Compress Images Online – Free Image Compressor (JPG, PNG, WebP, AVIF)

Yes. This image compressor is 100% free with no limits, no watermarks, and no signup required. You can compress and convert as many batches of images as you need, at no cost.

No account or signup is required. Open the page, upload your images, and start compressing immediately. No email address, no registration, no payment information needed.

You can upload and compress up to 20 images per batch. Each image can be up to 20MB in size. There is no limit on how many batches you can run — simply clear the queue and start a new batch when needed.

This tool supports JPG, PNG, WebP, and AVIF formats for both input and output. You can compress images in their original format, or convert them to WebP or AVIF for significantly smaller file sizes without visible quality loss.

AVIF (AV1 Image File Format) is a modern image format developed by the Alliance for Open Media. It offers up to 50% smaller file sizes compared to JPG and around 20% smaller than WebP, while maintaining the same visual quality. AVIF is supported by all major browsers including Chrome, Firefox, Safari, and Edge, making it an excellent choice for web images today and in the years ahead.

Yes. When uploading a JPG image, check the "Convert to WebP" or "Convert to AVIF" option before running the workflow. The tool will compress and convert the image in one step, delivering a smaller file in your chosen format ready to download.

Yes. PNG files can be converted to WebP or AVIF using the same process. Note that PNG supports transparency. Both WebP and AVIF also support transparency, so no information will be lost during conversion.

Smart Compress is the default compression mode. It automatically applies the best balance of file size reduction and visual quality for each image. For JPG and WebP, it targets a quality level of 82%. For AVIF, it applies a quality level of 55 (perceptually equivalent to high quality). For PNG, it uses palette optimization and OxiPNG lossless compression to achieve the smallest possible file without any quality loss.

After running the workflow on your images, a "Bulk Download All (ZIP)" button will appear. Clicking it packages all successfully compressed images into a single ZIP file and downloads it to your device automatically. Individual download buttons are also available for each image if you only need specific files.

Yes. After compression, click any image thumbnail in the queue to open a side-by-side comparison showing the original and the optimized version. The preview also displays the original file size, the compressed file size, and the percentage reduction achieved.

No. All image processing happens entirely in your browser using local computing resources. Your images are never sent to any server, never stored in the cloud, and never seen by anyone else. This is true for every format and every feature, including AVIF encoding and ZIP packaging.

Yes. Because processing is fully local and no data ever leaves your device, this tool is safe to use with confidential, private, or sensitive images. There are no logs, no analytics on your files, and no third-party data sharing.

This tool works in all modern browsers including Chrome, Firefox, Safari, and Edge. AVIF encoding uses a WebAssembly module that loads on demand from CDN the first time you select the AVIF option. A stable internet connection is required for that initial load only.

If the compressed file is larger than or equal to the original, the tool will automatically keep the original file and mark the image as "Already optimized." This can happen when an image has already been compressed previously, or when the original file is already highly optimized. In these cases, try enabling "Convert to WebP" or "Convert to AVIF" to achieve further size reduction.

For photographs and complex images, AVIF offers the best compression at equivalent quality, followed by WebP, then JPG. For images with transparency, use WebP or AVIF instead of PNG for web use. For maximum browser compatibility without worrying about format support, WebP is currently the most reliable modern format choice for web images.