Conversion
JPG to PNG Converter
Convert JPG to PNG when you need a lossless file to work from.
Your files stay on your device - processed locally via WebAssembly, never uploaded
Drop your files here
JPEG, PNG, WebP, AVIF, HEIC, TIFF, GIF, SVG, BMP, PDF - or paste (Ctrl+V)
Output Format
Web Optimized
Lossless
Special
Embed this tool on your website
Copy this code to add the JPG to PNG Converter to your site for free. It runs entirely in your visitors' browsers - no API key, no usage limits.
<iframe src="https://optipix.art/embed/jpg-to-png" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="JPG to PNG Converter by OptiPix" loading="lazy"></iframe> <p style="font-size:12px">Free tool by <a href="https://optipix.art/jpg-to-png">OptiPix JPG to PNG Converter</a></p>
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About JPG to PNG Converter
Last updated: October 2026
Converting JPG to PNG does not improve the image - the compression artefacts a JPEG already carries are baked into its pixels and no conversion undoes them. What it does give you is a lossless container, which matters when the file is going to be edited and re-saved repeatedly, pasted into software that expects PNG, or used somewhere an alpha channel will be added later. Each re-save of a JPEG degrades it again; a PNG can be opened and written a hundred times and come out identical. This converter decodes the JPEG in your browser and writes a PNG with OxiPNG, which searches for the smallest lossless encoding, so the file is as small as lossless allows. Expect it to be larger than the JPEG regardless - that is what lossless costs. Nothing is uploaded, there is no account, and there is no limit on how many files you convert.
How It Works
The JPEG is decoded in your browser to raw pixels, then written as PNG with OxiPNG compiled to WebAssembly, which tries multiple lossless strategies and keeps the smallest. Everything runs on your own CPU, so no file is uploaded and there is no size or batch limit.
Use Cases
- •Getting a lossless working copy before a round of edits that will be saved repeatedly
- •Meeting a PNG-only requirement in a CMS, design tool or upload form
- •Preparing a photo for background removal, which needs an alpha-capable output format
- •Converting JPEG assets for software that will not accept them
- •Batch-converting a set of photos into PNG for an editing pipeline
You Might Also Like
If you find JPG to PNG Converter useful, check out these related tools: PNG to JPG Converter, HEIC to JPG Converter, and WebP to JPG Converter. All tools run entirely in your browser with no uploads or signups required.
Explore more: Browse all tools · Step-by-step guides · Tips & tutorials · Compare tools
Frequently Asked Questions
Does converting to PNG improve the image?
Then why convert at all?
Will the PNG be transparent?
Why is the file so much larger?
Is anything uploaded?
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