Design Mockup Generator

Drop, upload, or paste an image and instantly place it into a web browser or phone frame, rendered in Light, Dark, and Gradient themes. Download high-resolution PNG mockups. 100% in your browser.

What is Design Mockup Generator?

A Design Mockup Generator takes a flat screenshot or design and presents it inside a realistic device frame—a browser window or a smartphone—on a styled background, so it looks polished and ready to share. Designers, marketers, and developers constantly need these "in-context" images for portfolios, landing pages, App Store and Play Store listings, social posts, pitch decks, and client presentations. A raw screenshot looks unfinished; the same screenshot inside a clean browser chrome or a phone bezel instantly reads as a real product. Traditional workflows require Photoshop mockup templates, Figma plugins, or paid online services that upload your image to their servers. This tool does all compositing locally with the HTML5 Canvas API: it draws a themed background, a soft drop shadow, the device chassis, and fits your image into the screen area (object-fit: cover), then exports a crisp PNG at 1x or 2x (Retina) resolution. It supports four targets—a web browser window, a mobile phone, an A4 print sheet, and a book cover—so you can go from screenshot to a polished set of on-brand mockups in seconds without leaving the page.

How to Use Design Mockup Generator

Add your image three ways: drag and drop it onto the upload area, click to browse, or copy a screenshot and press Ctrl/⌘ + V to paste it directly. Once loaded, choose a target with the toggle—Web browser (a macOS-style window with an address bar) or Mobile (a phone frame with a notch). Pick an output resolution: 1x for quick previews or 2x for crisp, Retina-ready exports. The tool automatically renders your image in three themes side by side: Light (clean neutral background), Dark (deep background with strong contrast), and Gradient (a vivid indigo-to-violet backdrop). Click "Download PNG" under any theme to save just that one, or "Download all" to grab every theme at once. Switch the target or resolution at any time and the previews regenerate instantly.

FAQ

Is my image uploaded to a server?

No. Every step—loading the image, drawing the frame, and exporting the PNG—runs entirely in your browser using the HTML5 Canvas API. Your image never leaves your device, so it is safe for confidential product screenshots, unreleased designs, and client work.

Which mockup styles are generated?

For each target the tool produces three color themes: Light (a soft neutral background), Dark (a deep charcoal/navy background with a stronger shadow), and Gradient (an indigo-to-violet gradient). The device frame itself—browser window, phone, A4 sheet, or book cover—stays the same; only the background tone and shadow change so you can match different brand looks.

What targets are supported?

Four targets are supported: a web browser window (with address bar), a mobile phone frame (with a notch), an A4 print sheet (210×297mm portrait), and a book cover (6×9in trade size). Each is rendered in the Light, Dark, and Gradient themes.

What resolution are the exported images?

All exports are PNG. At 2x: the web mockup is about 2720px wide and the mobile about 1160px wide. The A4 sheet itself renders at 2480×3508px (300 DPI, print-ready), and the book cover at 1800×2700px (300 DPI) — both sit inside a slightly larger backdrop. Use 2x for print and presentations, 1x for quick previews. Note that in Adaptive fit mode the frame is resized to your image's aspect ratio, so exact pixel dimensions vary.

How is my image fitted into the frame?

You choose with the Fill / Fit / Adaptive toggle. Fill scales the image to cover the frame (may crop). Fit shows the whole image inside the fixed frame and fills the leftover area with a letterbox band whose color you can set to white, gray, or black. Adaptive resizes the frame itself to your image's aspect ratio, so there is no crop and no letterbox. Fill and Adaptive work best when the image roughly matches the frame; Fit is safest when the entire image must be visible.