organization grasp the flow of processes without difficulty. Moreover, TeamFlow® features a straightforward design language, guaranteeing a uniform appearance for your process diagrams every time. Additionally, TeamFlow® prioritizes privacy and security at all levels, providing peace of mind for your organization's sensitive information. This comprehensive approach ensures that your team can work collaboratively and efficiently, leveraging every diagram to its fullest potential.

Develop a visual representation and diagram of your team's key processes to enhance comprehension and optimize your business workflows. This approach facilitates the onboarding of new team members, encourages cross-functional collaboration, and ensures that stakeholders have appropriate visibility into the operations that fuel your productivity. Work alongside your team to define essential processes and pinpoint opportunities for automation or workflow optimization through AI-driven insights. Whether in real-time or through asynchronous collaboration, plan, construct, and visualize workflows with your colleagues, while incorporating notes and context to enable ongoing iteration and maintaining access control to prevent unintended modifications. Gain a comprehensive understanding of how your workflows, applications, and team members interconnect. Finally, share your diagrams and provide insights into the applications and automations that drive your business, all consolidated in one accessible platform, fostering a more efficient working environment. By creating this centralized overview, you can identify bottlenecks and improvements that may not have been visible before.

DrawExpress is an efficient application designed for gesture recognition that allows users to create diagrams and flowcharts effortlessly. This tool offers a straightforward and intuitive interface, making the process as easy as sketching with a pen on paper. Regardless of whether you are involved in software development, financial planning, business operations, legal documentation, or academic projects, DrawExpress serves as the perfect answer to all your diagramming requirements. Its versatility and user-friendly design set it apart as an indispensable resource for professionals and students alike.

Create complex diagrams using markdown code and collaborate in real-time with your team. Text-based diagramming simplifies documentation processes and improves workflows. You can create projects with the Teams feature and invite members. This allows sharing across your organization, ensuring a single source for truth and improving productivity. Mermaid Chart’s visual editor will take your diagramming to a new level. Mermaid Chart offers a 14-day trial of its newly-launched Pro tier. Text can be used to create complex visual diagrams. This is a more intelligent way to create diagrams. Add styling to your diagram with the init directive to align it with your project's colour scheme. Create a variety of charts and diagrams using Markdown code. Mermaid Chart allows you to share across your organization, ensuring a single source truth. This simplifies collaboration and enhances productivity.

Heptabase allows you to visually organize and comprehend your learning, research, and projects. To fully grasp what you've absorbed, you can visualize your notes using whiteboards, sections, and mind maps. Consolidate all your highlights, annotations, PDFs, journals, and research notes in one place to uncover new insights. Tackle intricate projects with ease and adaptability through the use of robust tags and properties. Moreover, it offers full offline access with impressive speed. You can sync and access your notes across multiple desktop and mobile devices, as well as web browsers. Access all your notes and files without needing an internet connection, and enjoy the ability to search, load, and edit your notes swiftly. Heptabase is designed as a visual note-taking tool specifically aimed at enhancing your ability to learn and delve into complex subjects, fostering a profound understanding of the topics that matter to you. Its design philosophy emphasizes aiding you in "understanding the topics you care about," rather than merely focusing on "taking more notes," making it a valuable resource for learners.