Convert PNG to JPG
Turn large PNG files into compact JPGs without sending them anywhere.
- Nothing is uploaded
- Works offline after first visit
- Open source
- No watermark · limit is your device’s memory; phones hold less
Convert PNG images to JPG in your browser with a quality slider and a background colour for transparent areas. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The size limit is your device’s memory, and phones hold less; give the page a short while after one visit to save itself for offline use, and then it works offline.
Done
Free, no ads. Support StayPut
Open the network tab. Your files never appear in it.
Add files and run the tool to see every request this tab makes.
Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.
PNG is the right format for screenshots, logos and anything with sharp edges or transparency, but for photos and web uploads it is often ten times larger than it needs to be. Converting to JPG trades a little precision for a much smaller file, which is usually the right trade for a photo you are about to email or post.
JPG cannot store transparency, so you choose what colour fills the transparent areas. White is the default; pick the background colour of wherever the image will sit for a seamless result. The quality slider at 90 is visually identical to the original for photos; 75 to 80 is a good choice for web use.
Have another type of picture? Convert any image to JPG takes PNG, WebP, HEIC, GIF, BMP, AVIF and more.
Holding a .jpeg file? That is the same format as .jpg: see JPEG to JPG.
How it works
- Drop your PNG files onto the page, or tap to pick them. Batches are fine.
- Adjust the quality slider if you want a smaller file, or leave it at 90.
- Download each JPG, or all of them as one zip.
In your browser, not on a server
Stayput first reads the opening bytes of each file, where every image format writes its signature, so it knows what the file really is whatever it is called. Your browser decodes JPG, PNG, WebP, GIF, BMP, AVIF and SVG itself; TIFF goes through UTIF.js, HEIC through the libheif WebAssembly decoder, and JPEG XL (or AVIF, in a browser without native support) through the Squoosh decoders, all served from this site and cached. The browser re-encodes JPG, PNG and WebP; PDF, ICO, GIF, BMP and TIFF files are written by small encoders in the page. Nothing here needs a server.
Compared with upload-based tools: Online converters upload your image, convert it on their machine, keep it for hours and cap you at a few files a day. This does the same conversion on your device, for as many files as your device’s memory can hold, with no upload to wait for.
Verify it yourself. Give the page a short while after one visit to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.
Questions
What happens to transparent parts of the PNG?
They are filled with the background colour you choose in the options. JPG has no transparency, so this step is unavoidable in any converter.
Should I convert a screenshot to JPG?
Usually not. Text and thin lines pick up visible artefacts in JPG. Keep screenshots as PNG, or use the compress tool to shrink the PNG losslessly. Convert to JPG when the image is a photo.
Is anything uploaded?
No. The conversion is done by your browser’s own image encoder on your device. Check the network panel: no request carries your image.
More image tools
Image Converter
Drop any image, see what it really is, pick what you need. Converted on your device.
Resize GIF
Set a new width and height for an animated GIF, by percent or in exact pixels. The animation plays as before, and the GIF stays on this device.
Crop GIF
Drag a box over the part of the animation you want to keep. Every frame is cropped to it, and the GIF never leaves this device.
Change GIF speed
Make an animated GIF faster or slower, or play it in reverse. Done on this device, and the GIF is not uploaded.
Other conversions
Guides
- JPG, PNG, WebP or HEIC: which image format to useA practical rule for each job, and the conversion to get there.
- A free FreeConvert alternative with no processing time capFreeConvert's free plan limits the processing time for each file and for the day. Here is an alternative with nothing to time out.
- Is CloudConvert safe?For most files, yes: it is an established, certified service. The real question is whether a given file should leave your computer at all.
- Is FreeConvert safe?FreeConvert is a legitimate service with a clear deletion policy. Whether it is safe for a particular file depends on whether that file should be uploaded anywhere.
- Is Convertio safe?Convertio is a well-known converter with a published deletion policy. For private files, the safer choice is a converter that never receives them.