PNG to JPG Converter

The quality setting controls how aggressively JPG compression discards detail. It is not a percentage of anything meaningful, so it is worth knowing roughly what the numbers do:

• 95–100 — Nearly indistinguishable from the original, but the files get large quickly and the gains over 90 are usually invisible. Worth it for images you intend to edit further.
• 85–94 — The useful range for almost everything. 90 is a sensible default and is what this tool starts on.
• 70–84 — Visibly smaller files. Fine for photographs on a web page; starts to look soft on text and diagrams.
• Below 70 — Use when file size genuinely matters more than appearance. Blocky artefacts around edges become obvious.

One thing to keep in mind: JPG compression is not reversible. Converting a PNG to JPG and then back to PNG does not restore the original — you get a lossless copy of the already-degraded image, at a larger file size than the JPG. If the PNG is your only copy of something important, keep it.

Re-saving a JPG repeatedly compounds the damage, a little more each time. If you plan several rounds of editing, do the editing first and convert to JPG last.

When converting PNG to JPG is the right call

The usual reason is size. A screenshot-heavy document, a folder of exported designs, or a camera roll saved as PNG can be surprisingly large, and JPG will often cut that by 80–90% with no difference most people can see — provided the images are photographic.

Other common reasons:

• Upload limits. Job portals, government forms and older content systems frequently cap uploads at 1–2 MB, and a fair number accept JPG only.
• Email attachments. A handful of PNGs can exceed a mailbox limit that the same images as JPG would sit comfortably under.
• Compatibility. Almost nothing rejects JPG. Some older photo frames, printers and embedded devices still handle PNG unreliably.
• Web performance. Photographs served as PNG are one of the most common causes of a slow-loading page.

When you should keep the PNG

Converting is the wrong move if the image has transparency you actually need — a logo meant to sit on different coloured backgrounds, for example. Once it is a JPG, that transparency is gone permanently and baked into whichever colour you chose.

It is also the wrong move for screenshots containing text, UI mockups, charts, diagrams and pixel art. These are exactly the images JPG handles worst: the compression blurs precisely the hard edges that make them readable. If you need a smaller file for one of those, try converting to WebP instead, which is lossless-capable, keeps transparency, and is usually much smaller than PNG.

What happens to transparent areas

Because JPG has no alpha channel, every transparent or semi-transparent pixel must be composited onto a solid colour before encoding. This tool defaults to white, which is right most of the time because most pages and documents are white.

If your image is destined for a dark background, choose a matching colour before converting — otherwise you will get a white rectangle around your subject. Semi-transparent pixels, such as a soft drop shadow, blend proportionally with whatever colour you pick, so a shadow that looked natural on white can look like a grey halo on black.