Compress PNG
Shrink large PNG files — screenshots, logos and graphics — with control over resolution and format. Runs locally in your browser, with nothing uploaded.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to compress
- 1
Add your PNG images
Drag and drop your PNG images onto the tool, or click to browse. Everything stays on your device.
- 2
Set the compression
Choose a quality level, a maximum resolution, or a target file size in megabytes — for all images at once or per image. The estimated size updates live.
- 3
Download the result
Save a single image directly, or get them all as a .zip. Free, instant, and never watermarked.
Why use Compress PNG?
Real compression control
Most compressors give you a single slider. Here you control quality, maximum resolution, output format and even a target file size — globally or per image.
See the savings first
The estimated output size updates per image and in total as you change settings, so you find the sweet spot before you download.
100% private
Compression runs locally in your browser. Your images are never uploaded, stored or seen by anyone.
Works on any device
No install and no account. It runs in any modern browser on Windows, macOS, Linux, Android or iPhone.
Why PNGs get large — and how to shrink them
PNG is lossless, so it keeps every pixel exactly, which makes full-size PNGs heavy. The most effective ways to shrink one are to reduce its resolution (a smaller image needs far less data) and, for photographic PNGs, to convert to JPEG — which is dramatically smaller at the same visible quality. LocalTools lets you do either and previews the result.
Keep PNG or switch to JPEG?
For screenshots, logos and anything with sharp text or transparency, keep PNG and just reduce the resolution if you can. For photographs saved as PNG, switching the output format to JPEG usually gives the biggest size win with no visible loss. The format selector lets you choose.
Frequently asked questions
How do I make a PNG much smaller?
Reduce the maximum resolution, and for photographic PNGs switch the output format to JPEG. For screenshots and logos, lowering the resolution alone usually does the job while keeping them sharp.
Are my images uploaded to a server?
No. Decoding, any editing, and the conversion all run entirely in your browser. Your files never leave your device, so it even works offline once the page has loaded.
Can I convert several images at once?
Yes. Add as many as you like — a single image downloads directly, and multiple images are bundled into one .zip so you get everything in a single click.