Supported image formats
How to convert images
Upload image
Choose or drag an image. A preview appears instantly.
Choose format and adjust
Choose output format, quality, size, rotation, and filters.
Download
Pillow converts on the server. Download the finished image.
Frequently asked questions
What's the best format for websites?
WebP is recommended for modern websites β 25β35% smaller than JPG at the same quality. All modern browsers support it. For transparency, choose WebP or PNG.
Can I convert HEIC images from iPhone?
Yes! Upload HEIC files from your iPhone and convert them to JPG or PNG for universal compatibility.
Do I lose metadata (EXIF) during conversion?
EXIF data (camera info, GPS) is kept for JPG. For PNG and WebP, EXIF is removed for privacy.
What happens to transparency (PNG alpha) during JPG conversion?
JPG does not support transparency. Transparent areas are automatically replaced with a white background. Choose WebP or PNG to keep transparency.
Can I resize without losing aspect ratio?
Yes, "Keep aspect ratio" is enabled by default. The image is scaled proportionally within the given dimensions.
What is an image converter?
An image converter changes a file's format, size, and compression. Konvertio uses Pillow β Python's most popular image library β supporting JPG, PNG, WebP, GIF, TIFF, BMP, ICO, and HEIC (iPhone photos).
When should you convert images?
- JPG to WebP β reduce file size by 25β35% for faster websites
- PNG to JPG β when you don't need transparency and want smaller files
- HEIC to JPG β convert iPhone photos to a universal format
- Image optimization β komprimer bilder for e-post og sosiale medier
- PNG to ICO β lag favicon til nettsiden din
Related services
Need more than image conversion? See also: Video Converter Β· Document Converter (PDF, Word) Β· Pricing and API