Convert JPG to PNG Online for Free

What a JPG to PNG Converter Actually Does

A jpg to png converter re-encodes a JPG file's pixel data into PNG's lossless format. Every pixel already baked into the JPG — including any compression artifacts it picked up when it was originally saved — is copied over exactly, then stored using PNG's DEFLATE compression instead of JPG's lossy DCT compression. From that point forward, no further quality is lost each time the file is opened and re-saved. This tool converts jpg to png directly in the upload form below, with no software to install and no cap on how many times you can use it.

The most common reason to convert jpg to png is compatibility: some design tools, print workflows, favicon generators, and content platforms require a PNG input regardless of what the original photo or graphic was saved as. It's worth being clear up front about one thing this conversion does not do: it doesn't add transparency. A JPG never had an alpha channel, so there's no transparency data to carry over — the PNG you get back will be fully opaque, just like the source. If you need an actually transparent background, you need a background-removal step first, not a format conversion.

How to Convert JPG to PNG

The process takes a few seconds:

1. Drop a JPG onto the upload zone, or click it to browse for one — nothing stops you from queuing several at once.
2. PNG is a lossless format, so this step skips the quality slider entirely — the pixel data already in your JPG carries over exactly as-is, with no further compression loss.
3. If you're converting several files, batch mode is automatically available — queue up to 20 JPG files in one go instead of repeating the process file by file.
4. Need the image resized too? Enter custom output dimensions before you hit convert and both changes happen in the same pass.
5. Hit Convert. Each JPG turns into a PNG, and the before/after comparison is there to confirm the result before you save anything.
6. Batches come back bundled into a single ZIP, so there's no need to save each converted PNG individually.

No account, no watermark — you get a standard PNG file, readable by any browser, editor, or operating system.

Why Convert a JPG to PNG

A handful of real situations call for this specific conversion:

• Software that requires PNG input. Favicon generators, certain print-on-demand platforms, app icon builders, and some CMS media libraries only accept PNG files, even when the underlying image was originally a photo.
• Preparing to edit in layers. Some design and photo-editing pipelines standardize on PNG as the working format before compositing, retouching, or adding overlays, since it avoids re-introducing JPG compression artifacts on every intermediate save.
• Archiving before further lossy edits. If a JPG is going to be cropped, color-corrected, and re-saved multiple times, converting it to PNG first stops those individual edits from stacking additional generational quality loss on top of each other — each PNG save after that point is exact.
• Adding it to a design as a base layer. Vector or layout tools sometimes handle PNG placement more predictably than JPG, particularly when the image will later be composited with other elements.
• Meeting a client or platform's stated file-format requirement — some briefs simply specify PNG delivery regardless of the source format, and this handles that requirement without touching an editor.

It's usually not worth the extra step for a photo that will only ever be viewed as-is on the web, since the PNG version will be noticeably larger with zero visible quality gain — you can't undo compression that's already happened. It's most useful as a preparation step, not an image-quality upgrade.

JPG vs. PNG: The Technical Differences

These two formats were designed for opposite priorities. JPEG, standardized in 1992 by the Joint Photographic Experts Group, trades some fidelity for much smaller files on photographic content. PNG arrived in 1996 as a lossless, patent-free format built to store exact pixel data, with an alpha channel GIF never had.

Aspect	JPG	PNG
Compression type	Lossy (DCT-based)	Lossless (DEFLATE)
Transparency	Not supported	Full alpha channel, up to 256 levels
Best for	Photographs, continuous-tone images	Screenshots, logos, line art, images needing transparency or exact pixels
File size for a photo	Small to moderate	Considerably larger for the same photo
Editing and re-saving	Quality degrades slightly with every lossy re-save	No quality loss on repeated saves
Color depth	8 bits per channel	Up to 16 bits per channel
Format age	Standardized 1992	Introduced 1996

An important nuance that trips people up: converting a JPG to PNG cannot recover detail the JPG already lost. If the source JPG was saved at a low quality setting, the blocky compression artifacts around edges and the softened fine detail are baked into the pixel data. PNG will store that exact — flawed — pixel data losslessly from that point forward, but it can't reconstruct information that was already discarded. The gain from converting isn't better image quality; it's stopping further quality loss and gaining PNG's other properties, like being a format some tools require.

On file size, expect the PNG to be meaningfully bigger than the source JPG in most cases — sometimes several times larger — because PNG's lossless compression can't match JPG's aggressive, perceptually-tuned compression on photographic content. That's the trade you're making: bigger file, no ongoing quality loss, plus PNG-specific compatibility.

How PNG's Lossless Compression Actually Works

It helps to understand why PNG can guarantee no further quality loss when JPG can't. PNG uses a two-stage process. First, a filtering step predicts each pixel's value based on neighboring pixels already processed (above it, to its left, or a combination of both) and stores only the difference between the prediction and the actual value — a technique that tends to produce long runs of small numbers or zeros for images with smooth gradients or flat color regions, which compress extremely well. Second, that filtered data is run through DEFLATE, the same general-purpose lossless compression algorithm used inside ZIP files, which finds and eliminates repeated patterns in the byte stream.

Crucially, both of those steps are fully reversible — nothing is estimated, rounded, or thrown away at any point, unlike JPG's quantization step. That's what makes PNG's compression lossless: decompressing a PNG always reconstructs the exact same pixel values that went in, no matter how many times you open and re-save the file. The trade-off is that PNG's filtering and DEFLATE combination isn't nearly as effective on photographic content full of subtle, non-repeating gradients as JPG's frequency-domain approach is, which is exactly why a JPG-sourced photo turns into a noticeably larger file once it's stored as PNG — the pixel-level noise and detail a camera sensor captures simply doesn't compress away the way flat-color graphics do.

JPG to PNG in Common Design and Development Workflows

A few specific, recurring situations explain most real requests for this conversion. Web and app developers building a favicon or app icon set almost always need a PNG source, since favicon generators and app store submission tools are built around PNG's support for exact pixel control and transparency — even when the original artwork started life as a JPG photo or mockup. Graphic designers assembling a composite in a layout tool frequently convert any JPG assets to PNG first, specifically so that later edits, retouching, or masking on that layer don't compound additional JPG compression artifacts on top of whatever the layer already has.

Print shops and packaging vendors are another common source of this requirement: many production pipelines standardize on PNG (or an even higher-fidelity format) for anything that will be color-corrected, resized, or composited before printing, since a lossy re-save at that stage could visibly degrade the final product. Similarly, teams handing off marketing or brand assets to another agency or client often standardize deliverables as PNG regardless of the original source format, simply because it removes any ambiguity about whether further lossy compression has already happened to the file being handed over.

Alternatives to an Online JPG to PNG Converter

If a browser-based converter doesn't fit your workflow, there are other routes:

• Desktop editors. Photoshop, GIMP, Affinity Photo, and Paint.NET all export to PNG through a standard save-as or export dialog, useful if you're already making edits in the same session.
• Operating system tools. macOS Preview and Windows Photos can re-save an opened JPG as a PNG without any extra software.
• Batch utilities. IrfanView and XnConvert are built for converting entire folders at once and are common choices among people processing large photo libraries.
• Command line. ImageMagick handles this in one line — magick input.jpg output.png — which is the practical option for scripting a conversion step into a larger automated pipeline.
• The API. This same conversion is available as a metered API endpoint for developers who need to convert JPG to PNG as part of an application or automated workflow rather than through a browser. Details on the request format and credit cost are in the API docs.

Does converting JPG to PNG improve image quality?

No. It stops further quality loss from happening on future saves, but it can't restore detail the JPG already discarded during its original lossy compression. The visual result will look identical to the source JPG, just stored differently.

Will my JPG to PNG conversion add a transparent background?

No. JPG files never contain transparency data, so there's nothing for the conversion to carry over — the resulting PNG will be fully opaque. Adding real transparency requires a background-removal step, which is a different kind of tool entirely.

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

PNG's lossless compression simply can't compress photographic detail as efficiently as JPG's lossy compression does. For a typical photo, expect the PNG to be noticeably larger — this is normal and expected, not a sign of a problem with the conversion.

Should I convert all my JPG photos to PNG for archiving?

Generally not necessary. If a JPG was already saved at a low quality setting, converting it to PNG locks in that existing quality without improving it, while multiplying the storage size. PNG conversion is more useful as a preparation step for further lossless editing than as a blanket archival strategy.

Can I batch convert many JPG files to PNG at once?

Yes, up to 20 files in a single batch, with a ZIP download available so you don't have to save each converted PNG individually.

Does JPG to PNG conversion work on mobile devices?

Yes, the converter is fully responsive and works the same way on phones and tablets as it does on desktop — upload, convert, and download all work through the same touch-friendly interface.

Related Conversions

Going the other direction? The PNG to JPG converter shrinks a PNG for the web. Want something smaller than PNG that still keeps transparency? The PNG to WebP converter is built for that case. Beyond format, the image compressor cuts file size without touching the encoding, and the image resizer adjusts pixel dimensions whenever the format itself isn't the issue.