Convert JPG, PNG, and WebP images in your browser. Adjust quality and preview file size savings — all processing is local, nothing leaves your device.
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Supports JPG, PNG, WebP, AVIF — max 10MB
Fast, free, and private image format conversion — everything happens in your browser.
WebP offers superior compression — often 25–35% smaller than JPEG at similar quality. Perfect for web performance and modern browsers.
Dial in the exact quality you need with a live preview slider. See file size changes in real time before you download.
Convert to PNG for lossless compression. Ideal for graphics, logos, and images with transparency. PNG encoding preserves every pixel of your converted image.
All conversion happens in your browser using the Canvas API. Your images never leave your device — zero uploads, zero privacy concerns.
See the converted result alongside the original. Compare file sizes and quality before downloading.
No registration, no watermarks, convert as many images as you like — completely free. Up to 10MB per image in JPG, PNG, or WebP.
Three simple steps to convert your image.
Click or drag-and-drop a JPG, PNG, or WebP image — up to 10MB.
Select the target format (WebP, JPG, or PNG) and adjust the quality slider to balance size and clarity.
Click Download to save your converted image. The filename is automatically updated with the new extension.
Everything you need to know about converting image formats with SlimImg.
WebP is ideal for web use — it's smaller than JPG and PNG at similar quality. JPG works best for photos. PNG is best for graphics, logos, or images with transparency.
JPG is a lossy format, so some quality is lost during compression. Use the quality slider to find the right balance. Converting from JPG to WebP at 80% quality usually produces a smaller file with similar visual quality.
Never. All conversion happens 100% in your browser using the Canvas API. Your images never leave your device.
Yes. PNG supports full alpha-channel transparency. If you convert a transparent PNG to JPG, the transparent areas will be filled with white.
The quality slider (0–100%) controls the compression level for JPG and WebP output. Higher values mean better visual quality but larger file size. PNG ignores this setting as it is lossless.
You can convert images up to 10MB in size, and there is no limit on how many images you convert.
Choose PNG as your target format for lossless conversion — PNG preserves every pixel. For JPG, keep the quality slider at 90%+ to minimize visible loss.
Use JPG for photos (smaller files), PNG for images with text or transparency, and WebP for the best compression on web pages. Our converter supports all three.
Step-by-step tutorials to get more from your images.