Convert JPG to PNG Online — Free
Convert JPG to PNG online — lossless output ideal for editing, layering, or archival. Runs entirely in your browser, no signup required.
How to convert JPG to PNG
- 1
Add your JPG file
Drop or select a .jpg file. Files up to 50MB process locally in your browser — nothing uploaded.
- 2
Run the conversion
Your JPG decodes onto a Canvas, then re-encodes as PNG with DEFLATE compression. No further quality is lost, but file size grows because PNG preserves every pixel — including any compression artifacts already baked into the JPG.
- 3
Download your PNG
One click saves the result as a .png file. Your original file stays on your device.
Why convert JPG to PNG?
PNG is lossless and supports an alpha channel, making it the correct format when you plan further edits (JPG's repeated save-and-reload accumulates quality loss) or need transparency support. PNG is also what many design tools, older Office versions, and certain CMS platforms require for logo and graphic uploads.
Common JPG to PNG use cases
- Preparing a JPG photo for multi-step edits in Photoshop, GIMP, or Affinity Photo without cumulative quality loss between saves
- Uploading to platforms that require PNG (some WordPress plugins, forum signature uploaders, certain e-signature and badge tools)
- Layering a photo in a design file where you'll manually cut out a transparent background in Figma, Sketch, or Photoshop
- Archiving a master copy of an important photo before distributing smaller JPGs or WebPs for the web
What file size to expect
A 4000×3000 smartphone JPG at typical quality 85 is around 2-4 MB. Re-encoded as PNG the file jumps to 8-20 MB — roughly 3-5× larger, because PNG can't compress the JPG's already-quantized color data efficiently. Flat graphics compress better: a 1920×1080 JPG graphic at 500 KB might become a 1.2 MB PNG.
Technical notes: JPG → PNG
PNG's DEFLATE compression (zlib) works well on graphics with repeated or predictable pixel patterns — screenshots, UI, line art, illustrations — but poorly on photos because photographic content has fine-grained color variation that doesn't compress. The JPG's 8×8 DCT blocks and quantization tables have already introduced subtle artifacts; PNG encodes those faithfully rather than cleaning them up. For a crisp JPG-free source you'd need to go back to the original RAW or uncompressed master — conversion can't recover information that's already been discarded.
Compatibility and browser support
PNG is supported in every modern browser, operating system, and photo viewer — it's been a web standard since 1996. JPG input is universal. The only edge case is very old software (pre-2000s) that lacks PNG support, which is rare today.
JPG vs PNG
| JPG | PNG | |
|---|---|---|
| File size | Smaller (lossy) | Larger (lossless) |
| Quality | Lossy (adjustable) | Lossless |
| Transparency | No | Yes |
| Browser / app support | Universal | Universal |
| Best for | Photographs, web images, sharing | Screenshots, logos, graphics with transparency |
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Frequently Asked Questions
Will quality improve?
No — PNG can't add detail that's already been compressed away. It preserves whatever the JPG encoded, artifacts included.
Why is the PNG so much larger?
Photos have fine color variation that PNG's lossless compression can't reduce efficiently. JPG discarded most of the original bits; PNG has to preserve every remaining one verbatim.
Does PNG add transparency automatically?
No — a JPG has no transparency info to preserve. The resulting PNG keeps the JPG's solid background. You'd need to edit it afterward to cut out specific areas.
Will EXIF and metadata survive?
No. Canvas-based conversion drops EXIF, GPS, color profiles, and camera tags regardless of input format.
Is there a file size cap?
Yes — 50MB per JPG input. Everything runs in your browser using your device's memory.
Lossless from a JPG — what does that actually mean?
It means no further loss during this step. The JPG's existing compression artifacts are preserved exactly in the PNG; no new artifacts are introduced.