VKT ImageConv
Convert images between PNG, JPG, WEBP, AVIF locally. Zero data upload.
π Free Features
- Convert to PNG (lossless), JPG (high quality), WEBP (compact), AVIF (best compression)
- Right-click context menu: Save as PNG/JPG/WEBP/AVIF
- Copy as PNG/JPG/WEBP/AVIF to clipboard
- File size comparison toast notification
- Adjustable quality sliders for JPG/WEBP/AVIF
- Smart link cleaning (strips CDN tracking params)
- Drag & drop local files onto popup
- Cross-origin image support via Service Worker
- JPG white fill for transparent backgrounds
- Duplicate click guard (2s debounce)
- Large image handling (>20MB async indicator)
β Advanced Features (License)
Monthly $3.99/mo or One-Time $14.99 via Creem
- Batch convert multiple images at once
- Export all images from a webpage in chosen format
- Advanced quality presets (web/email/print)
- Priority support
Installation
- Visit the Chrome Web Store page for ImageConv
- Click Add to Chrome and confirm
- Click the ImageConv icon in your toolbar to start using
Usage
- Right-click: Any image β ImageConv β Save as / Copy as β choose format
- Drag & drop: Click icon β drag local file β select format β auto download
- Quality: Open popup β adjust sliders β settings saved automatically
How It Works
Right-click image β Service Worker fetches image blob β Sends to Offscreen Document (Canvas API) β Exports as target format β Download or clipboard β Destroys all temporary resources.
Uses Chrome's Offscreen API because Manifest V3 Service Workers have no DOM access, but Canvas API requires a DOM.
Privacy
- β Zero data upload β all processing in browser memory
- β No analytics, no tracking, no remote calls
- β No cookies
- β Temporary memory only β images destroyed after conversion
- β
Minimal permissions:
contextMenus,downloads,offscreen,storage,clipboardWrite
Install from Chrome Web Store
Unlock Premium
View on GitHub
GitHub repository only contains readme documentation for reference. No offline installation packages, source code for end users are not provided. Official installation channel is Chrome Web Store only.
For questions or support, email [email protected]