Image format converter

Different situations call for different image formats. A website wants WebP for speed, an older system only accepts JPEG, and a design with transparency must stay PNG. This converter changes an image's format directly in your browser, lets you set the quality for lossy formats and shows the resulting file size.

How to use it

1. Choose an image.
2. Select the target format: PNG, JPEG or WebP.
3. For JPEG and WebP, adjust the quality.
4. Preview the result, compare file sizes and download.

When to use each format

• PNG: lossless and supports transparency. Best for logos, icons, screenshots, diagrams and images with text.
• JPEG: lossy, no transparency, universally supported. Best for photographs when compatibility matters.
• WebP: lossy or lossless with transparency, usually 25 to 35% smaller than JPEG. Best default for the web today.

Examples

• A 1.8 MB PNG screenshot of a photo-heavy web page converted to WebP at quality 80 may drop to about 200 KB.
• A logo PNG with a transparent background converted to JPEG gets a solid (usually black or white) background, because JPEG cannot store transparency.
• A JPEG converted to PNG becomes larger without any quality gain, because the lost detail cannot be restored.

Tips

• Convert from the highest-quality original you have.
• Do not convert lossy to lossless expecting better quality; it only increases size.
• Resize oversized images as well; format alone cannot fix a 6000-pixel photo shown at 600 pixels.

The conversion uses the browser canvas, so files are never uploaded.