Convert JPG to PNG
For when a tool, a form or a template insists on PNG.
- Nothing is uploaded
- Works offline after first visit
- Open source
- No watermark · limit is your device’s memory; phones hold less
Convert JPG or JPEG images to PNG in your browser. 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.
You do not convert JPG to PNG to gain quality: the detail JPG compression discarded is gone, and the PNG will only be a faithful copy of the JPG as it is now. You convert because something requires PNG, such as an upload form, a presentation template, or an image editor that will be layering the picture and re-saving it many times, where PNG stops the quality getting worse with each save.
The output is a lossless PNG of the decoded JPG. Files get bigger, typically three to eight times, because PNG stores every pixel. If you need a transparent background, that is an editing job rather than a conversion; PNG output here has no transparency because the JPG had none.
Have another type of picture? Convert any image to PNG 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 JPG files onto the page, or tap to pick them. Batches are fine.
- There are no quality settings: PNG is lossless, so the output matches the decoded image exactly.
- Download each PNG, 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
Will converting to PNG improve the quality?
No. It preserves the quality exactly as it is, which is the point: further edits and saves will not degrade it the way re-saving a JPG does.
Why is the PNG so large?
PNG is lossless. A 2 MB JPG can become a 10 MB PNG. That is normal, and it is the reason to convert only when PNG is actually required.
Does the PNG keep the EXIF data?
No. Browsers do not write EXIF into PNG. If you need the camera and location data preserved, keep the original JPG alongside the PNG.
More image tools
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GIF frame splitter
Pull every frame out of an animated GIF as a PNG, with each frame’s delay. It stays on this device.
Add text to GIF
Write a caption on every frame of an animated GIF and drag it where you want it. Done on this device, and the GIF is not uploaded.
Merge GIFs
Join several animated GIFs end to end, in the order you choose. They are put together on this device, and the GIFs are not uploaded.
Other conversions
Guides
- A free Convertio alternative with no file size capConvertio's free plan caps both file size and how many conversions you get per day. Here is an alternative with no such ceiling.
- A free Zamzar alternative with no daily limitZamzar's free service limits how many files you can convert and how big each can be. Here is an alternative with no such cap.
- 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.
- JPG, PNG, WebP or HEIC: which image format to useA practical rule for each job, and the conversion to get there.
- 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.