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Convert PNG images to JPG to cut file size dramatically. Choose the background colour that replaces transparency, and set the JPG quality.
Last updated 5 September 2026
Drag & drop files here, or
Up to 100 files, 25 MB each
Select one or more .png images.
Pick the colour that fills transparent areas (white by default) and choose a JPG quality level.
Save the JPGs individually or as a ZIP.
The canvas is filled with white, the PNG is drawn on top so transparent areas show white, and the result is exported as JPEG at quality 90 — roughly a tenth of the PNG size.
JPG has no transparency channel. When a transparent PNG becomes a JPG, every see-through pixel has to be given a solid colour. This tool fills them with a background colour you choose — white works for most documents, but you can match a page or brand colour.
If preserving transparency matters, convert to WebP instead — it keeps the alpha channel and is still much smaller than PNG.
Screenshots, scanned documents and photos saved as PNG are the classic case — PNG stores every pixel losslessly, which is great for sharp lines and text but wasteful for photographic detail with millions of subtly different colours. Converting those to JPG typically shrinks the file dramatically with no visible loss at a sensible quality setting.
Keep the source as PNG (or convert to WebP instead) if the image has fine text you plan to zoom into closely, or transparency you still need after conversion — both are things a JPG cannot represent.
That is expected — JPG cannot be transparent, so transparency was replaced with the background colour you selected. Use WebP if you need to keep transparency.
For photos and detailed graphics, typically 70–95% smaller. For simple flat-colour logos the saving is smaller and WebP or PNG-8 may be better.
Yes. Pick any colour with the background control before converting.
No. The conversion runs in your browser.
The background colour applies to the whole batch in one pass. For different colours per image, run the tool again with each colour on the relevant files.
85–92 is a good starting point for most photos — high enough that quality loss is essentially invisible, while still meaningfully smaller than the PNG original.
It converts the same way — the background colour setting simply has nothing to fill, since there are no transparent pixels to replace.
No — only the format, background handling and compression change. Pixel dimensions stay exactly as they were in the source PNG.
Yes — a preview of the converted JPG, including the chosen background colour where it applies, is shown before you commit to downloading.