Compress a PNG File
Re-compress a PNG and optionally reduce its color map to save bytes. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Compress a PNG File
- 1. Drop in your PNG. Add the file you want to shrink, ideally one that has not already been through a similar optimization pass.
- 2. Set Reduce to N colors. Enter a target color count like 64 or 128 to quantize the palette and cut size further, or leave it at 0 to keep the full color range and only re-compress.
- 3. Download the compressed PNG. The tool re-encodes the file with tighter compression and, if you set a color count, reduces the palette before saving the result.
When to use Compress a PNG File
Compress a PNG File re-encodes an image with better compression and, optionally, a reduced color palette to save bytes. Reach for it whenever a PNG is larger than it needs to be for its actual use, whether that is a page asset or an email attachment.
- Shrinking a logo for the web. A logo exported straight from a design tool carries more colors and less compression than it needs for a header image, and re-encoding it cuts the file size noticeably.
- Reducing bandwidth for a documentation site. A docs site embeds many screenshot PNGs, and quantizing each one to a smaller palette before publishing keeps page load times down without hurting readability.
- Preparing an asset bundle. A mobile app bundles PNG icons and needs every asset as small as possible to reduce install size, so running each through compression with a modest color count helps.
Examples
Squeeze a logo
Input
logo.png + 64 colors
Output
logo.png quantized to 64 colors and re-encoded
About the Compress a PNG File tool
Compress a PNG File is a free online tool that works entirely inside your web browser. Re-compress a PNG and optionally reduce its color map to save bytes. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 108 PNG utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Reduce to N colors (0 = keep all) setting, and the result refreshes the moment you change it. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Compress a PNG File cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
Which files does Compress a PNG File accept?
It accepts PNG images. There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.