Convert PNG to JPG
Converting a photographic PNG to JPEG cuts the file dramatically, and JPEG opens in literally everything — which is usually why people want this rather than a more modern format. The one thing to know going in: JPEG has no transparency, so any alpha in the PNG has to go somewhere.
Best for: Photographic PNGs that need to work in old software, print pipelines, or upload forms that only accept JPEG.
What to know
- Transparent areas are flattened onto white. There is no way around this — JPEG has no alpha channel at all.
- Encoding uses MozJPEG with trellis quantisation, which produces files around 10% smaller than a standard JPEG encoder at the same quality.
- If the PNG is a screenshot, logo or contains text, JPEG is a poor choice — its block transform makes hard edges look muddy. Use WebP instead.
About PNG
A lossless format built for graphics, screenshots and anything needing a real alpha channel.
- Lossless compression on a photograph produces enormous files — often 5-10x a JPEG of the same shot.
- Its DEFLATE compression predates every modern entropy coder.
- Truecolour PNGs waste space on images that only contain a few hundred distinct colours.
- Support:
- Every browser ever shipped.
- Transparency:
- Full 8-bit alpha.
About JPEG
The 1992 workhorse of digital photography, and still what almost every camera and phone writes by default.
- Universally supported by anything that can display an image at all.
- Extremely fast to decode, with hardware paths on most devices.
- Safe for print workflows and old software that rejects newer formats.
- Support:
- Every browser ever shipped.
- Transparency:
- None.
Frequently asked questions
- What happens to transparency when converting PNG to JPG?
- It is flattened onto a white background. JPEG has no alpha channel, so transparent and semi-transparent pixels must be composited against something. If you need transparency, convert to WebP or AVIF instead.
- Why does my text look blurry after converting PNG to JPG?
- JPEG compresses in 8x8 blocks using a frequency transform, which handles smooth photographic gradients well and sharp high-contrast edges badly. Text and line art are the worst case. For images containing text, use lossless WebP or an optimised PNG.
- Is this converter better than a standard JPEG export?
- Usually, yes. It uses MozJPEG with trellis quantisation and progressive encoding, which typically produces files around 10% smaller than a conventional encoder at identical visual quality.
Related conversions
Converting from something else? Convert any image to JPEG