Convert JPG to PNG
For when a tool, a form or a template insists on PNG.
Done
Open the network tab. It stays empty.
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.
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
Your browser already knows how to decode JPG, PNG, WebP, AVIF and SVG. Stayput draws each image onto an off-screen canvas and asks the browser to encode it again in the format you picked. HEIC input goes through the libheif WebAssembly decoder, and JPEG XL (or AVIF, in a browser without native support) through the Squoosh decoders compiled to WebAssembly, fetched once as program files and cached. Nothing here needs a server because nothing here is beyond what a browser can do on its own.
Compared with upload-based tools: Online converters upload your image, convert it on their machine and hand it back through an ad-covered download page. This does the same conversion with the same codecs, on your device, in less time than the upload.
Verify it yourself. Load this page, turn off Wi-Fi or switch to airplane mode, and run the tool. 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
HEIC to JPG
Turn iPhone and iPad photos into JPG or PNG files that open anywhere. Your photos never leave this device.
Image Converter
PNG, JPG, WebP, GIF, BMP, AVIF, JPEG XL, SVG and HEIC in. JPG, PNG or WebP out. Converted on your device.
Compress & Resize Images
Make photos small enough to email or upload. Batch resize, set a quality, see the savings before you download.
Remove EXIF Data
See what a photo reveals, then delete it. Lossless: pixels are untouched, only the metadata is removed.
Other conversions
Guides
- What is EXIF data, and what does a photo reveal?The information stored inside a photo file, what it can give away, and how to see and remove it.
- How to reduce an image's file sizeTwo settings do almost all the work. Here are the numbers to use for email, forms, listings and websites.
- JPG, PNG, WebP or HEIC: which image format to useA practical rule for each job, and the conversion to get there.