About this tool
JPG to PNG Converter, Convert JPG to PNG Losslessly
Convert JPG to PNG in your browser. The conversion is lossless. The JPG's pixels are preserved exactly in the PNG output. Useful when you need a format that supports transparency, or when downstream software requires PNG. Nothing uploads.
Why use OmegaPix
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Lossless from this point forward : Once converted to PNG, the image can be edited and re-saved without further quality loss. JPG would compound loss with every save.
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Transparency-ready : PNG supports alpha. After conversion you can use an image editor to mask out a background and ship a transparent version.
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No upload : Conversion runs in your browser. Personal photos, screenshots, design assets. All stay on your device.
How it works
Drop your JPGs
Batch is fine. Convert dozens at once.
Click Convert
PNG is lossless. No quality settings, no decisions needed.
Download the PNGs
Each file gets a .png extension. Download individually or as a ZIP.
Frequently asked questions
Will the conversion be lossless?
The PNG encoding is lossless. But the original JPG's compression artefacts (which happened when the JPG was first saved) are preserved exactly. You can't un-do them by converting.
How much larger will the PNG be?
Typically 5-10× the source JPG. A 1 MB JPG photo becomes a 6-10 MB PNG. PNG's lossless compression doesn't match JPG's lossy ratio for photos.
Will my JPG's EXIF data survive?
PNG supports a limited form of metadata (text chunks) but most viewers don't read it. EXIF is dropped during conversion. If you need the metadata, keep the JPG.
Why would I convert JPG to PNG?
To prevent compounding quality loss across multiple saves, to enable adding transparency later, or because downstream software requires PNG.
Can I batch convert?
Yes. Drop multiple JPGs and convert in one pass.
Is anything uploaded?
No. Verify in DevTools → Network.
What about progressive JPGs?
Both progressive and baseline JPGs are accepted. The output PNG is the same regardless of source encoding.
Can I add transparency during conversion?
Not from this tool. The JPG has no transparency information to extract. You'd need an image editor (Photoshop, GIMP) to mask a background after conversion.
For web delivery, should I use PNG or WebP?
Almost always WebP. WebP-lossless is typically 25% smaller than PNG with identical visual quality. Use PNG only if you need legacy compatibility.
What's the file size cap?
50 MB per JPG on desktop, 25 MB on mobile. The memory guard prevents browser crashes on very large files.
When to use this tool
Editing without compounding loss
JPG re-saves lose quality every time. Convert to PNG once, edit freely, only export to JPG at the very end.
Software requires PNG
Some design tools, presentation software, and embedded systems accept PNG only.
Prepping for transparency
You can't add transparency to a JPG, but you can convert to PNG and then mask the background in any image editor.
When not to use this tool
You want a smaller file
PNG of a photo is 5-10× larger than the source JPG. Conversion doesn't reduce size, it usually increases it dramatically.
Already in WebP-friendly destination
For web delivery, WebP is better than PNG (smaller, also lossless). Convert JPG → WebP-lossless instead.
Print workflows
Print pipelines often want TIFF or the original RAW, not PNG. PNG is a web format primarily.
Technical details
What "lossless conversion" means here
The conversion decodes the JPG's pixels (which were lossy when originally encoded) and writes them byte-for-byte into a PNG. The PNG itself adds no further loss. But the original JPG compression artefacts are preserved exactly, converting doesn't un-do them.
File size will grow
PNG of a photographic image is typically 5-10× the source JPG's size. A 1 MB JPG becomes a 6-10 MB PNG. This is expected, PNG's lossless compression is much worse on photographs than JPG's lossy compression.
PNG variants used
OmegaPix outputs PNG-24 (or PNG-32 if the source had transparency, though JPG never does). Indexed PNG-8 is not used. It would be smaller but limits colour to 256 entries, which corrupts photos.
When this conversion makes sense
Editing pipelines where compounding JPG loss is a concern. Transparency masking. Software that doesn't accept JPG. For web delivery or sharing, this conversion is the wrong direction, keep JPG or convert to WebP/AVIF instead.
Your files stay on your device
JPG decoding and PNG encoding both run inside your browser. Your photo never reaches a server. Verify in DevTools → Network during conversion: zero outgoing requests.