ImageConv

VKT ImageConv

Convert images between PNG, JPG, WEBP, AVIF locally. Zero data upload.

Chromium · MV3 · Local Only

🆓 Free Features

  • Right-click context menu: Save as / Copy as PNG/JPG/WEBP/AVIF
  • File size comparison toast (original vs converted, savings %)
  • Adjustable quality sliders for JPG/WEBP/AVIF
  • Smart link cleaning — strips CDN tracking params for original quality
  • Cross-origin image support via Service Worker
  • JPG white fill for transparent PNG backgrounds
  • Duplicate click guard (2s debounce)
  • 6-language UI (EN/ES/DE/JA/FR/ZH)

⭐ Premium Features (License Required)

Monthly $2.99/mo or One-Time $9.99 via Creem

  • Drag & Drop conversion — drop local image files onto the popup for instant format conversion
  • Batch local conversion — convert multiple local files at once
  • Priority support

Installation

  1. Visit the Chrome Web Store page for ImageConv
  2. Click Add to Chrome and confirm
  3. Click the ImageConv icon in your toolbar to start using

Usage

How It Works

Right-click image → Service Worker fetches image blob → Sends to Offscreen Document (Canvas API) → Exports as target format → Download or clipboard → 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

  • ✅ Zero data upload — all processing in browser memory
  • ✅ No analytics, no tracking, no remote calls
  • ✅ No cookies
  • ✅ Temporary memory only — images destroyed after conversion
  • ✅ Minimal permissions: contextMenus, downloads, offscreen, storage, clipboardWrite
Install for Chrome Install for Edge 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]