Convert JPG to PNG Joint Photographic Experts Group ↔ Portable Network Graphics Free Online Secure
The picture is redrawn once at its original size and saved as PNG. Nothing is resized, and the file never leaves your device.
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Drop a JPG here, or choose one.
Your file never leaves this device. Everything runs in your browser.
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Where these formats come from
Each of these formats was written to solve a different problem. JPEG arrived in 1992 from the Joint Photographic Experts Group and was built for photographs: it discards the detail the eye is least likely to miss, which is why a photo shrinks enormously and why text in a JPEG looks smudged. PNG was written in a hurry in 1996, after the company holding the patent behind GIF began charging for it; it is lossless and has real transparency, which is why logos and screenshots belong in it. WebP came from Google in 2010 and does both jobs, typically a quarter smaller than either. BMP is Microsoft's plain format with no compression at all, and HEIC, Apple's default since 2017, borrows video compression to store a still at about half the size of a JPEG.
Where you meet them
Photographs travel as JPEG or, straight off a recent iPhone, as HEIC. Anything with sharp edges — screenshots, logos, diagrams, text, anything needing a transparent background — belongs in PNG, where JPEG would blur the edges. WebP is what a modern website serves to save bandwidth. BMP survives mostly inside Windows software and in places where a program wants pixels with no decoding at all.
Questions people ask
Should I save this as PNG or JPEG?
Look at the edges. A photograph has no hard edges, so JPEG's way of discarding detail is invisible and the file ends up a fraction of the size. A screenshot, a logo, a chart or anything with text has hard edges, and JPEG leaves a visible halo around every one of them — that is where PNG belongs, even though the file is larger. If the image needs a transparent background, PNG is the only choice of the two.
Why will nothing open my HEIC photos?
Because HEIC is newer than most of the software people have. It has been the iPhone default since 2017, but Windows needs an add-on to show it, many Android phones will not, and a great deal of web software still rejects it outright. Converting to JPEG is the usual answer: the photograph is unchanged to the eye, the file is roughly twice the size, and everything made in the last thirty years can open it.
Does the file lose quality?
It depends on what the two formats can hold. Converting between formats that store the same thing — a PNG to a BMP, a WAV to a FLAC — loses nothing. Converting into a format that throws information away to save space, such as JPEG or MP3, loses a little every time, and converting back does not bring it back. Where a choice exists, this page errs towards keeping the original quality rather than making the smallest file.
Is my file uploaded anywhere?
No. The conversion happens inside your browser, on your own machine; the file never leaves it and there is no server here that could receive it. That is why a large file is limited by your own memory rather than by an upload, and why nothing you convert can appear in anybody's logs — including ours. The audio and video tools do fetch their conversion engine from this site the first time you use them, some thirty megabytes once; after that the work still happens entirely on your machine.
Why people convert JPG to PNG
JPG and PNG are the two image formats most people meet every day, and they do different jobs. JPG is built for photographs: it squeezes a picture into a small file by quietly discarding detail the eye is unlikely to miss. PNG is built for exactness: it keeps every pixel as it is and can carry transparency. People convert JPG to PNG for a handful of practical reasons. A program or website insists on PNG. They want to edit a picture without it losing a little quality at every save. They need a format that is accepted by a design tool, a game engine or a print service. Or they simply want a stable copy that will not degrade the next time it is opened and saved.
It helps to know from the start what the conversion can and cannot do, because there is a common misunderstanding. Converting JPG to PNG does not make a picture better. It does not sharpen it, remove the blur or bring back detail that the JPG already threw away. What it does is stop any further loss: from this point on, the picture is stored without discarding anything, so you can open it, edit it and save it again as often as you like without the quality sliding.
This page converts JPG to PNG in your browser. Your picture never leaves your device, which matters for photographs of people, documents and anything private. Below you will find exactly how the conversion treats your picture, why the result is usually a bigger file, and when it is and is not the right move.
What the conversion keeps
Every pixel and the exact dimensions
When you convert JPG to PNG here, every pixel of the image is kept, and the exact dimensions stay the same. The picture is redrawn once at its original size and saved as a PNG. Nothing is resized, cropped or stretched. A photograph of 4000 by 3000 pixels is still 4000 by 3000 pixels afterwards, and every dot has the colour it had.
The resolution the file records
A picture file also records a resolution, the dots per inch it was meant to print at. That note is carried over, so a scan or photo that was meant to print at a certain physical size still does so. This matters most for scanned documents, where the physical size is part of the meaning.
What "redrawn once" means
The converter opens your JPG, reads its pixels and writes them out in PNG form. That single pass is the only step. Because PNG is lossless, nothing is lost in writing, and because the size is not changed, nothing is resampled. The result is a faithful copy of what the JPG showed, in a different container.
What the conversion cannot do
PNG cannot undo JPEG
This is the point that surprises people. A JPG has already lost detail when it was first saved, and that loss is permanent. Converting to PNG does not reverse it. The blur and the blocky patches that JPEG leaves around edges and in smooth areas are copied faithfully into the PNG, because they are now part of the picture. A PNG made from a heavily compressed JPG looks exactly as bad as the JPG did, no better and no worse.
Think of it as photocopying a photocopy into a better folder: the folder is better, the picture is the same. If you hoped the conversion would clean up a poor image, it will not. For that you need a different tool, such as an editor with noise reduction, and even that can only guess at what was lost.
The file usually gets bigger
Because PNG stores every pixel without discarding anything, the file is usually larger than the JPG you started with, sometimes several times larger. A photograph that was two megabytes as a JPG might be eight as a PNG. That is the price of exactness, and it is why PNG is a poor choice for photographs you simply want to share or store. If size matters more than anything else, stay with JPG, or even consider a modern format such as WebP.
Why photographs make large PNGs
PNG compresses by finding repetition: runs of identical pixels, flat colours, repeating patterns. Photographs have almost none, because every pixel differs slightly from its neighbours. So PNG has little to pack, and the file stays large. Drawings, screenshots and logos have plenty of repetition, which is why they make small PNGs and photographs do not.
When it makes sense to convert JPG to PNG
Editing without further loss
If you are going to open a picture, change it and save it several times, working in PNG avoids a little more loss at every save. Each time a JPG is saved again, it discards a bit more. A PNG does not. If you plan a long editing session, convert JPG to PNG first, do your work in PNG, and export a JPG only at the very end for sharing.
Programs that need PNG
Some software accepts only PNG: certain design tools, game engines, templates and web services. Converting lets you use your picture there. It also helps when you need to add transparency later, since PNG can carry it and JPG cannot.
Screenshots and graphics saved as JPG by mistake
Screenshots and logos saved as JPG show a fuzz around text and edges. The converter cannot remove that fuzz, but it stops it getting worse, and PNG is the right home for such images from now on. If you still have the original screenshot, use that instead.
What JPG and PNG each are
JPG, also written JPEG, is the format of almost every photograph. It stores a picture as a grid of coloured dots and keeps the file small by discarding detail the eye is unlikely to miss. That is why JPGs are light, and why they are called lossy: some information is thrown away for good the moment the picture is saved, and a little more every time it is saved again.
PNG, short for Portable Network Graphics, stores the same kind of grid but discards nothing. It looks for repetition and packs it, so the picture you open is bit for bit the picture that was saved. It can also carry transparency. The cost is size, particularly for photographs, whose subtle variation leaves little to pack. When you convert JPG to PNG, you move a picture from the first world into the second, keeping the content it has and stopping any more loss.
The "generation loss" problem
Every time a JPG is opened, edited and saved, it loses a little more. After many rounds the damage shows as blotches, colour banding and a smeared look. People call this generation loss, like copying a tape of a tape. PNG does not suffer from it. That is the single best reason to convert JPG to PNG before you start editing: from then on, you can save as often as you wish without the picture decaying.
Editing workflow: work in PNG, finish in JPG
A good habit for anyone who retouches pictures is to separate the working copy from the delivery copy. Start from your JPG original and convert JPG to PNG. Do all your editing, such as cropping, colour correction and retouching, on the PNG, saving as often as you like. When you are done, export a JPG for the web or for email, and do that only once. The delivery JPG loses a little in that single export, but the working copy never degraded along the way.
Keep the original JPG untouched as well. It is the closest thing you have to the photograph as the camera made it, and if you ever want to start the edit again, you can convert JPG to PNG once more from the same source.
If you only crop or resize
For a single simple change, there is little point in the detour: one extra save costs very little. The workflow pays off when there are many changes. As a rule of thumb, if you will save the picture three or more times, work in PNG.
Transparency, and why a JPG has none
JPG has no concept of transparency: every pixel is a solid colour. PNG can store transparent and semi-transparent pixels, which is how logos and cut-out graphics sit neatly on any background. When you convert JPG to PNG, you get a picture whose pixels are all solid, because that is what the JPG held. The format now allows transparency, but nothing is transparent yet.
If what you really want is a cut-out version of your picture, for example a product with its background removed, you need an editor to erase the background after the conversion. PNG is the right container for the result, and starting from a PNG means the erased areas can be saved as transparent without anything else being disturbed. In that sense, converting JPG to PNG is the first step of the job, not the whole of it.
White backgrounds that stay white
A JPG of a logo on a white background will convert to a PNG with a white background, not a transparent one. If you place it over a coloured page, you will see a white rectangle. Remove the white in an editor if you need the logo to float freely.
When not to convert JPG to PNG
If you only want to send or store a photograph, leave it as a JPG. Converting will make it larger without making it better. If you need a smaller file, go the other way: compress the JPG or convert JPG to WebP. And if you are hoping for a cleaner picture, remember that PNG cannot undo JPEG.
How to convert JPG to PNG here
Add your picture
Drop the JPG onto the page or pick it from your device. It is read inside your browser and is not uploaded.
Convert
Press the button. The picture is redrawn once at its original size and saved as a PNG. For an ordinary photograph this takes a moment.
Download and check
Download the PNG and open it. Check the dimensions are as expected and that it looks the same as the JPG. Notice the file size: it is normal for it to be larger.
Questions people ask before converting
Will the quality improve?
No. PNG cannot undo JPEG. The blur and blocking already in the photo are copied faithfully. The conversion only prevents further loss.
Why is the PNG bigger than my JPG?
Because PNG keeps every pixel without discarding detail, and photographs have little repetition for it to pack. A larger file is normal.
Is my picture uploaded?
No. Everything runs in your browser and the picture never leaves your device.
Can I get transparency?
The result has the same pixels as your JPG, which has no transparency. The PNG format can carry it, so you can add it later in an editor.
Who converts JPG to PNG
Designers and editors
People who work on pictures in several rounds use PNG as a safe working format, exporting JPG only at the end.
Users of strict software
Game developers, template makers and website builders often need PNG, and converting gets a photograph into their tools.
Anyone archiving a stable copy
PNG does not degrade with repeated opening and saving, so it is a sensible format for a copy you may touch again.
Common mistakes
Expecting a cleaner picture
PNG cannot remove blur or blocking that is already there.
Converting photographs just to share them
The file gets larger for no benefit. Keep the JPG.
Deleting the original
Keep the JPG if it is your only copy of the picture, in case you need it in that format later.
Related tools
To go the other way, convert PNG to JPG. For smaller files, compress JPG, compress PNG or try JPG to WebP. To put pictures in a document, use JPG to PDF, to turn a flat-colour image into a scalable drawing, JPG to SVG, and to label a picture, add a watermark to PNG. If an iPhone photo is HEIC, convert it to JPG first.
Storage, speed and large pictures
Because PNG files are larger, think about space before you convert JPG to PNG in bulk. A folder of a hundred photographs at two megabytes each takes two hundred megabytes as JPG and could take close to a gigabyte as PNG. If you only need PNG for a few pictures you are going to edit, convert those, not the whole folder.
Everything runs on your own device, so large pictures depend on its memory. A twelve-megapixel photograph is no trouble for a modern phone or computer. A very large panorama may be slow on an older device. If a big picture struggles, give the browser a moment and avoid switching to other apps while it works.
Reducing the size afterwards
If the PNG turns out too big for where it has to go, you can reduce it: compress the PNG lowers the resolution, and, for photographs, converting back to JPG at the end gives a much lighter file. The pattern is the same: convert JPG to PNG for the working stage, and choose the smallest sensible format for delivery.
Checking the result properly
After you convert JPG to PNG, open both files side by side at the same zoom and compare. They should look identical. Check the pixel dimensions in the file properties; they should match. If everything matches, you have a faithful PNG copy, and any editing you do from here will not wear it down.
Your picture stays on your device
The conversion happens locally. Your picture is read by your own browser, written as a PNG there and handed back. Nothing is uploaded, so there is no copy on a server and no one else who could see it. For photographs of people and private documents, that is the safe way to convert JPG to PNG.
A worked example
Say you have a product photograph saved as a JPG of 2000 by 2000 pixels and 600 kilobytes, and you want to retouch it in several steps. You drop it here and convert it. You download a PNG of 2000 by 2000 pixels and about 4 megabytes. It looks identical to the JPG, including its small imperfections. You do your editing in PNG, and when you are finished you export a JPG for the website. At no point during editing did the picture lose further quality.
Before you close the page
Check that you downloaded the PNG, that the dimensions are right, and that you understand the file is larger. Keep the original JPG.
Summary
To convert JPG to PNG here, drop the picture and press the button. Every pixel, the exact dimensions and the recorded resolution are kept. PNG cannot undo JPEG: the blur and blocking already in the photo are copied faithfully, and the result is usually a larger file. The conversion stops further loss; it does not improve the picture. Nothing leaves your device.