Convert PNG to JPG Without Uploading

Screenshots, design exports, scanned forms, work documents — PNGs collect a lot of personal context. Uploading them to a random web converter sends that context to someone else's server. Even reputable services keep access logs, and many free converters openly state they may train models on uploaded images.

This page never uploads. The PNG to JPG conversion happens inside the same JavaScript engine that runs the rest of the page. Your file is decoded with the browser's canvas, flattened onto a white background (because JPG has no alpha channel), then re-encoded at JPEG quality 0.92 — a sweet spot that keeps the image looking sharp while dropping file size dramatically.

When PNG → JPG is the right move

• Email attachments hitting the 25 MB Gmail limit.
• Sharing screenshots in Slack or WhatsApp without choking the chat.
• Uploading product photos to a marketplace with per-image size caps.
• Speeding up a slow website that ships PNG photographs.
• Sending a portfolio over a hotel Wi-Fi that throttles big files.

When you should keep the PNG

• Anything with transparency that has to stay transparent.
• Logos, icons, UI screenshots with crisp text.
• Source assets you plan to edit again and again.
• Print artwork where every pixel must remain intact.

How much smaller will my file be?

For a typical photographic PNG you can expect a 70–90% size reduction with no visible quality loss at quality 0.92. A 12 MB phone screenshot often lands around 1.5 MB as JPG. Diagrams and pure-text screenshots compress less and may show JPEG artefacts around letters — for those, keeping PNG or switching to WebP is usually better.