🖼️ PNG to JPG Converter

Convert PNG to JPG in your browser, choosing the color that replaces transparency instead of getting a black box. Batch, size comparison, nothing uploaded.

✓ Free✓ No Signup Required✓ Browser-Based

🔄

Choose images, or drop them here

PNG in, JPG out. Converted in this tab — the file is never uploaded.

Background behind transparency

JPG cannot store transparency, so transparent areas are filled with this color. Left unfilled they would come out black.

Quality: 90

Settings apply to the next file you add. 90 is visually lossless for almost any photograph.

What PNG to JPG Converter Does

PNG to JPG is the conversion people make to save space, and the one that most often produces a result they did not expect. The reason is a single missing feature: JPEG has no alpha channel. It stores color and nothing else, so every transparent pixel in your PNG has to become an opaque one, and the converter decides what color.

A converter that skips that decision draws your image onto a fresh canvas — which starts out transparent black — and asks the JPEG encoder to save it. The encoder discards the alpha and keeps the color underneath, and the color underneath is black. That is why logos come back in a black box. This tool paints the background first, and lets you pick it.

The saving is real when the source is photographic: a photo stored as PNG typically comes out five to ten times smaller as JPG, with no difference visible at quality 90. But the saving reverses for flat artwork. PNG compresses large uniform areas extremely well and JPG does not, so a screenshot or a logo can end up larger as a JPG, and blurrier, because JPEG scatters faint halos around the sharp edges that text and line art are made of.

The conversion is one-way. JPG is lossy, so detail is discarded permanently the first time and cannot be recovered by converting back. If the image is still being edited, keep the PNG.

How to Use PNG to JPG Converter

Set the color that should replace transparency — white unless the image will sit on something else
Set the JPG quality; 90 is visually lossless for a photograph
Add your PNG files, or drop them onto the box
Check the size comparison and save

When PNG to JPG helps, and when it hurts

Source image	Result as JPG	Recommended
Photograph saved as PNG	Typically 5–10× smaller, no visible difference at q90	Yes
Scanned document	Much smaller; text edges soften slightly	Yes, at q85 or above
Screenshot with text	Often larger, and visibly haloed around characters	No — keep PNG
Logo with transparency	Transparency destroyed; edges softened	No — keep PNG, or use WebP
Line art, charts, diagrams	Larger and blurrier	No — keep PNG

What the matte color should be

The transparency has to become something. Choose it deliberately rather than accepting a default.

Where the image will appear	Set the matte to
A white page or document	#ffffff
A dark website header	The exact header color, or keep PNG
Printed on paper	#ffffff
Unknown or several backgrounds	Do not convert — keep the alpha channel, in PNG or WebP

How to Read Your Result

Quality 90 is the sensible default

At 90 the loss is invisible on a photograph while the file is a fraction of the PNG. Going to 100 roughly doubles the size for differences that are not perceptible. Going below 75 starts showing blocking in skies and gradients.

The size column is a sanity check

If the JPG comes out larger than the PNG, the source was flat-color artwork and this is the wrong conversion. That is information worth acting on, not a rounding error.

Do not round-trip

JPG → PNG → JPG loses twice and gains nothing. Once an image is a JPG, keep it as a JPG unless you are moving it into an editor.

Limitations & Accuracy Notes

Transparency is flattened permanently. There is no way to recover it from the JPG afterwards.
Animated PNG (APNG) is converted from its first frame only.
A 16-bit-per-channel PNG is reduced to 8 bits, because that is what the canvas and JPEG both work in.
Embedded color profiles are not carried across; the output is treated as sRGB.
EXIF and any text chunks in the PNG are not preserved.

Frequently Asked Questions

Why does my PNG turn black when converted to JPG?

Because JPG has no alpha channel. The transparent pixels have to become some color, and the default state of the canvas they are drawn onto is transparent black — so a converter that does not paint a background first hands you a logo in a black box. This tool paints the background before drawing, and lets you choose the color.

How much smaller will the JPG be?

For a photograph saved as PNG, usually five to ten times smaller. For a screenshot, a logo or line art, sometimes larger — PNG compresses flat color extremely well and JPG does not, and JPG will also blur the sharp edges of text. Each row shows the actual before and after, so you can see rather than guess.

Does converting PNG to JPG lose quality?

Yes, once. JPG is lossy, so this first conversion discards detail permanently and there is no way back. At quality 90 the loss is invisible for a photograph. What matters more is not repeating it: every re-save of a JPG loses a little more, so keep the PNG if the image is still being edited.

Can I convert a folder of PNGs at once?

Yes. Select or drop as many as you like; they all use the same background color and quality, and "save all" downloads them in sequence with a short gap so the browser does not block them.

Should I convert a logo from PNG to JPG?

Usually not. A logo needs its transparent background to sit on any color, and JPG destroys that permanently while also softening the crisp edges it depends on. Keep PNG, or use WebP if the file size is the problem — it keeps transparency and is substantially smaller.

Why convert a PNG to JPEG at all?

File size. For photographic content PNG stores every pixel losslessly and produces files several times larger than an equivalent-looking JPEG. Where the image is a photograph and size matters, JPEG is the correct format.

What happens to the transparent background?

It is filled with a solid color, because JPEG has no alpha channel. A logo with a transparent background will come back on a white or black rectangle, which is usually not what people expect.

Will it look worse?

JPEG is lossy, so some information is discarded. On photographs at a reasonable quality setting the difference is hard to see. On screenshots, text and flat-color graphics the artefacts around sharp edges are obvious, and PNG is the better choice for those.

Can I convert back afterwards?

You can produce a PNG from the JPEG, but the discarded detail does not return. Keep your original PNG if there is any chance you will need it.

Is my image uploaded?

No. The conversion happens in your browser.

Which quality setting should I use?

Start high and reduce until the file size is acceptable or artefacts become visible. There is no universal correct value — it depends on the image content and where it will be displayed.

References & Further Reading

MDN — Image file type and format guide — Confirms JPEG has no alpha channel and PNG does
ITU-T T.81 — the JPEG specification
MDN — HTMLCanvasElement.toBlob()

By OnlineToolHubs Team • Updated September 2026