About Window Mockup Generator
Plain screenshots look unfinished. Wrap them in a window frame and they suddenly look like polished marketing assets, ready for a landing page, a tutorial blog post, or a Twitter announcement. The Window Mockup Generator wraps any screenshot in a macOS browser frame, a Windows browser frame, a macOS terminal frame, or a minimal frame — your call. Customise the shadow softness, the outer padding, the background colour, and (for browsers) the URL shown in the address bar. Export as a high-resolution PNG that scales cleanly to any width.
- No uploads
- Browser-only
- Works offline
- 100% free
How it works
- 1
Drop your screenshot
Any size, any format your browser can decode. The screenshot dimensions become the inner content area.
- 2
Pick the chrome
macOS browser, Windows browser, macOS terminal, or a minimal frame. Each is rendered procedurally — no SVG assets, infinite scaling.
- 3
Tune and export
Adjust outer padding, shadow blur, background colour, and the address-bar URL. Export as PNG with the full canvas size.
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Frequently asked questions
Are my files uploaded to a server?
No. Every tool on SnapToolz runs entirely inside your browser using JavaScript and WebAssembly. Your file is read locally, processed in memory, and the result is offered as a download. Nothing is sent to a server — there isn't one to send to.
What's the largest screenshot the tool can wrap?
Practical limit is your device's memory. The canvas needs to hold the screenshot dimensions plus padding plus shadow blur — a 4K screenshot in a frame uses roughly 50 MB of canvas memory. Modern laptops handle this comfortably; older phones may struggle.
Can I add my own logo to the address bar?
Not directly. The address bar accepts custom URL text only. For a logo overlay, export the mockup and add the logo with the Screenshot Annotator's text/image tools (image-overlay support is coming).
Why is the macOS frame's traffic-light colour palette mine to choose?
macOS lets users tint the traffic lights in System Settings (graphite, etc.). The customisable picker lets you match your brand's colour or replicate a specific aesthetic. Default is the standard red/yellow/green.
Does it work offline?
Yes. SnapToolz is a Progressive Web App. After your first visit, the app is cached on your device and every tool keeps working without an internet connection.
Is SnapToolz free?
Yes — every tool is 100% free with no sign-up, no watermark, no hidden tier. The whole platform is open source and we have no plan to gate features.