Compress AVIF, HEIF, WebP, JPG, and PNG images in your browser. Reduce file size, resize dimensions, and preview the result before downloading.
Output Format
A faster visual pipeline
Compress one image or a complete batch in your browser. Choose an output format, adjust the quality, resize the dimensions, and download the finished files. Processing happens on your device, so the images never need to be uploaded to a server.
Supported formats include JPG, PNG, WebP, AVIF, GIF, SVG, HEIF, and JPEG XL (JXL). Use the preview to find a file size and visual quality that works for your website, ecommerce store, social post, or application.
Large images can add a lot of time to a page load. Compressing them before upload reduces bandwidth use, and modern formats such as WebP and AVIF often produce smaller files than older formats at a similar visual quality.
Everything runs in the browser, so you do not need to install editing software for a quick conversion. Batch processing also avoids repeating the same settings for every file in a large image library.
SpeedVitals compresses images in your browser with WebAssembly. Your files stay on your device and are never uploaded to our servers.
The tool supports multiple image formats, including AVIF, JPEG, JPEG XL (JXL), PNG, HEIF, SVG, GIF and WebP. This allows you to choose the format that best suits your needs.
Yes. Drag and drop several images to process them as a batch. Compression uses your device memory and CPU, so a very large batch can slow down or crash the browser.
Compression can affect image quality. Adjust the quality setting for the selected format, then open the preview and use the comparison slider to check the result before downloading.
Adjust the quality slider for each format to choose the file size and visual quality you need.
The preview places the original and compressed images side by side for a direct comparison.
Image compression uses your device CPU and memory. Very large files or batches can make the browser unresponsive, especially on devices with limited resources. Try a smaller batch or reduce the dimensions of unusually large images first.
The tool does not set a fixed file or batch limit. Your practical limit depends on the memory and processing power available on your device. If the browser becomes slow, reduce the number or size of the images in the batch.
You need an internet connection to open the tool. Some format modules load only when you first use that output format. To continue offline, compress one image in each format you plan to use before disconnecting, then process the remaining files locally.
From the SpeedVitals blog
