Convert PNG to JPG online

To convert PNG to JPG, upload the PNG file, start the conversion and download the result: Converter.now writes a JPEG at quality 90. JPG has no transparency, so transparent areas are filled with white. JPG is a lossy format, so the file is usually much smaller but some fine detail is discarded; keep your PNG original.

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PNG to JPG at a glance

Converts: Portable Network Graphics → JPEG image
Output: A JPEG at quality 90
Compression: PNG: lossless → JPG: lossy
Engine: Pillow (with ImageMagick fallback)
Privacy: Private download link; files are deleted after 6 hours. No account needed.

Transparency flattening and image encoding: How PNG becomes JPG

Decoding PNG exposes a pixel canvas whose alpha then gets composited against an opaque background before JPG encoding. Because that transparency cannot be recovered afterward, edge color has to be judged against the real destination background. PNG decoding combines filtered scanlines with declared color type, bit depth, palette or full alpha, color-profile chunks, and optional ancillary metadata. JPG output is always opaque and lossy, so judge it at high-contrast edges, gradients, fine texture, orientation, and any damage accumulated from repeated encoding.

Canvas decoded from losslessly encoded pixels with full alpha transparency. Image written as lossy JPEG-compressed pixels optimized for photographs and broad compatibility.

Not quite the pair you need? Browse more ways to convert PNG files or the JPG converter hub for every route into and out of JPG.

Background reading: JPG, PNG, WebP and AVIF compared covers how transparency, detail and browser support decide the format.

PNG

Portable Network Graphics

Used for lossless images and transparency.

Family: Images
MIME: image/png

→

JPG

JPEG image

Designed for photos and compact web images.

Family: Images
MIME: image/jpeg

Deciding when PNG to JPG is the right conversion

JPG wins this route whenever its specific mix of compatibility, alpha, animation, and file size fits the destination better than PNG does.

What changes between the PNG model and the JPG deliverable

JPG has no transparency, so transparent areas are filled with white.
JPG is a lossy format, so the file is usually much smaller but some fine detail is discarded; keep your PNG original.
Treat PNG-specific metadata fields as optional in the JPG result until you have actually confirmed they survived.

Reading PNG correctly and satisfying what JPG expects

What can fail when Portable Network Graphics is interpreted

PNG is inefficient for many photographs, and indexed optimization can reduce a smooth palette even without JPEG-style loss.

What JPEG image cannot safely promise

Repeated encoding introduces ringing or blocks, and transparent areas must become opaque.

How the JPG writer handles this route

lossy JPEG-compressed pixels optimized for photographs and broad compatibility is what gets written, labeled as image/jpeg. Whether that actually opens depends on the receiving application, not on the file extension.

How to confirm the converted JPG actually works

Record the PNG evidence before conversion

Inspect transparent edges, gradients, exact dimensions, color, and small text at 100%.

Test the JPG file in its receiving workflow

View text edges, faces, gradients, and high-contrast detail at the intended display size.