All-in-one prototyping tool
for web and mobile apps

From wireframes to highly interactive prototypes


Easily design fully-interactive prototypes

Design from scratch. From clickable wireframes to completely interactive prototypes. We provide a full range of web interactions and mobile gestures, so that you can focus on creating delightful user experiences.

Visual Design

You can design the style, size and layout distribution of any UI element to fit the look and feel of your screens.

Web interactions

Design web experiences with a full range of interactions, animations and transitions. Create anything from simple links to advanced interactions.

Mobile gestures

Choose from a ton of gestures that allow you to rotate, tap, swipe, scroll and pinch your way through your mobile app prototype.

Responsive prototyping

Create wireframes for websites and web apps that adapt to multiple screen resolutions for desktop and mobile. The UI elements in your screens will also adapt automatically. One free prototyping tool to rule all devices!

Liquid layouts

Define liquid containers to allow elements on a page adapt to different screen sizes, orientations, or aspect ratios.

Auto-resize UI components

Auto-resize automatically resizes groups of elements on your pages, saving you from multiple changes and letting you focus on creating.

Advanced pinning

Fix the position of objects in containers or screens. Combine the power of pinning with an offset to create responsive experiences.

Forms and data in motion

Prototype smart forms and data lists, and test them instantly without writing a single line of code. You can also design conditional navigation flows for advanced user journeys.

Prototyping forms interaction

Define interactions and validations for form fields: input, drop-downs, radio buttons...

Data lists and grids

Design data visualization. Data lists can be dynamic and use data to help user testing.

Bring your prototypes to life in a click

Visualize your web and mobile prototypes, while you design them. Test your designs with users.

Instant preview

Simulate prototype behavior while you design. Save time on your creations!

View on device

Use our viewer to test your prototype live on any iPhone, iPad or Android device.

Export to HTML

Export your prototype to a fully functional and interactive HTML.

Free UI kits for web and mobile

Speed up your design process with ready-made and frequently updated UI kits. You can also create your own UI kits with personalized components

Websites and web apps

Use UI kits for wireframing and prototyping with interactive components

Mobile apps

Find iOS and Android components pre-installed in the Justinmind free prototyping tool.

Diagramming, Sketching and more

You’ll also find UI kits for flowcharts, sketching, Salesforce, Oracle and many more.

Design Systems

Keep consistency in your Style Guides, UI component libraries, interactions, templates and other deliverables. Share your assets with design teams, business analysts and developers.

Create your own UI Kits

Easily refine and reuse the built-in libraries or create your own. Personalize them with your own style and interactions.

Share and sync UI components

Centralized management for your UI kits. Maintain your UI elements and style guides synchronized across all your teams.

Export to HTML

Export your prototype to a fully functional and interactive HTML.

A free prototyping tool to rule all screens

It's easy to get started and it's Free!


Collaborate on your prototypes

Validate early and often. Allow all your stakeholders to test and review your prototype, leaving no room for misunderstandings. Improve communication between teams, putting them all on the same page.

Share and get feedback

A single click lets you publish your prototypes and invite all project stakeholders to give feedback early on.

Team prototyping

Multiple users can work on or edit the same prototype simultaneously. Our version control system tracks the changes.

Design handoff for developers

Say goodbye to time-costly communication breakdowns. With our developer-friendly viewer, design-development collaboration is stress-free. Developers can inspect prototypes and get assets. Keeping developers in the loop means your designs get built pixel perfect.


Instantly export your project to clear specifications documents, along with the visuals needed for easy interpretation. All the information in your prototypes can be exported to customizable documents. You can even create customized document templates.

Export documentation

With a single click, generate specifications documents from your prototypes.

Manage requirements

Add and manage text requirements within the UI prototype and integrate the requirements in your preferred Agile tool.

Customize deliverables

Create your own specifications document templates or use our API to generate the assets you need.

We love your agile and design tools

By combining Justinmind’s prototyping strength and your current design, agile and user testing tools, you’ll be able to rapidly build engaging prototypes for real users to test drive. Bring your designs to life right now!


Import your designs from Sketch into Justinmind and add interactions, effects and transitions

Adobe Suite

Edit images in Illustrator or Photoshop and see those edits reflected instantly in your interactive prototypes

Atlassian JIRA

Justinmind’s powerful JIRA integration means you can streamline information and break down silos

Microsoft TFS

Import and export work items from Microsoft TFS to Justinmind

User Testing

Record user's reactions as they test the prototype


Know how real users interact with prototypes

Validate early, prototype better, communicate faster

Try the most powerful prototyping tool!