Format Converter
Canvas APIConvert between JPG, PNG, WebP, AVIF
Drag & drop files here, or click to select
Supports JPG, PNG, WebP, AVIF, BMP and other common formatsHow to Use
- Click the area above to select a file, or drag and drop a file onto the page
- Adjust parameters in the settings area
- Click the process button and download the result when ready
Frequently Asked Questions
How It Works
The Image Format Converter uses the HTML5 Canvas API to decode source images and re-encode them to target formats. The Canvas 2D context renders the source image, and canvas.toBlob() or canvas.toDataURL() exports to the desired format.
The conversion pipeline: (1) The source image is loaded as an ImageBitmap or HTMLImageElement. (2) A Canvas element is created at the target dimensions. (3) The image is drawn to the Canvas using drawImage(), which handles format decoding internally via the browser's codec support. (4) The Canvas exports to the target format: JPEG (quality parameter 0.0-1.0), PNG (lossless), WebP (modern compression), or AVIF (next-gen compression).
For AVIF support, the tool may use the OffscreenCanvas with AVIF encoder or a WebAssembly-based encoder. The optional resize parameter scales the image proportionally to fit within the specified maximum dimensions during conversion.
Tips & Best Practices
- WebP for web: WebP files are 25-35% smaller than JPEG at equivalent quality — always prefer WebP for web delivery.
- PNG for transparency: Only use PNG when you need alpha transparency. For opaque photos, JPEG or WebP are much smaller.
- JPEG quality 80-85%: The sweet spot where file size drops dramatically with minimal visible quality loss.
- AVIF for best compression: AVIF offers 50% better compression than JPEG, but check browser compatibility for your audience.
- Resize during conversion: If you need a smaller image anyway, resize during the format conversion to avoid double-processing.
- Batch conversion: Open multiple tabs for parallel processing of multiple images, as each conversion is independent.
Use Cases
Web developers converting PNG screenshots to WebP for faster page loads and better Core Web Vitals scores.
E-commerce managers converting product photos from camera RAW exports to optimized JPEG for product listings. Social media managers converting images to platform-optimized formats for best quality-to-size ratio. Photographers batch-converting high-resolution TIFF files to web-ready JPEG for client proofing galleries. App developers converting design assets to WebP for reduced app bundle size. Content creators converting transparent PNGs to JPEG for platforms that don't support transparency.