About CWS Kit
A free tool built for Chrome extension developers who'd rather spend time building than wrestling with image dimensions.
Why CWS Kit exists
Publishing a Chrome extension requires a surprising number of image assets: icons at four sizes, screenshots at specific dimensions, and promotional images in three formats. Most developers cobble together these assets using Figma, Photoshop, or Canva — none of which know about Chrome Web Store requirements.
CWS Kit solves this by being purpose-built for Chrome Web Store assets. Every canvas, every export, every dimension is pre-configured to match exactly what the Chrome Web Store expects. No guessing, no resizing, no spreadsheets of pixel values.
Principles
Privacy first
Your images never leave your browser. All data is stored locally — no servers, no accounts, no tracking.
Free forever
There is no premium tier, no trial, and no feature gating. The tool runs entirely client-side, so there are no server costs to pass along.
Purpose-built
CWS Kit is not a general-purpose design tool. Every feature, dimension, and export format is optimized for one job: Chrome Web Store listings.
Tech stack
CWS Kit is built with React, TanStack Start, Tailwind CSS, and Konva for the canvas editor. The entire application runs in your browser — the server only delivers static assets. All your data persists locally between sessions.