PNG is great for screenshots and graphics, but its lossless encoding makes files large — often several times bigger than a visually identical JPG. Converting to JPG is the quickest way to make a photo-like image small enough for email, forms, and upload limits.
This converter decodes and re-encodes your image locally in your browser tab, preconfigured for JPG output. Because JPG has no transparency, the tool asks you to pick a background color whenever a PNG has transparent areas — it never silently fills them.
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This is Convert Image Format preconfigured for this task — open the full tool for every option.
Select one or more images.
Choose the target format; consequences (like losing transparency in JPEG) are shown before converting.
Pick a background color if converting transparency to JPEG.
Convert and download individually or as a ZIP.
Every output is re-decoded to confirm it parses as the target format with the expected dimensions; failures are isolated per file.
PNG stores pixels losslessly, which is expensive for photos and gradients. JPG discards visual detail your eye barely notices, typically cutting file size by 60–90% for photographic content.
JPG has no alpha channel. When the tool detects transparency it requires a background color (white by default) and shows a warning before converting, so nothing is filled without your say-so.
No. The file is decoded and re-encoded by code running in your browser tab. You can watch the network panel while converting — no request carries your image.
Technical guidance for choosing settings and reviewing the result.
There is no quality percentage that makes every image exactly 1 MB or 100 KB. A reliable target-size workflow measures real encodes, preserves the best result under the limit, and tells you when resizing is necessary.
8 min read · Reviewed August 2026