Convert
PNG to JPG, transparency handled
Convert PNGs into smaller JPGs, choosing what color fills any transparent areas, entirely locally.
For the best results: Pick the background color first, JPG has no transparency, so transparent areas must become white or black. Screenshots convert well at 92%.
Advanced settingsoptional, defaults work well
Processed entirely in your browser, your photos are never uploaded, logged, or stored.
What is PNG to JPG?
PNG to JPG is a free file converter that converts PNGs into smaller JPGs, filling transparent areas with a background color you choose. Each image is decoded and re-encoded by your own browser's graphics engine, so your photos are never uploaded to a server. There is no queue, no watermark, and no account to create, and it keeps working with your connection off.
- ✦Runs entirely in your browser. Nothing you enter is ever uploaded
- ✦No account, no sign-up, and no data leaves your device
- ✦Works offline once the page has loaded
See it in action
A 4 MB PNG screenshot needs to go in an email that caps attachments.
What you drop in
screenshot.png with transparent rounded corners, background set to White
What you get
screenshot.jpg a fraction of the size, with the transparent corners cleanly filled white rather than turning black, verified pixel-by-pixel in testing.
Tip: The background choice matters most for dark-mode screenshots: white fill looks natural in documents, black fill suits dark presentations. For screenshots full of small text, keep quality high, JPG artefacts show on text first.
Use cases
What people use it for
Shrink hefty PNG screenshots into JPGs before attaching a dozen of them to a support ticket.
Flatten a transparent logo onto a clean white background for a document that requires JPG.
Convert PNG photo scans into far lighter JPGs for a slow-loading website gallery.
Who uses PNG to JPG?
Support agents
lighten screenshot-heavy tickets and knowledge base articles so pages and attachments load without dragging
Small business owners
flatten transparent logo files onto white for invoices, letterheads, and directories that only take JPG
Web publishers
convert bulky PNG photo exports into lean JPGs before uploading galleries to bandwidth-sensitive pages
How it works
- 1Choose your files. They open in your browser, not on a server.
- 2Your device converts, compresses, or resizes them locally, with no upload.
- 3The converted files download straight back; nothing is kept anywhere.
Tips for the best results
- Match the background fill to wherever the JPG will live: white for documents and light pages, black for dark-mode designs and presentations.
- Leave interface screenshots you may zoom into later as PNG; convert the photographic ones.
- Hold on to the PNG master, since every JPG re-save degrades a little more.
- Sort a batch by file size first and convert the heavyweight photos for the quickest savings.
- If text in a converted screenshot looks fuzzy, that image belonged in PNG; just delete the JPG copy.
FAQ
Frequently asked questions
Why are PNG files so much bigger than JPGs?
PNG is lossless: it must preserve every pixel exactly, which is wonderful for flat graphics but wasteful for photographs, where millions of subtly varying colors barely compress. JPG was designed for exactly that photographic content, discarding imperceptible detail to achieve a fraction of the size. The same holiday photo can shrink enormously just by switching format.
What happens to transparent areas when converting to JPG?
JPG has no concept of transparency, so those regions must be filled with something solid. This tool lets you choose white or black before converting, so a logo with a see-through background lands cleanly on white for a document or on black for a dark design, instead of whatever a converter happens to pick for you.
When should I not convert a PNG to JPG?
Keep screenshots, diagrams, line art, and logos as PNG whenever crispness matters, because JPG compression scatters faint noise around sharp edges and small text, making interfaces look smudged. The conversion pays off for photographic content: scans, camera photos, and artwork with continuous tones, where the size drop is huge and the artefacts hide in natural texture.
Do my screenshots stay private during conversion?
Completely. The flattening and re-encoding run against a local canvas inside your browser, so screenshots that happen to show passwords, client records, or unreleased work travel exactly nowhere. There is no upload step to intercept and no server-side copy to worry about deleting later; close the tab and the only files that exist are yours.
How many PNGs can I convert at once?
As many as you can select. Batches process locally with no daily quota, no watermark, and no locked features waiting behind a subscription; that pricing machinery exists on other sites to recover their server costs, and this tool has none. Converting a large screenshot archive is limited only by how fast your own computer runs.
Why did my transparent background turn black when converting to JPG?
Many converters fill the missing transparency with black by default, which ruins logos and cut-out images. Here you pick the fill yourself before converting, white or black, so the flattened image suits a light document or a dark design rather than surprising you afterwards.
Are JPG and JPEG the same thing?
Yes, they are one format with two spellings. Early Windows systems limited file extensions to three letters, so JPEG became JPG, and both extensions survived long after the limit vanished. Every program that reads one reads the other, so there is never a need to convert between them.
How do I make a picture file smaller for uploading?
If it is a photo saved as PNG, converting it to JPG is usually the single biggest win, often shrinking it many times over. Pair that with resizing the image closer to the dimensions it will actually be displayed at, and almost any upload limit becomes comfortable to clear.
Are there any usage limits?
None. Everything is generated locally in your browser, so there is no server cost, no metering, and no daily cap, use it as many times as you like, completely free.
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