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Supports PNG, JPEG, WebP, GIF, BMP
Image Converter
ImageConvert images between PNG, JPEG, and WebP. Resize, adjust quality, and download. All processing happens in your browser.
Choosing the right image format
Each image format has distinct strengths. PNG supports transparency and lossless compression, making it ideal for logos, icons, and screenshots. JPEG uses lossy compression to achieve small file sizes for photographs and complex images. WebP is a modern format from Google that combines the best of both — lossy and lossless compression, transparency support, and 25-35% smaller file sizes compared to JPEG at equivalent quality. Choosing the right format directly impacts page load speed and user experience.
Image optimization for web performance
Images are typically the largest assets on a web page, accounting for 50% or more of total page weight. Optimizing images by choosing the right format, reducing dimensions to match display size, and adjusting compression quality can dramatically improve load times. Modern build tools like Next.js Image, Astro Image, and sharp can automate this process, but having a quick converter for one-off tasks saves time during development.
WebP and modern image formats
WebP is supported by all major browsers and offers significant file size savings over PNG and JPEG. For new projects, consider using WebP as your primary format with PNG or JPEG fallbacks for older browsers. The AVIF format offers even better compression but has more limited browser support. This converter handles PNG, JPEG, and WebP conversions entirely in your browser using the Canvas API, with no uploads to any server.
Frequently Asked Questions
Is my image data sent to a server?
No. All image processing happens entirely in your browser using the HTML Canvas API. Your images never leave your device. This makes the tool safe for sensitive or proprietary images.
Why should I use WebP over JPEG?
WebP produces 25-35% smaller files than JPEG at equivalent visual quality. It also supports transparency (like PNG) and animation (like GIF). All modern browsers support WebP, making it the best general-purpose format for web images.
Can I resize images with this tool?
Yes. Enter custom width and height values before converting. With "Lock aspect ratio" enabled, changing one dimension automatically adjusts the other to maintain proportions. This prevents stretched or distorted images.
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