JPG to PNG Converter

Convert JPG to PNG without uploading anything: the file is read, decoded, and re-encoded entirely inside your browser tab, so it never leaves your device. Most people reach for this conversion for one of two real reasons, either a platform requires PNG specifically (logos, app icons, design assets, upload forms) or they want a lossless format so repeated edits stop degrading the image. Both JPG and JPEG name the exact same format, so anything below applies whether your file ends in .jpg or .jpeg.

What this conversion actually does (and does NOT do)

JPEG is a lossy format built on DCT compression, while PNG is lossless and uses DEFLATE. Converting decodes the already-degraded JPEG pixels and re-encodes them losslessly, which means any existing JPEG artifacts (block edges, ringing halos around text and sharp lines) are preserved pixel-for-pixel rather than removed. The conversion cannot restore detail that JPEG compression already discarded; it simply freezes the current state and prevents further loss on later edit and re-save cycles.

Expect the file to get bigger, often 5 to 10 times larger, because PNG stores every pixel with no lossy step. A photographic JPEG that was a few hundred KB can balloon into several MB as a PNG. There is also a common myth to clear up: converting does NOT create a transparent background. JPEG has no alpha channel at all, so the resulting PNG keeps the same solid background you started with. PNG itself supports an 8-bit alpha channel plus 24-bit truecolor (16 million colors) and even 48-bit deep color, whereas JPEG is 8-bit-per-channel YCbCr with no transparency, so the capability exists in PNG but conversion alone never fills it in.

When to choose JPG to PNG vs the alternative

PNG is the right target for line art, screenshots, text, logos, charts, and flat-color graphics, the cases where JPEG's lossy compression produces visible halos. For continuous-tone photographs, PNG mostly just inflates the file with no visual benefit, and the better move is often to keep JPEG or recompress it. If your goal is a smaller file for upload or email rather than losslessness, going the other direction with PNG to JPG conversion usually shrinks the result dramatically. If you only need PNG because you want transparency, note that conversion will not deliver it; you have to erase the background separately.

How to convert

1. Drop one or many JPG/JPEG images into the converter; they are read locally, with no upload.
2. The output format is already pre-selected to PNG. PNG is lossless, so there is no quality slider to set here.
3. Because PNG is your target, the alpha channel is available but stays empty, your solid JPEG background carries over unchanged.
4. Click Convert. A single image downloads directly, and multiple images download together as a ZIP with no count cap.

No upload. It runs on your device.

The conversion engine is written in Rust and compiled to WebAssembly, and it executes inside your browser tab. There are zero network requests for your file, which you can confirm yourself by opening the DevTools Network tab while you convert. After the page loads once, it keeps working offline, and because nothing was ever uploaded there is nothing on a server to delete afterward. That matters here because JPEGs are often private screenshots, ID scans, or personal photos that should never touch a stranger's machine.

No limits

Batch is unlimited. There is no file-size cap, no per-day quota, no watermark, no sign-up, and no ads. Convert one image or a few hundred in a row, the only constraint is your own device.

Frequently asked questions

Does converting JPG to PNG improve or restore image quality?

No. Converting to PNG cannot recover detail that JPEG compression already threw away, since the conversion only reads the pixels that already exist. What it does do is freeze the current state losslessly, so future edits and re-saves no longer add more degradation.

Why is my PNG file so much bigger than the original JPG?

PNG is lossless and stores every pixel without JPEG's lossy compression, so files commonly grow 5 to 10 times larger. A photo that was a few hundred KB as a JPEG can easily become several MB as a PNG, which is expected and not a sign of anything wrong.

Will converting JPG to PNG give it a transparent background?

No. JPEG has no alpha channel, so the PNG inherits the same solid background you started with. Real transparency requires actively removing or erasing the background in an editor, which a format conversion alone never does.

Is converting JPEG to PNG lossless, or does it lose quality?

The PNG encode step itself is lossless, so no new quality is lost during conversion. However, any artifacts baked into the source JPEG (blocking, ringing around edges) are carried over pixel-for-pixel into the PNG because they are already part of the image data.

When should I use PNG instead of JPG?

Choose PNG for line art, screenshots, text, logos, charts, and flat-color graphics, where JPEG's lossy compression creates visible halos. For continuous-tone photographs, PNG usually just inflates the file with no visual gain, so JPEG or WebP is the better fit there.

Can I convert multiple JPGs to PNG at once (batch)?

Yes. You can drop many JPG/JPEG files together and convert them in one pass. A single image downloads on its own, while multiple images come back as a ZIP, and there is no file-count or size limit.

Is it safe to convert private or sensitive JPEG photos online?

Yes, because the conversion runs entirely in your browser using local WebAssembly and your file is never sent anywhere. That makes it appropriate for ID scans, private screenshots, and personal photos that you would not want sitting on a third-party server.

Do my files get uploaded to a server when I convert here?

No. Processing happens client-side with a Rust-to-WebAssembly engine, and there are zero network requests for your image. You can verify this directly by watching the DevTools Network tab while a conversion runs.

Does this work offline and is there a file size or daily limit?

Once the page has loaded, the converter keeps working with no connection because all the code is already in your browser. There is no file-size cap and no daily conversion quota, since there is no server doing the work.

What's the difference between JPG and JPEG (are they the same)?

They are the same format with two interchangeable extensions; the shorter .jpg dates from older systems that limited extensions to three letters. A file ending in .jpg behaves identically to one ending in .jpeg, and this converter treats them the same way.

Will the converted PNG keep the same resolution and dimensions?

Yes. Conversion preserves the exact pixel width and height of the source image; only the encoding changes from lossy JPEG to lossless PNG. If you need different dimensions afterward, resize the result as a separate step.

Related tools: go the other way with PNG to JPG, shrink an oversized PNG using the image compressor, or explore every option on the image tools hub.