PNG to JPG Converter — Shrink Bloated Screenshots and Exports
macOS, Windows, Figma, and Photoshop all default to PNG, which is why a single screenshot can land at 5 MB. Convert PNG to JPG here to drop file size 60–85% — small enough for email, Slack, support tickets, and CMS upload limits — without losing visible quality.
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Supports HEIC, WEBP, AVIF, BMP, TIFF, SVG, GIF, ICO, PDF, JPG, PNG
100% Private — Your files never leave your device
All conversion happens directly in your browser using JavaScript. Nothing is uploaded to any server. Your images stay on your computer the entire time.
What actually changes when PNG becomes JPG
PNG and JPG sit on opposite sides of the same trade-off. Converting in this direction involves three substantive changes:
- Lossless → lossy.PNG's DEFLATE compression reproduces every pixel exactly. JPG's discrete cosine transform groups the image into 8×8 blocks, quantizes them, and discards the high-frequency detail your eye barely registers. That's where the file-size win comes from.
- The alpha channel collapses. JPG only has RGB. Wherever the PNG was transparent or semi-transparent gets composited against a background color — white in this converter — so a logo on a dark page will suddenly grow a white outline.
- Color is subsampled. JPG stores brightness at full resolution but compresses color at half resolution by default (4:2:0 chroma subsampling). For photos this is invisible. For pure-red text on pure-white backgrounds it can produce a faint red bleed around edges.
How much space will I actually save?
Typical results at quality 90, measured against the original PNG:
- 4K monitor screenshot (mostly photos / desktop wallpaper): 80–85% smaller
- App UI screenshot (text + chrome): 60–70% smaller
- Camera-style photograph saved as PNG: 85–92% smaller
- Chart export from Excel or matplotlib: 50–65% smaller
- Flat illustration with few colors: 30–50% smaller (PNG already compressed it well)
The quality slider above controls how aggressively JPG quantizes the high frequencies. Sliding from 92 down to 80 typically halves the file size again with barely visible loss on photos; below that, text starts to look fuzzy.
Who reaches for PNG → JPG
- Anyone emailing screenshots — Outlook's 25 MB and Gmail's 25 MB attachment limits get hit fast by raw PNGs.
- Support engineers attaching bug-report screenshots to Jira, Linear, or Zendesk where the upload limit is small.
- Bloggers and marketers dropping screenshots into WordPress, Ghost, or Medium without slowing the page to a crawl.
- Etsy / eBay / Facebook Marketplace sellers re-exporting product photos that were saved as PNG out of Lightroom.
- Anyone preparing a slide deck — PowerPoint and Keynote files inherit every megabyte of every embedded PNG, and large decks exceed mailbox limits surprisingly quickly.
When to keep the PNG instead
- The image has transparency you actually use.
- It's a logo, icon, or any flat-color graphic with sharp edges.
- You'll keep editing it — every JPG re-save degrades a little more.
- It's line art, a diagram, or a pixel-perfect mock-up.
- You're archiving the original master and storage isn't tight.
For the deeper compression / transparency / use-case comparison, see PNG vs JPG: Which Is Better?
Frequently asked questions
Why are my screenshots saved as PNG by default?
Both macOS and Windows save screenshots as PNG because PNG is lossless and screenshots are full of sharp text and crisp UI lines that JPG handles badly. The downside is size: a 4K-monitor screenshot routinely hits 3–8 MB as PNG, which is awkward for email attachments, Slack uploads, or pasting into a ticket. Converting to JPG at quality 85–92 shrinks it 70–80% and is visually identical for almost everything except very small text.
Will converting PNG to JPG keep transparency?
No — JPG has no alpha channel. Anywhere the PNG was transparent gets filled with a solid color when the image is re-encoded (this converter uses white). If your PNG has any partial transparency around the edges, those soft edges will pick up a faint white halo. For logos, product cutouts, and watermarks, stay in PNG or convert to WebP instead.
What quality setting should I pick?
For photographs, 85–92 is the sweet spot — quality 92 is essentially indistinguishable from the original at viewing size and roughly 4–6× smaller than the PNG. For screenshots, lean toward the upper end (90–95) because JPG's compression smudges around the high-contrast edges of text and UI chrome. Below 80, fonts start to look fuzzy.
Does JPG degrade every time I save it?
Yes. Every time you open a JPG, edit it, and save again, the entire image goes back through the discrete cosine transform and loses a little more detail (so-called generation loss). If you're going to keep editing the image, keep the PNG master and only export to JPG as the final delivery step.