What does this tool do?
Image Format Converter changes pictures between PNG, JPG and WebP in the browser, with a quality control and an output-size readout so you download the file in exactly the format you want. It handles jobs like turning a PNG into a smaller WebP or a JPG into a PNG for transparency in seconds. Your image is never uploaded — every conversion happens on canvas on your device.
How to use it
- Adjust the values and options.
- See the result in the live preview.
- Copy the generated CSS/code into your project.
What it solves
Where one format is strong another is weak, and this tool lets you convert back and forth to fit the need. For the web you can turn heavy PNG photos into WebP to speed up your pages; when you need a transparent background you convert a JPG to PNG. The quality slider keeps the size/quality trade-off in your hands for JPG and WebP output.
Common use cases
Shrinking blog and store images to WebP, preparing logos and icons as PNG with transparency, migrating an old JPG archive to modern WebP and matching whatever format an app will accept. Seeing the output size after each conversion confirms you picked the right format.
Frequently asked questions
When should I use PNG vs JPG vs WebP?
JPG gives small files for busy photos but has no transparency; PNG is ideal for sharp-edged graphics, logos and transparency but is larger. WebP offers the best of both — smaller than JPG for photos, transparency for graphics, and usually the most efficient overall.
Does converting to JPG lose transparency?
Yes. The JPG format has no alpha channel, so transparent areas are filled with white (or your chosen background) during conversion. If you need to keep transparency, convert to PNG or WebP instead.
Is Image Format Converter free?
Yes. Image Format Converter and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Image Format Converter works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.