Compress PNG images without uploading them
PNG stays PNG. A 256-colour palette makes screenshots, logos and graphics 60 to 80 percent smaller with no visible change, and transparency survives. Switch to WebP or JPG for photos.
PNG has no quality dial, so a plain re-save changes nothing. What works is the trick TinyPNG made famous: reduce the image to a palette of up to 256 carefully chosen colours and let PNG store the smaller index instead of full colour. This page preselects that, keeps transparency, and shows the result in the preview so you can zoom in and check the edges. Photos with wide smooth gradients can show faint banding; pick WebP for those, which keeps transparency too, or lossless PNG to keep every colour.
How to compress PNG images without uploading them
- Drop your PNGs. Screenshots, graphics, exports from design tools.
- Check the preview. The palette version is preselected. Zoom in on text and edges; switch to lossless or WebP if anything looks off.
- Download. Each row shows the saving.
Why use myownpic for this
Nothing is uploaded
Photos are read from your disk and processed by your browser. There is no server, so ID scans, family pictures and work files never travel anywhere.
Faster than any upload
A 10 MB photo compresses in about a second. No queue, no upload bar, no download round trip, and it keeps working offline.
Whole batches, one zip
Drop a folder, not a file. Every tool works on many images at once and hands you a zip.
No watermark, no account
Free with no sign-up, no daily quota, no resolution cap and no logo stamped on your pictures.
Questions people ask
How can a PNG get smaller without changing format?
By storing a palette. Most screenshots and graphics use far fewer distinct colours than a photo, and the remaining ones are merged into their closest neighbours. The file stays a normal PNG that opens everywhere.
Will transparency survive?
Yes, in the palette PNG and in WebP. JPG has no transparency, so transparent areas become white.
What about text and logos?
They stay crisp: a palette changes colours, not edges. JPG can add faint halos around sharp edges, so prefer PNG or WebP for graphics.