A photo saved as PNG is a format mismatch: PNG's lossless DEFLATE compression can't exploit the smooth gradients in photographic content, so files balloon to five or ten times what JPEG would need for visually identical output. If your PNG is a photo and it's too big to email, upload, or attach, converting it to JPEG is the single most effective fix. This tool does that conversion in your browser with an explicit quality slider, so the size/quality trade-off is yours to make — and the file never leaves your machine.
Drop your file here or click to browse
.png — up to 200 MB. Processed locally; never uploaded.
How to make a PNG File Smaller
Drop the oversized .png onto the converter above.
Check it's really a photo: for screenshots with text, PNG is actually the right format — see the FAQ.
Start at 85% quality; lower it if you need an even smaller file.
Click Convert and compare sizes — photos commonly shrink 5–10×.
Download the .jpg and send it where the PNG wouldn't fit.
Frequently asked questions
Why is my PNG so huge in the first place?
PNG compresses without losing data, using DEFLATE — great for flat graphics, terrible for photos, where near-random pixel noise defeats the compressor. Cameras and screenshot tools that save photos as PNG produce multi-megabyte files JPEG would handle in a few hundred kilobytes.
Is there any reason to keep the big PNG?
Two: if it's a screenshot or graphic with sharp text and flat colors (PNG compresses those well and keeps them crisp), or if it's a master you'll edit repeatedly (JPEG re-saves compound quality loss). Otherwise, JPG is the right call.
What quality setting should I use for email attachments?
85% is the sweet spot — typically 5–10× smaller than the PNG with no visible difference at normal viewing sizes. Drop toward 70% only if you're fighting a hard attachment limit.
Does the image get uploaded to compress it?
No — re-encoding runs in your browser. A 20 MB PNG stays on your disk the whole time, which also makes this much faster than upload-convert-download services.