PNG files are great for graphics and transparency, but they're far too large for sharing photos by email, uploading to social media, or using on the web. Converting PNG to JPG can reduce file sizes by 60-80% while keeping photos looking great — making them easier to share, upload, and store.
| File type | PNG | JPG | Note |
|---|---|---|---|
| Mac screenshot (2560×1440) | 4.8 MB | 680 KB | 86% smaller |
| Photo exported as PNG | 8.2 MB | 1.1 MB | 87% smaller |
| UI design export (1920×1080) | 2.8 MB | 520 KB | 81% smaller |
| Chart/diagram (1200×800) | 1.5 MB | 280 KB | 81% smaller |
Mac screenshots are saved as PNG and can be 3-8MB each. Convert to JPG before sharing to keep file sizes under 1MB — faster uploads and no attachment limits.
Some photo editors export as PNG by default. Social platforms re-compress uploads anyway, so converting to JPG first gives you control over quality and faster uploads.
A folder of PNG photos can take 5-10x more space than JPG. Batch convert to JPG to reclaim storage on your Mac, NAS, or Google Drive.
If your CMS or platform doesn't support WebP yet, JPG is the best alternative for photos. Convert design exports from PNG to JPG for faster-loading pages.
Download and open Picmal on your Mac.
Drag and drop your PNG files or entire folders into Picmal.
Choose JPG as the output format and click Convert.
Portable Network Graphics
Lossless image format standardized as ISO/IEC 15948 and maintained as a W3C Recommendation. PNG supports full alpha transparency and is the preferred format for graphics, screenshots, and images requiring sharp edges.
Best for
Screenshots, logos, graphics with transparency
Joint Photographic Experts Group
The most widely supported image format, standardized as ITU-T T.81 in 1992. JPG (also called JPEG) is compatible with virtually every device and application, and remains the universal default for photographic content.
Best for
Sharing photos, web uploads, and email attachments
Something not covered here? Write to support@picmal.app
Open Picmal, drag your PNG files or folders into the window, select JPG as the output format, adjust quality if needed, and click Convert. Picmal handles everything locally.
JPG uses lossy compression, so there is some quality reduction. At 90-95% quality, the difference is invisible for photos. For graphics with sharp text, you may notice slight softening of edges.
PNG to JPG typically reduces file sizes by 60-80%. A 5MB PNG screenshot becomes 800KB-1.2MB as JPG at 90% quality. Photos compress even better than screenshots.
Yes — JPG doesn't support transparency. Transparent areas become white (or the background color). If you need transparency, convert to WebP instead, which supports both transparency and small file sizes.
Yes. Drag entire folders of PNG files into Picmal and convert them all to JPG at once with the same quality settings.
Picmal is a one-time purchase of $15.99 — no subscription. Download to explore the interface. 14-day money-back guarantee included.
If you don't need to change formats, Picmal can also compress your files to reduce size:
Want step-by-step instructions with multiple methods including Preview, Terminal, and online tools?
Read: How to Convert PNG to JPEG on Mac →One-time purchase · No subscription · 14-day money-back guarantee