PNG Optimizer
Optimize PNG images to a smaller size while preserving the alpha channel and sharpness. Runs locally in your browser.
How it works
- 1
Add your images
Drag and drop, paste, or browse. Nothing is uploaded — files are read directly in your browser.
- 2
Choose your options
Set the options for PNG Optimizer and preview the result before you export.
- 3
Process on your device
PNG Optimizer runs locally on a Canvas, so even large batches are handled quickly and privately.
- 4
Download
Save a single file, or grab everything at once as a ZIP.
Common uses
- Shrink UI screenshots and logos while keeping transparency crisp.
- Cut PNG weight on a landing page to improve load time.
- Optionally downscale oversized PNG exports to a sensible max width.
About the PNG Optimizer
Optimize PNG images to a smaller size while preserving the alpha channel and sharpness. Runs locally in your browser.
PNG Optimizer is part of a free, privacy-first toolkit. Everything is processed locally on a Canvas with high-quality pica resampling — there are no uploads, no quality loss from a server round-trip, and no limits.
Because png optimizer works without any sign-up or installation, you can use it as often as you like and it's always available — on desktop or mobile, and even offline.
Explore more image tools, or try Image Resizer · Batch Image Resizer.
Related tools
Related guides
PNG Optimizer — FAQ
It re-encodes the PNG and can optionally downscale to a maximum width, which is the biggest lever for size. Photographic images often shrink far more as JPG or WebP.