ImgSquash

PNG to JPG Converter

PNG is lossless and supports transparency, but files are often far larger than needed. Converting to JPEG gives you small files that open everywhere — every browser, phone, editor and printer. Lossless compression works by finding repetition, and photographs have very little. A photo saved as PNG is routinely five to ten times the size of the same photo as a good-quality JPEG with no visible difference — which is the single most common cause of a slow-loading page. Photographs headed somewhere you do not control: an email attachment, a form upload, a print order, a document, or anyone else's computer. Drop your files below and the conversion runs here, in this tab, through the Canvas API — nothing is uploaded, so there is no size cap, no watermark and no sign-up. Pick a quality level before you convert: 80% is the usual sweet spot, and dropping below about 60% starts to show around hard edges and in flat areas of sky.

Drop images here

or click to browse — JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, SVG

Private: files never leave your device

What a PNG file actually is

PNG arrived in 1996 as a patent-free replacement for GIF and compresses with DEFLATE — the same algorithm as ZIP. Nothing is discarded, so a PNG decodes to exactly the pixels that went in, and it carries a full 8-bit alpha channel rather than GIF's single transparent colour.

Screenshots on every operating system default to PNG, as do exports from design tools and most logo and icon assets. Anything with crisp edges, flat colour or a transparent background has probably been living as a PNG.

What you get from JPG

Saving as JPEG re-encodes the image with lossy DCT compression at a quality level you choose. Around 80% is the usual sweet spot: files shrink dramatically and the difference is invisible at normal viewing sizes.

Nothing in mainstream computing fails to open a JPEG. Thirty-year-old software, print shops, hospital systems, government upload forms, every phone and every browser — if a system takes images at all, it takes JPG.

What changes when you convert PNG to JPG

This is where the file size actually drops. A PNG stores its image without discarding anything; JPEG works in 8×8 blocks and throws away the fine detail inside each one, then usually halves the colour resolution as well through chroma subsampling. Photographs take that treatment invisibly. Flat colour, text and sharp edges do not — they are where the block boundaries and coloured fringing show up, so keep the quality high if the image contains any.

Transparency is the thing to watch. PNG can store transparent areas and JPG cannot, so anything see-through is composited onto a white background during conversion. A logo with soft edges will show a white fringe when placed on a coloured background afterwards. If the transparency matters, convert to PNG or WebP instead.

Frequently asked questions

Is this PNG to JPG converter really free and private?

Yes. Conversion happens entirely in your browser using the Canvas API — your PNG graphics are never uploaded to a server, there is no file limit, no watermark and no sign-up.

Can I convert multiple PNG files at once?

Yes — drop any number of files and they convert in one batch. Use "Download all" to save the results as a single ZIP.

What happens to transparency when converting PNG to JPG?

JPEG does not support transparency, so transparent areas are composited onto a white background. If you need transparency preserved, convert to PNG or WebP instead.

Does converting PNG to JPG lose quality?

This is where the file size actually drops. A PNG stores its image without discarding anything; JPEG works in 8×8 blocks and throws away the fine detail inside each one, then usually halves the colour resolution as well through chroma subsampling. Photographs take that treatment invisibly. Flat colour, text and sharp edges do not — they are where the block boundaries and coloured fringing show up, so keep the quality high if the image contains any.

What quality setting should I use for the JPG?

Around 80% suits almost everything. Below about 60% the block artifacts become visible on flat areas and around hard edges; above 90% the file grows quickly for a difference nobody sees. If the image contains text or a logo, err higher — lossy compression treats sharp edges worst.

Is it worth converting my screenshots away from PNG?

Usually not. Screenshots are exactly what PNG is good at — flat colour, sharp text, few gradients — so they compress well losslessly and JPEG would smear the text. Convert photographs out of PNG, not interface captures.

Related conversions

PNG → WebPPNG → ICOWebP → JPGHEIC → JPGAVIF → JPGGIF → JPG

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