Free Wireframe Tool: Sketch UI Ideas in Your Browser

A free wireframe tool should let you sketch a screen idea in five minutes without creating a team, joining a workspace, or discovering the export button costs money. ClipCraft's Mock Up is exactly that scope on purpose: a Figma-style canvas with 41 parametric stencils, eight device frames, a hand-sketched aesthetic you can toggle off, and crisp PNG and SVG exports, running entirely in your browser with nothing uploaded anywhere. It wears an alpha badge honestly, and what's there already covers the wireframe-to-share loop.

Five minutes to a first screen

Starting a new project seeds an example iPhone screen so you're never staring at a blank canvas: a status bar, search bar, three list rows and a tab bar, each one a real stencil you can pick apart in the layers panel. From there it's the direct-manipulation loop you'd expect: drag stencils in, move things with red snap guides and pixel-gap readouts, resize and rotate with a proper gizmo, group with Ctrl+G, and reorder or lock things in the layers panel. The canvas is infinite, zooms from 2 to 1600 percent, and pans with space-drag.

The stencil library does the drawing

The 41 stencils cover the things you actually put in wireframes: buttons, inputs, checkboxes, toggles, sliders, dropdowns, search bars, progress bars, rating stars, navbars, tab bars, breadcrumbs, pagination, sidebars, cards, list rows, tables, modals, accordions, avatars, and image and video placeholders. They're parametric rather than pictures, so a resized table grows rows sensibly, and every one renders in both the sketch style (a stable, seeded wobble, so shapes don't re-jitter every frame) and a clean style, toggled per document. You can also save any selection as your own stencil and reuse it.

Sketch style is a communication tool

The hand-drawn look isn't decoration; it's expectation management. Show stakeholders a pixel-perfect gray mockup and they debate button colors; show them a sketch and they debate the flow, which is the conversation a wireframe exists to have. When the idea graduates, one toggle re-renders the whole document clean, and the export becomes presentable enough for a deck.

Exports, and the open-format promise

• PNG at 1×, 2× or 3×, re-rendered at full resolution (never a stretched screenshot), with transparent backgrounds and per-frame or selection scopes.
• SVG with real vectors for the shapes and text.
• A .mockup.json download: the entire document in an open, readable format you can re-import, diff in git, or parse yourself. Downloads and imports are free, no tokens, deliberately.

PNG and SVG exports spend the standard small tool charge (2 tokens on the free plan, 1 on Saver, none on Creator or Studio, per the pricing page), and projects auto-save to your account with a two-second debounce, the same system the editors use. The public tool page works signed out for trying it; saving is what wants the free account.

What the alpha badge means

Honesty about the edges: there are no click-through prototype hotspots yet, no PDF export, no auto-layout, no multiplayer, and the style panel does one corner radius per shape rather than four. If your team lives in shared Figma prototypes, this won't replace that today. If your need is "get the idea out of my head, aligned, and exported," which is most wireframing, it already does the whole job without a seat, a workspace, or a trial clock.

Sketch the screen you've been describing in meetings. A free account keeps the project; five minutes gets the first frame; and if you need the artwork half of a design rather than the boxes, the image tools and PDF builder live one menu over.