Mockup Editor

A lightweight mockup editor for designers and product teams to rapidly prototype UI layouts and screen flows in the browser.

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About This Tool

Purpose-built for design teams, this tool provides a canvas to model UI screens and user flows without code. It emphasizes vector shapes, layered compositions, and export-ready layouts for handoff. Conceptually, users define screen canvases, place abstract UI regions, and group related elements to reflect intended interactions. The core value lies in fast iteration, early feedback, and platform-agnostic visuals that communicate requirements to developers and stakeholders. Core features enable creating a canvas with pixel dimensions, adding simple primitives, organizing layers, and exporting assets in PNG, SVG, or PDF. Unlike full IDEs, it remains lightweight, focusing on clarity of layout and flow rather than interactivity or executable code. Use cases include web and mobile UI planning, design reviews, and stakeholder sign-offs. Unique value comes from a minimal, fast path for producing shareable visuals that resemble final screens, without the overhead of tooling tied to a single design system. Typical workflows: start with a canvas size, sketch screens using rectangles and circles to denote content zones, group elements into screens, export for review or handoff, and iterate after feedback.

How to Use

  1. Define canvas size and export format to match target devices.
  2. Create screens by adding shapes that represent content areas and controls.
  3. Organize elements into layers and group related items for each screen.
  4. Export assets (PNG/SVG/PDF) or generate a layout JSON for handoff.
  5. Iterate by refining shapes and re-exporting after feedback.
How to use online mockup editor free

Frequently Asked Questions

Find Quick Answers

What can I prototype with this tool?
You can rapidly prototype UI screens and user flows for web and mobile. It focuses on visual composition and layout without coding, suitable for early discovery and reviews.
What exports are supported?
Exports include PNG, SVG, and PDF. You can also generate a JSON layout export to share structure and layer information with teammates.
Can I collaborate with others?
The tool supports shareable links to view layouts. Real-time multi-user editing is not included in this version, but links facilitate stakeholder review.
Is it free and how is it hosted?
The editor runs in a web browser with no installation. Some advanced templates or exports may require sign-in, but core prototyping remains accessible in-browser.

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