Image Converter
Convert images between JPG, PNG, and WebP — with adjustable quality — entirely in your browser. PNG→JPG, JPG→WebP, and more.
Image Converter
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Convert Between JPG, PNG, and WebP
Different jobs want different image formats: JPG for small photos, PNG for sharp graphics and transparency, WebP for the best size-to-quality ratio on the modern web. This tool converts any image to the format you need — PNG to JPG, JPG to WebP, and every other combination — with a quality slider for the lossy formats.
Conversion runs on a canvas in your browser. Everything runs on your device via open-source browser libraries — your file is never uploaded. You can verify it yourself.
Frequently Asked Questions
JPG for photographs, PNG when you need crisp edges or transparency, and WebP when you want the smallest file at good quality (great for websites).
For JPG and WebP it trades file size against fidelity — lower means smaller. PNG is lossless, so the slider does not affect it.
Converting a transparent PNG to JPG fills the background white (JPG has no transparency). Convert to WebP or keep PNG to preserve transparency.
No — the conversion happens entirely in your browser and the image is never sent anywhere.
Choose the format from the job, not the filename
A conversion changes how pixels are stored; it cannot restore detail that was already discarded. Keep the original until you have checked the new file at 100% zoom.
Photographs → JPG or WebP
For camera images, start around 82–88 quality. JPG is the safest choice for older software and print shops. WebP is usually smaller for websites, but confirm the receiving system accepts it. Repeatedly converting JPG to JPG compounds compression artifacts, especially around text and high-contrast edges.
Logos and screenshots → PNG
PNG preserves exact edges and transparency, which makes it better for interface captures, diagrams and logos. It may be much larger than JPG for a detailed photograph. When converting transparency to JPG, QuickMerge places the image on an opaque background because JPG has no alpha channel.
Check before deleting
Compare dimensions, transparency, colour appearance and file size after conversion. Browser colour management can differ from professional prepress software, and uncommon embedded profiles may not survive a canvas export. Use a dedicated imaging application for archival or print-critical colour workflows.
Maintained by QuickMerge · Practical guidance reviewed 11 July 2026 · How we review tools