Optimize and compress PNGs in your browser
A free PNG optimizer with honest quality presets — private and unlimited.
- Free & Unlimited
- No watermark
- Private (runs in your browser)
100% Private – Images never leave your device
Drop an image here
or click to browse
PNG, JPG, WEBP · Max 40MB
Processing happens entirely on your device. Your images are never uploaded, stored or shared — close the tab and they are gone.
Use this png optimizer free tool when a transparent or converted PNG is too heavy for email, CMS uploads or storefronts. Everything runs locally — no image uploads.
When a PNG optimizer helps
PNG is perfect for sharp graphics and transparency, but files can grow quickly. Compressing after you convert to PNG keeps quality usable while cutting weight for faster pages and smoother uploads.
- Email attachments and newsletter assets
- Shopify, WooCommerce and marketplace size caps
- UI icons and stickers that still need clarity
Private by design
FreePNG re-encodes on your device. There is no cloud queue and no watermark on the optimized download.
How to optimize a PNG for free
Add your PNG
Drop a PNG, JPG or WEBP onto the dashed zone.
Pick a preset
Choose Smaller, Balanced or Higher quality — processing stays local.
Download
Save the optimized file instantly with no watermark.
Frequently asked questions
01Is this a png optimizer free tool?
Yes. Compress runs unlimited in your browser with no account and no watermark.
02Is PNG always smaller after compress?
Not always — photos often shrink more as JPG or WEBP. Graphics with flat colours usually stay as PNG.
03Are my images uploaded?
No. FreePNG re-encodes with the browser Canvas API in your tab.
04Will compression remove transparency?
Keep PNG output when you need alpha. Switching to JPG flattens transparency onto a background.
05Should I resize before compressing?
If the image is larger than its display size, resize first — it often saves more than compression alone.
06Can I convert to PNG and then optimize?
Yes. Convert on To PNG, then open Compress for a lighter export.
07Is there a file size limit?
Files up to 40MB are accepted; very large images may also be limited by device memory.