PNG to JPG converter: smaller files that open anywhere
Turn PNG images into JPG so they upload to forms, print correctly and take a fraction of the space. Batch convert as many as you have, in your own browser, with nothing sent to a server.
Drop images here, or choose files
JPG, PNG, WebP, HEIC, GIF, BMP, AVIF. Up to 50 files at a time. Nothing is uploaded.
Files never leave your device. Check the network tab if you like.
Why a PNG photo is often the wrong file
PNG is a lossless format built for graphics: it stores every pixel exactly, which is perfect for a logo or a screenshot with sharp text but wasteful for a photograph, where neighbouring pixels blend smoothly and there is nothing crisp to preserve. A photo saved as PNG can easily be four or five times larger than the same photo saved as JPG at a quality that looks identical on screen, because JPG's compression is built specifically for that kind of smooth, photographic detail.
Screenshots are the most common accidental PNG: Windows' Snipping Tool and macOS screenshots both save PNG by default even when the picture behind them is a photo, so a screenshot of a photo inherits the wrong format twice over.
What happens to a transparent background
JPG has no transparency channel, so any transparent or semi-transparent area in the PNG is filled solid white before the photo is saved. This is fine for photos, which rarely have transparency, but it matters for a logo or a graphic with a see-through background: check the result before using it somewhere the background colour is not white, and keep the PNG if transparency has to survive.
More broadly, a logo, an icon set, a chart with thin lines, or anything that needs to sit on more than one background colour is usually better left as PNG or converted to WebP instead, which supports transparency and compresses more efficiently than PNG while staying lossless enough for flat graphics. Converting a diagram or a chart to JPG can introduce faint colour fringing around thin lines and text, which is more noticeable when the image is later zoomed in or printed large. The rule of thumb is simple: if the PNG contains a photograph or a photo-realistic scene, JPG is almost always a clear improvement; if it contains vector-style graphics, transparency, or text meant to stay crisp at any size, keep it as is.
Set the quality high: this is a first, real loss
Because a PNG has never been compressed with quality loss before, converting it to JPG is the first time any detail is actually thrown away, unlike converting a JPG that has already been compressed once. Keep quality around 90 for anything with fine text or hard edges, where JPG's compression can create a faint halo or blockiness around the edge. Photographic PNGs are more forgiving and hold up fine down to 75–80.
| Source PNG | Recommended quality | Why |
|---|---|---|
| Photograph, scanned photo | 80–88 | Smooth gradients hide compression well |
| Screenshot with text | 90–95 | Low quality blurs and haloes text edges |
| Logo or icon, no transparency needed | 92–98 | Flat colours show blockiness first |
How much space you actually get back
The saving is easiest to see with real numbers. A 12-megapixel phone photo screenshotted or exported as PNG commonly lands between 8 and 15 MB. The same picture saved as JPG at quality 90 typically comes out at 1.5–3 MB, and at quality 80 often falls under 1 MB, all without any visible loss on a phone or laptop screen. A simple graphic, like a screenshot of a document with mostly white background and black text, compresses even further as PNG already handles flat colour reasonably well, so the JPG saving there is smaller in percentage terms even though the absolute file is tiny either way.
Where JPG-only rules show up
Many government portals, exam registration sites and older content management systems accept only .jpg or .jpeg and reject .png outright, sometimes with a generic 'invalid file type' error that does not say why. Email attachments, printing services and stock photo submissions are similarly JPG-first. Keeping a JPG copy alongside your PNG originals avoids repeating the same upload failure on every form that has this restriction.
The error message rarely explains any of this, which is what makes it frustrating rather than merely inconvenient: a form that says only 'upload failed' gives no hint that the fix is as simple as changing the file extension and format. Converting to JPG ahead of time, before the first attempt, saves the trial-and-error most people go through the first time they hit one of these forms.
Batch conversion and common mistakes
Drop in a whole folder of PNGs and convert them all at the same quality in one pass, then download everything as a ZIP. The one mistake worth avoiding is converting the same file back and forth between PNG and JPG repeatedly during editing: each JPG save adds a little compression damage, so if you need to keep editing, work from the original PNG and only export to JPG once, at the end.
A second common mistake is converting at the original pixel size when the destination only needs a small preview, such as a thumbnail or a profile picture. Resizing the longest side down to a few hundred pixels before choosing JPG shrinks the file far more than quality alone ever will, and it is worth doing both together rather than relying on quality settings to do all the work.
Frequently asked questions
- Why is my PNG so much bigger than a JPG of the same photo?
- PNG is lossless and stores every pixel exactly, which suits graphics but not photographs. JPG's compression is designed for smooth photographic detail, so it can shrink the same photo far more.
- Does converting PNG to JPG lose quality?
- Yes, a small amount, since it is the first lossy compression the image has gone through. At quality 85 or higher the loss is not visible on screen for photographs.
- What happens to a transparent background?
- It becomes solid white, since JPG has no transparency. If you need to keep a see-through background, keep the file as PNG or convert to WebP instead.
- Why do some forms reject PNG files?
- Many older upload systems and government portals only whitelist .jpg or .jpeg. Converting first avoids a rejected upload.
- Can I convert several PNG files at once?
- Yes, up to 50 files per batch. Every file uses the same quality setting and downloads individually or as one ZIP.
Content last reviewed: 2026-09-03