Free browser tools for the assets around your web app
An installable app needs more than code: icons that survive Android's masks, screenshots for the manifest's richer install dialog, a QR code that gets the app onto a phone from a poster. Each tool below does one job, runs entirely in your browser, and has a guide underneath explaining the specs it targets.
Web app icon resizer
One upload → every manifest, Apple touch and Android icon size, with a maskable preview.
Screenshot mockup generator
Phone frames, captions and 3D tilt for manifest screenshots and landing pages.
QR code generator for your install link
A scannable code for your install page or Play listing, styled to your brand.
Colour palette extractor
Dominant colours from your logo, as hex and CSS — and which one to use for theme_color.
App description writer
Starter copy for the manifest description, install page and Play listing, within character limits.
Feature graphic maker
A 1024×500 banner with your icon and headline for Play listings and install pages.
Store listing preview
Preview the Play listing — icon, title, short description, screenshots — before submitting.
Social media kit generator
Open Graph, Instagram, X and LinkedIn graphics from one design.
Promo video and GIF maker
Animated device preview as WebM or GIF for install pages, social and a Play promo video.
How these tools handle your files
Every tool works on an HTML canvas in your browser. The image you drop in is read into memory, transformed, and offered back as a download. There is no upload step, no processing server and no retention. Close the tab and it is gone. If you are working with an unreleased design that is exactly the property you want.
Why they exist alongside the builder
The PWA builder generates icons from one upload, but the surrounding work — checking how a logo looks inside a circle, framing screenshots for a landing page, giving a printed QR code enough contrast to scan — kept coming up in support email. So we built the tools we were describing in replies.