Keep transparent areas
The output remains a PNG, so transparent backgrounds used by logos, overlays, and interface assets are preserved.
Private static PNG compression
Free PNG Compressor
Make static PNG graphics easier to publish and share. Your files are processed in the browser, stay in PNG format, and remain on your device throughout the process.
Compress your images
Approximate output quality
Smaller fileBetter quality
Advanced resize settings
Your images stay on your device. Compression happens in your browser.
PNG transparency is retained. Animated PNG files are not supported, and an already optimized PNG may not become noticeably smaller.
For transparency and crisp graphics
When should you compress a PNG?
PNG is useful for interface graphics, diagrams, and images that need transparency. Those strengths can also produce large files, especially at oversized dimensions.
Reduce oversized exports
Optional dimension limits can make a large design export match the size at which it will actually be displayed.
Process batches locally
Compress multiple static PNG files in one session, then download them separately or collect finished results in a ZIP.
A PNG-aware workflow
How to compress a PNG online
PNG behaves differently from JPG. Browser encoders may find savings through a fresh encode, metadata removal, or smaller dimensions, but results depend heavily on the image content and its previous optimization.
- 01
Select static PNG files
Add screenshots, diagrams, logos, or other still PNG images. Animated PNG files are rejected so frames are never silently discarded.
- 02
Decide whether to resize
If a graphic is exported at twice the dimensions you need, set a maximum width or height. Leave resizing off when original dimensions matter.
- 03
Check size and transparency
Compare the size result and inspect the downloaded file in its intended layout, especially when edges or transparency are important.
Useful PNG starting points
Logos and UI assets
Keep dimensions intentional
Use the exact display size or an appropriate high-density variant instead of shipping an unnecessarily large canvas.
Screenshots
Check text after export
Fine interface text and one-pixel lines deserve a quick visual check at the size where users will see them.
Photo-like PNGs
Consider the format choice
A photo stored as PNG can stay large. JPG or WebP may suit photographic content better, but this tool does not convert formats.
Where optimized PNGs help
Static PNG compression works best for graphics whose transparency, sharp edges, or exact format are more important than achieving the smallest possible photo file.
Transparent logos
Prepare brand marks and overlays for web use while retaining their alpha channel.
Product screenshots
Reduce oversized interface captures before adding them to documentation, launch pages, or support articles.
Diagrams and graphics
Make charts, wireframes, and simple illustrations lighter when PNG remains the right output format.
Frequently asked questions
What to expect when compressing static PNG images in a browser.
Will the compressed PNG keep transparency?
Yes. ImageCompressly keeps the image in PNG format, including transparent areas supported by the source image.
Why is PNG compression sometimes small?
PNG files may already be efficiently encoded. Content with many colors or photo-like detail is also harder to make small while retaining the PNG format.
Can I compress an animated PNG?
No. Animated PNG files are rejected in this version because browser-based still-image encoding would otherwise remove the animation frames.
Does the quality slider work like it does for JPG?
Not always. PNG encoding support varies by browser, and dimensions or the original optimization can have a larger effect. Always judge the actual size and visual result shown by the tool.