About MockupStack

MockupStack is a free, browser-based app store screenshot generator built for iOS and Android developers, product managers, and App Store Optimization (ASO) specialists who need professional-quality mockups without design software.

The tool runs entirely in your browser. Your screenshots, images, and compositions never leave your device - there are no server uploads, no tracking of image data, and no account required. Processing is handled using the browser Canvas API and Web Workers, which keeps the interface fast even when rendering multi-scene export sets.

MockupStack exports each scene at 2560×1920 pixels - the maximum resolution accepted by Apple App Store Connect for 6.5-inch displays and by Google Play Console for phone screenshots. A full set of scenes can be downloaded as individual PNGs or bundled into a single ZIP, ready for direct upload to your distribution platform.

Part of the ImageAndPDF.com suite

MockupStack is developed and maintained by the team behind ImageAndPDF.com, a suite of 70+ free browser-based tools for working with images and PDF files. All tools in the suite share the same philosophy: fast, private, and accessible without an account or subscription.

Contact

For feedback, bug reports, or feature requests, please reach out via the contact form at imageandpdf.com.