How to Convert JPG to PNG
Converting JPG to PNG is a special-purpose move: it will not magically restore quality or add transparency — nothing can put back detail that JPG compression already discarded. What it does is give you a lossless container: no further degradation no matter how many times you open and re-save, and compatibility with tools and pipelines that only accept PNG. Common reasons include archival masters, print workflows, and software that rejects JPG outright. Re-Sizefy converts JPG to PNG in your browser, in batches, with nothing uploaded.
Step-by-step: convert JPG to PNG
- Drop in your JPG files. One file or a whole batch — drag them into the drop zone.
- Select PNG as the output format. PNG is lossless, so there is no quality slider to worry about; what you put in is the maximum quality you get out.
- Resize first if the PNG would be enormous. PNG files are big, and a 6000px photo becomes a very heavy PNG. Downscale to the size you actually need before converting.
- Download. Single files download directly; batches arrive as one ZIP. Consider a
-pngsuffix so the lossless copies are easy to spot.
Quality tips
Be realistic about expectations: a JPG converted to PNG looks exactly like the JPG did — the conversion preserves quality, it does not improve it. Its value is stopping further loss, not reversing past loss.
If your end goal is a small file for the web, PNG is usually the wrong answer — WebP or JPG will be far smaller. Only choose PNG when something specifically requires it.
For screenshots with text and flat colors, PNG is genuinely the best format: crisp edges, no artifacts, and often smaller than a high-quality JPG of the same image.
Things to watch out for
- Expect bigger files. A photo saved as PNG is typically 3–10x larger than the JPG it came from. That is normal — lossless costs bytes.
- No transparency appears. JPG has no alpha channel, so there is nothing to recover. Converted PNGs have a fully opaque background.
- Do not use PNG as an editing loop. Converting JPG → PNG → JPG again just wastes space. Convert once, at the end of your workflow.
Try it now
Open the free Re-Sizefy converter — drag in your JPGs, choose PNG, download the ZIP. No sign-up, no upload.
Frequently asked questions
Does converting JPG to PNG improve quality?
No. It preserves the JPG's current quality losslessly — it cannot restore detail that compression removed. Convert for compatibility or archival, not for enhancement.
Why is the PNG so much bigger than the JPG?
PNG is lossless: it stores every pixel exactly. That precision costs 3–10x the bytes of a compressed JPG photo. Resize before converting to keep sizes sane.
When should I actually use JPG to PNG?
When a tool, printer, or pipeline requires PNG; when you want a lossless master to stop further degradation; or for text-heavy screenshots where PNG stays crisp.
Is my image uploaded to a server?
Never. The conversion runs entirely in your browser — no upload, no account, no tracking.