图像格式转换器

Different tools and platforms insist on different image formats — a CMS wants JPG, a design mockup needs a transparent PNG, a modern web build wants WebP for smaller file sizes, and the occasional legacy app still only accepts BMP. Switching between them normally means opening Photoshop, GIMP, or hunting for a converter site that makes you create an account or wait in an upload queue. This tool skips all of that: pick an image, choose the target format, and get a converted file back in seconds.

The converter handles the four formats people actually run into day to day — JPG, PNG, WebP, and BMP — so you can go from any one of them to any other. Because JPG and BMP don't support transparency, converting a PNG with a transparent background into either format will flatten it onto a solid background, which is standard behavior for lossy or non-alpha formats. WebP output is useful when you're prepping images for a website, since it typically produces noticeably smaller files than JPG or PNG at comparable visual quality.

Everything runs locally in your browser using JavaScript's canvas APIs, so the image file never leaves your device — there's no upload to a server, no account, and no waiting on someone else's bandwidth. That also means it works offline once the page is loaded and there's no practical limit imposed by a server-side queue. It's a good fit for one-off conversions: cleaning up a screenshot for a blog post, turning a PNG icon into a JPG for an email signature, or converting a batch of camera photos to WebP before uploading them somewhere with strict file-size limits.