Convert Images Between JPG, PNG & WebP — Free & Private
A fast, browser-based image format converter. Batch convert images between the three most common web formats, adjust quality, and download instantly. No uploads, no watermarks, no limits.
1. When to Use Each Format
JPG is best for photographs and complex images with many colors — small file size but no transparency. PNG is ideal for logos, icons, and images with transparency or sharp edges — lossless but larger files. WebP is the modern format: smaller files than JPG with transparency support, but older browsers may not display it.
2. How the Converter Works
Each image is drawn onto an HTML5 canvas at its original resolution, then re-encoded in your chosen format using the browser-native canvas.toBlob() API. For JPG output, a white background is painted behind transparent pixels so they do not turn black. The quality slider maps to the browser compression level for lossy formats.
3. Batch Conversion & ZIP Download
Upload up to 20 images at once, choose a target format, and process them all in a single click. Download each converted image individually, or grab them all as a single ZIP archive using the in-browser JSZip library — no server required.
4. 100% Private & Client-Side
Every pixel stays on your machine. The tool uses only the browser's Canvas API and a ZIP library that runs locally. Sensitive photos, scanned documents, and design assets never touch a network.
Every Format, Without the Upload
Done right, the whole operation takes seconds, runs entirely in your browser, and never uploads a byte of your input. For convert Images Between JPG, PNG & WebP — Free & Private — or anywhere a precise, in-browser result beats a heavier install — this tool is the right one.