How to use the image converter
- Choose one or more images (PNG, JPG, WebP, GIF, BMP or AVIF if your browser can read it).
- Pick the target format.
- For JPG or WebP, adjust quality if you like; PNG is always lossless.
- Click “Convert”, then download each file or all of them.
How it works
The browser decodes your file into raw pixels, which are drawn onto a canvas and encoded again in the chosen format with canvas.toBlob. PNG output is lossless, so converting to PNG never loses detail (though files may be large). JPG and WebP output are lossy at the chosen quality.
JPG has no alpha channel. If you convert a transparent PNG to JPG directly, transparent pixels usually turn black. To avoid that, the tool first fills the canvas with white and draws your image on top, so transparent areas become white.
Worked example
A logo saved as a 600 × 600 PNG with a transparent background, converted to JPG at 90%, comes out with a white background instead of black. Converted to WebP, the transparency is kept, and the file is typically far smaller than the PNG.
Limitations
- Only formats your browser can decode can be opened; HEIC from iPhones is not supported by most browsers.
- Output is limited to PNG, JPG and WebP, the formats every modern browser can encode.
- Metadata (EXIF, colour profiles) is not carried over.
- Animated GIFs become a single still frame.
Frequently asked questions
Why does my JPG have a white background?
JPG cannot store transparency. Rather than letting transparent pixels turn black, the converter fills them with white. Choose PNG or WebP to keep transparency.
Does converting JPG to PNG improve quality?
No. PNG preserves exactly what is in the JPG, including its compression artefacts. It just stores it losslessly, usually in a bigger file.
Can I convert HEIC photos?
Only if your browser can open HEIC, which currently is mainly Safari on Apple devices. Elsewhere, export the photo as JPG from your phone first.
Is WebP safe to use on websites?
Yes. WebP is supported by all current versions of Chrome, Edge, Firefox and Safari. Keep a JPG copy if you also need to support very old browsers or software.