Image Converter
Convert images between WebP, JPEG and PNG.
Runs in your browser — your files never leave your device.
Save this tool
Keep Image Converter handy
Use your browser's Share menu, then “Add to Home Screen”.
PNG is lossless, so the quality setting doesn't apply.
Working…
JPEG can't store transparency, so any transparent areas were flattened onto a white background.
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- To
- File size
About this tool
Each of the common web image formats is good at something different, and converting between them is a routine chore. JPEG is compact for photographs but cannot store transparency and loses a little detail each time it is saved. PNG is lossless and keeps transparency, which makes it right for logos, screenshots and anything with sharp edges, but produces large files for photographs. WebP is usually the best of both, holding transparency while producing noticeably smaller files than either at comparable quality, and it is supported by every current browser. This converter handles the awkward case explicitly: when you convert a transparent PNG or WebP to JPEG, the transparency has nowhere to go, so it is flattened onto a background colour and you are told it happened. Tools that skip that step produce images with unexpected black backgrounds. Everything runs locally in your browser, so nothing is uploaded or stored.
How to use it
- Drop in an image or choose one from your device
- Pick the format you want and adjust quality if it applies
- Download the converted image
Frequently asked questions
Which format should I use on a website?
WebP for almost everything. It produces smaller files than JPEG at matching quality, supports transparency like PNG, and works in every current browser. Keep PNG when you need guaranteed lossless output, and JPEG only when something specifically requires it.
What happens to transparency when I convert to JPEG?
It cannot be kept, because JPEG has no alpha channel. Transparent areas are flattened onto a background colour, white by default, and the tool tells you when that has happened. Converters that do this silently are why images sometimes come back with black backgrounds.
Does converting to PNG improve quality?
No. PNG is lossless, but it can only preserve what is already there. Converting a JPEG to PNG locks in the compression artefacts already present and produces a much larger file. Convert to PNG for transparency or sharp-edged graphics, not to recover detail.
Why is my converted PNG bigger than the original JPEG?
Because PNG is lossless and stores every pixel exactly, while JPEG discards information to save space. For photographs, PNG is routinely several times larger. That is expected, not a fault.
Are my images uploaded?
No. Conversion uses the browser's own image pipeline, so the file never leaves your device. You can verify it by disconnecting from the network after the page has loaded.