Image Format Converter
Convert image formats between PNG, JPEG, and WebP
How to Use
- Select an image
Choose an image file from the toolbar file input. The source format is auto-detected.
- Choose target format
Select the target format (PNG/JPEG/WebP) from the toolbar. Quality can be adjusted for JPEG and WebP.
- Convert and download
Click "Convert" to see the preview and size comparison. Use the download button to save.
Image Format Converter Examples
PNG to JPEG
Non-transparent PNG (2MB)JPEG image (300KB, 85% reduction)Converting photo PNGs to JPEG dramatically reduces file size.
JPEG to WebP
JPEG image (500KB)WebP image (200KB, 60% reduction)WebP offers better compression than JPEG, improving website speed.
Features
- Cross-format conversion between PNG/JPEG/WebP
- Auto-detect source image format
- Quality adjustment for JPEG/WebP output
- File size comparison before and after conversion
- Preview of converted image
- One-click download
- Local processing (images never leave your device)
FAQ
What happens when converting a transparent PNG to JPEG?
JPEG does not support transparency, so transparent areas will be replaced with a white background. Use PNG or WebP to preserve transparency.
Which format produces the smallest file size?
Generally WebP is the most efficient. For photos, JPEG/WebP works best. For illustrations, text, and transparent images, PNG/WebP is recommended.
Are images uploaded to a server?
No. All format conversion uses the browser Canvas API. Image data is never transmitted externally.