Convert image formats without uploading anywhere
Different platforms and tools sometimes only accept specific image formats, or you might simply want a smaller file than what your camera or screenshot tool produced by default. This tool converts between the most common formats directly inside your browser — nothing is uploaded to a server at any point, and you can compare the original and converted file size side by side before downloading.
How it works
- Choose an image. Drag one in or tap to select a JPG, PNG, WebP, or BMP file.
- Pick a target format. The preview and file size update instantly as you switch between options.
- Download the result. Save the converted image in its new format.
Choosing the right format
- JPG — smallest file size for photos, but no transparency support.
- PNG — lossless quality and full transparency support, at a larger file size.
- WebP — usually the best size-to-quality ratio, with transparency support, if your platform accepts it.
- BMP — an older, uncompressed format mainly useful for compatibility with specific legacy software.
Pairs well with other image tools
After converting, the site's Image Compressor can shrink the file size further, or the Image Cropper can resize it to an exact dimension.
Your photos stay on your device
Because everything runs locally, this tool never sees, stores, or has access to the images you convert here. See our Privacy Policy for full details on how QuickZeta handles data.
Why the output looks the same but the format is different
After converting, the image should look visually identical (aside from a JPG conversion losing transparency, as noted above) — the file format is really a question of how the image data is stored and compressed, not how it appears. This matters most when a specific website, app, or printing service requires a particular format before it will accept an upload, or when a smaller file size is needed without changing what the image actually looks like.
Frequently asked questions
+Is this image format converter really free, with no sign up?
Yes. There's no account and no limit on how many images you can convert.
+Do you upload my image to a server?
No. The conversion happens directly inside your browser using the Canvas feature built into every modern browser — your image is never sent anywhere.
+Which format should I choose?
Use JPG for photos where a small amount of quality loss won't be noticeable and you want a smaller file. Use PNG when you need transparency or perfectly sharp edges, like a logo or screenshot. Use WebP for the best balance of quality and file size if the platform you're using supports it. BMP is mostly useful for compatibility with older or specialized software.
+What happens to transparency when converting to JPG?
JPG doesn't support transparency at all, so any transparent areas are automatically filled with white during conversion. If you need to keep transparency, convert to PNG or WebP instead.
+Will converting reduce the quality of my image?
Converting to PNG or BMP is lossless, so no quality is lost. Converting to JPG or WebP uses a small amount of compression, similar to the site's own Image Compressor, though usually not enough to be visibly noticeable at the default setting used here.