Building a Chrome extension is the easy part. Getting people to actually install it? That's where most of us get stuck.
Here are 5 free tools I honestly wish I had when I started.
1. Screenshot Makeup
This tool transforms basic screenshots into professional looking Chrome Web Store listings. You can add device frames like MacBook, Chrome browser, and iPhone. There are around 50 gradient backgrounds to pick from, plus text overlays. Everything exports at the exact Chrome Web Store sizes.
Try it here: extensionbooster.com/tools/screenshot-makeup
2. Icons Generator
Chrome requires 4 icon sizes: 16, 32, 48, and 128 pixels. Instead of manually resizing in Figma or Photoshop, just upload one image and get all 4 sizes in one click.
Try it here: extensionbooster.com/tools/extension-icons-generator
3. MV2 to MV3 Converter
Manifest V2 is being deprecated and the migration is genuinely painful. This tool lets you paste your MV2 JSON and get the MV3 output with migration notes explaining each change. Saves hours of manual conversion.
Try it here: extensionbooster.com/tools/mv2-to-mv3-converter
4. Chrome Extension Review Downloader
You can export any extension's reviews to CSV, Excel, or JSON format. It's incredibly useful for competitive analysis and understanding what users actually love or hate about similar extensions in your space.
Try it here: extensionbooster.com/tools/download-reviews
5. Tile Cropper
This one crops images to the exact Chrome Web Store tile dimensions. Small tile is 440x280, marquee is 1400x560. No more guessing pixel sizes or doing math in your head.
Try it here: extensionbooster.com/tools/tile-cropper
All of these were built by ExtensionBooster.com, a platform that helps indie Chrome extension developers actually get discovered.
What tools are in your extension development toolkit? Drop them in the comments, I'm always looking for new ones.
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