Compress PNG images online
Reduce PNG file size while keeping transparency intact. Fast, free, and private — your images are processed directly in your browser, up to 30 at a time.
Drop your PNG images here
or choose up to 30 PNG images from your device
Maximum file size: 20MB per image
Your images stay private
Images are processed directly in your browser and are never uploaded to our servers. Transparency is preserved.
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How to compress a PNG image
- 1
Upload your PNG images
Drag up to 30 files in or choose them from your device.
- 2
Choose your compression level
Drag the slider to balance file size and color detail.
- 3
Review each result
Check the size saved for every image in the table.
- 4
Download one or all
Save a single file, or download everything as one ZIP.
Why compress PNG images?
- Faster website loading, since smaller PNGs mean fewer bytes to send
- Smaller file sizes that are easier to store and back up
- Transparency stays intact, unlike converting to JPG
- Easier to share screenshots, logos, and graphics by email
- Faster uploads to content management systems and design tools
- More storage space saved across your devices and cloud accounts
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Frequently asked questions
- Yes. Compressing PNG images with FreeImagesTools is completely free, with no signup, watermark, or usage limit.
- No. Your images are processed directly in your browser using the Canvas API. They never leave your device, so there's nothing to upload or store.
- No. Transparent areas of your PNG stay transparent. Compression only adjusts the color detail in the visible parts of the image.
- PNG is a lossless format, so there's no built-in quality setting the way JPG has one. This tool reduces the number of distinct colors used in the image before re-saving it as PNG, which shrinks the file while keeping edges and transparency sharp. Lower quality settings mean fewer colors and a smaller file.
- Yes. You can upload up to 30 PNG images at a time, compress them all with one quality setting, and download them individually or together as a ZIP file.
- Yes. The tool works in any modern mobile browser on iPhone and Android, with no app to install.