PNG to JPG Converter
Convert PNG to JPG in your browser to cut file size, with control over quality and what happens to transparency.
Last reviewed by the Radiatus Cloud team
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Transparency has to go somewhere
JPEG has no alpha channel, so every transparent pixel must be filled with something. Most converters silently use black, which produces the classic ruined logo on a dark rectangle. Choosing white matches most page backgrounds; choosing the actual background colour of where the image will sit is better still. Decide before converting rather than discovering it afterwards.
The size win is real
For a photograph, JPEG is typically five to fifteen times smaller than the equivalent PNG at visually identical quality. PNG stores every pixel exactly, which is wasted precision on photographic content where the eye cannot detect the difference. This is the main reason to convert.
The conversion is one-way
JPEG is lossy, so the moment you convert, information is discarded permanently. Converting back to PNG restores the file format and none of the data. Keep the PNG if the image is a working master you will edit again.
Quality setting
Around 80 is the sweet spot for photographs: visually indistinguishable from 100 at a fraction of the size. Above 90 the file grows steeply for no visible gain.
Do not convert screenshots or logos
JPEG compresses by discarding high-frequency detail, which is exactly what sharp edges and text are made of. A screenshot converted to JPEG develops visible fringing around every letter and looks dirty. Keep those as PNG, or use WebP, which handles both content types well.
Consider WebP instead
WebP is typically 25 to 35 percent smaller than JPEG at equivalent quality, supports transparency so the flattening problem disappears entirely, and is supported in every current browser.
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Frequently Asked Questions
What happens to transparent areas?
They must be filled, because JPEG has no alpha channel. Many converters default to black, which ruins logos. Choose white or the actual background colour the image will sit on.
How much smaller will the JPG be?
For a photograph, typically five to fifteen times smaller at visually identical quality, because PNG stores every pixel exactly and that precision is wasted on photographic content.
Can I convert back to PNG later?
You can change the format back, but not recover the data. JPEG discards information permanently at conversion. Keep the PNG if the image is a master you will edit again.
Should I convert screenshots to JPG?
No. JPEG discards high-frequency detail, which is what sharp edges and text are made of, so screenshots develop visible fringing around letters. Keep them as PNG or use WebP.
Is WebP a better choice?
Usually. It is typically 25 to 35 percent smaller than JPEG at the same quality, supports transparency so nothing needs flattening, and works in every current browser.
Privacy & Security
Conversion handled locally.
About This Tool
This tool runs entirely in your browser. No data is sent to any server, ensuring complete privacy. Simply use the interface above to get started — no registration or login required.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
EXIF Viewer
ImageExtract hidden EXIF data (Camera, GPS, Settings) from images.
Favicon Generator
ImageGenerate favicons and app icons at every required size from one source image, with the exact HTML to reference them.
Placeholder Image Generator
ImageGenerate placeholder images at any size with custom colours and label text. Produced in your browser as downloadable files, no external hotlinking.