Compress PNG
Compress PNG files in your browser. Strip metadata, re-encode, and optionally reduce the colour palette — transparency is preserved and we never ship a 'compressed' file larger than your original.
Files never leave your device — 100% browser-based.
When to use this tool
- Your PNG logos, screenshots or UI exports are slowing down a website.
- You need to send a design mockup by email without zipping it.
- You want to keep PNG's transparency but shrink the file.
- You need a compress PNG online tool that runs in your browser with no upload.
Best for
- Logos and icons
- UI screenshots
- Game and app assets
- Design mockups
- Diagrams and charts
Every image you drop here is processed entirely inside your browser using the standard Canvas and File APIs. Nothing is uploaded, stored or logged on a server — you can disconnect from the internet after the page loads and the tool still works.
Quality & file size notes
- • PNG compression is lossless — pixels are preserved exactly. Savings come from re-encoding, removing metadata and optionally reducing the colour palette.
- • For PNGs that actually contain photographs, converting to JPG or WebP usually saves 70–90% with no visible quality loss.
- • Use PNG for logos, screenshots, graphics and transparency. Use JPG for photos with no transparency. Use WebP when the platform supports it — it can keep transparency and is usually smaller.
Things to watch out for
- — PNG compression cannot shrink a photo as aggressively as JPG. If your PNG is a photo, switching format is the bigger win.
- — Palette / indexed-colour reduction can introduce visible banding in gradients. Compare results at 100% zoom.
How to compress a PNG image
- Open Compress PNG — it loads instantly and runs fully in your browser.
- Drop your PNG files onto the page (one or many).
- Leave the default lossless mode for icons and screenshots, or open Advanced and reduce the palette for flat graphics.
- Preview at 100% zoom to confirm transparency and edges still look clean.
- Download the compressed PNG or grab the whole batch as a ZIP.
What if my PNG is still too large?
If PNG compression alone isn't enough, work down this list:
- Reduce the dimensions — a 4000 px PNG is overkill for most uses. Try Reduce Image Size.
- Convert PNG to WebP — keeps transparency and is typically 25–50% smaller.
- If there's no transparency, convert PNG to JPG — usually 70–90% smaller.
- Remove embedded metadata and colour profiles — see Remove Image Metadata.
- Avoid using PNG for large photographs. PNG is for logos, screenshots, graphics and transparency.
Compress PNG: option comparison
Different routes to a smaller PNG — pick the one that matches your situation:
| Option | Best for | Keeps transparency? | Quality impact | File size impact | Tool |
|---|---|---|---|---|---|
| Any PNG, batch use | Yes | Lossless by default | 20–60% smaller | Compress PNG | |
| Logos, screenshots, transparent UI | Yes | Lossless by default | 20–60% smaller (up to 80% with palette) | PNG Compressor | |
| Oversized screenshots and graphics | Yes (PNG → PNG) | Sharp at chosen width | Linear with pixel count | Reduce Image Size | |
| Web pages, modern browsers | Yes | Visually identical at quality 85+ | 25–50% smaller than PNG | PNG to WebP | |
| Photos saved as PNG (no transparency) | No — flattens background | Invisible at quality 80–85 | 70–90% smaller | PNG to JPG |
Not sure which format to choose?
Compare JPG, PNG, WEBP, AVIF, HEIC, GIF, SVG, BMP, TIFF and PDF side-by-side with use cases and trade-offs.
Read the image format guide →More questions about this tool
How do I compress a PNG file?+
Open Compress PNG, drop your file, and download the result. Default mode is fully lossless. For flat graphics you can reduce the palette to 128 or 64 colours for bigger savings with no visible change.
Can I compress PNG without uploading?+
Yes. Every step runs in your browser using Canvas and File APIs — your PNG never touches a server.
Will PNG compression keep transparency?+
Yes. PNG → PNG preserves the alpha channel exactly. Transparency is only lost if you convert to JPG. PNG → WebP keeps transparency and is usually smaller still.
Why are PNG files so large?+
PNG is lossless — it stores every pixel exactly with no quality compromise. Perfect for logos and screenshots, the wrong format for photos.
Should I use PNG, JPG or WebP?+
PNG for logos, icons, screenshots and transparency. JPG for photos with no transparency. WebP when the platform supports it — keeps transparency and is usually smallest.
Is JPG smaller than compressed PNG?+
For photos: almost always yes, often dramatically. For logos and flat graphics with transparency: PNG (or WebP) is the right choice.
Why is my PNG still large after compression?+
Either the PNG is actually a photograph (convert to WebP or JPG), or it was already well-optimised — we return the original rather than ship a bigger file.
Why use this tool?
Built for speed, privacy and simplicity. No accounts, no installs, no watermarks.
Reduce PNG file size while preserving transparency
Strip EXIF and embedded colour profiles on re-encode
Batch-process hundreds of PNG images at once
How it works
Three simple steps. Everything happens in your browser.
Drop your images into the box above
Choose a target file size or move the quality slider
Click Compress and download the smaller files
Related compression tools
Keep going — pair this with another quick tool.
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Frequently asked questions
Quick answers about how this tool works.
Are my images uploaded anywhere?
No. All compression happens locally in your browser using the Canvas API. Your files never leave your device.
Is the compressor free?
Yes — fully free, unlimited, no account, no watermarks.
Will my image lose quality?
JPG, WEBP and AVIF use lossy compression, so some quality is traded for smaller files. Use the quality slider to find the sweet spot. PNG is lossless — most savings come from re-encoding and stripping metadata.
How small can I make my images?
Pick a target file size (in KB) and we'll auto-tune quality to get as close as possible while preserving the best look.
Is EXIF metadata removed?
Yes — re-encoding strips EXIF, GPS coordinates and camera tags, which also reduces file size.
Does it work on mobile?
Yes. The compressor is fully responsive and runs on any modern phone, tablet or desktop browser.