Free Image Compressor
Compress JPG, PNG, and WebP images online to reduce file size while keeping useful visual quality. Process up to 20 images at once, compare the results, and download optimized files with no signup.
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How to compress images online
- 1Add your images
Choose JPG, PNG, or WebP files and review their original file sizes. You can add multiple images and compress them together in one batch.
- 2Choose a compression level
Use Light to retain more detail, Recommended for a practical quality-to-size balance, Strong for smaller files, or Custom for direct quality control.
- 3Compare and download
Compress the images, compare their original and optimized file sizes, preview the results, and download individual files or the completed batch.
Compress JPG, PNG and WebP images online
Image compression reduces the amount of data needed to store or transfer an image. Toollix supports JPG, PNG, and WebP input and lets you compress multiple images in one browser-based workflow.
Recommended mode is a practical starting point for everyday web images. Stronger compression can create smaller files but may introduce more visible quality loss, so preview the result before downloading. PNG input is encoded as WebP by this compressor while supported transparency is preserved.
For more control over page weight, you can also resize your image.
Why compress images before publishing?
Large image files can increase page weight and make visitors wait longer, particularly on mobile connections. Reducing unnecessary image bytes can improve loading performance when images are a significant part of the page.
Compression works best alongside sensible image dimensions. Upload images close to their real display size, define width and height where appropriate, lazy-load below-the-fold images, and use useful alt text for images that communicate information.
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Frequently asked questions
What is the best image compression level?
Recommended is a practical starting point for most images. Use Strong when a smaller file matters more, or Light when retaining fine visual detail is the priority.
Can I compress multiple images at once?
Yes. You can add up to the batch limit shown in the tool and process multiple supported images together.
Can I compress PNG images?
Yes. PNG input is converted to WebP during compression, and supported transparency is preserved in the WebP output.
Does image compression reduce quality?
It can. Stronger compression generally produces smaller files at the cost of more image detail. Preview the result and choose the smallest file that still looks appropriate for its intended use.
Can smaller images improve website performance?
Yes. Reducing transferred image bytes can improve loading performance, especially on image-heavy pages and slower connections. Image dimensions and delivery strategy also matter.