Why convert JPG to PNG?
JPG is the world's photo format because it is small. It gets small by throwing data away: JPEG compression divides your image into 8×8 pixel blocks, transforms them into frequency data, and then quantizes that data — permanently discarding the detail it judges least visible. At high quality settings the loss is hard to see, but it is real, and it is irreversible. Every time you edit a JPG and save it again, the image is re-encoded and a little more detail is discarded. This is generation loss: the first save looks fine, the fifth save looks slightly smeared around text and hard edges, and the tenth save looks visibly worse.
PNG works the opposite way. It uses lossless DEFLATE compression, which stores every pixel exactly — re-save a PNG a hundred times and the pixels are byte-identical to the first save. That is the entire reason to convert: you are not improving the image, you are freezing it. Conversion takes whatever the JPG decodes to right now, artifacts included, and locks it in so that all future edits start from a stable master instead of a degrading copy. If you plan to crop, recolor, annotate, or layer an image more than once, converting to PNG before you start editing is the single highest-value step in the workflow.
How much bigger will the PNG be?
Larger, usually — but how much larger depends entirely on what is in the picture. Photographs with smooth gradients and complex texture compress terribly as PNG, because lossless compression cannot discard the noise-like detail that JPG quantization throws away. Screenshots, logos, and graphics with flat colors compress beautifully, because large areas of identical pixels cost almost nothing to store. Typical examples:
| Image type | Original JPG | Converted PNG | Why |
|---|---|---|---|
| Smartphone photo (4000×3000) | 3.0 MB | ~15 MB | Photos compress poorly as PNG, typically 4–6× larger |
| Blog header graphic (2000×1200) | 2.0 MB | ~4 MB | Flat colors and gradients compress well |
| Screenshot (1920×1080) | 350 KB | ~500 KB | Text and UI elements stay crisp at modest size |
| Logo with flat colors (1200×1200) | 200 KB | ~120 KB | PNG can be smaller than JPG for flat graphics |
These are typical examples — actual sizes vary with image content and the original JPG's quality setting. You do not have to trust the table: the converter shows the real before-and-after size on every card, so you can see the exact result for your own files before you download anything.
Does converting JPG to PNG add transparency?
No, and this is the most common misconception about this conversion. A JPG has no alpha channel. There is no such thing as an empty or see-through pixel in a JPG — every pixel has a color, and a white background is simply a large area of white pixels. Converting to PNG wraps those exact same pixels in a new container. The PNG format can carry transparency, but conversion alone does not create any: your converted PNG will have the same solid white background as the original JPG.
Getting a genuinely transparent image is a separate, three-step job. First, convert to PNG, which gives you a lossless file that will not degrade while you work on it. Second, open the PNG in an editor such as Photoshop, GIMP, or Photopea and remove the background — by selection, masking, or a background-removal tool — so the background pixels become transparent alpha instead of white. Third, save as PNG again, because PNG is what preserves that alpha channel; saving back to JPG would flatten transparency onto white. Any tool that promises transparency from conversion alone is misleading you. Conversion is step one of transparency work, not the whole job.
The editing round-trip: convert, edit, export
The professional way to use this converter is as the first step of a round-trip, not as a one-way conversion. Step one: convert your JPG to PNG before you touch it, freezing its current quality as your editable master. Step two: do all of your editing in PNG — crops, color corrections, text overlays, layers, repeated saves — with zero additional quality loss, because PNG re-saves are lossless. Step three: when the image is finished, export the final version back to JPG for sharing, using our PNG to JPG Converter or your editor's export function. The JPG is small and universal, which is what you want for the web, social media, and email — while the PNG master stays on your disk for the next round of edits.
This round-trip is also why archiving matters. If a photo is important, the PNG master is the copy to keep: ten years from now it will be pixel-identical to today, while a JPG that has been opened, tweaked, and re-saved a dozen times will not be. And because this converter runs in your browser, your original JPG is never modified — conversion reads it and produces a new file, leaving the original exactly as it was.
When should you keep the JPG?
PNG is not always the right answer, and a page that tells you to convert everything is not being honest with you. Keep the JPG when the photo is only going to be shared, uploaded, or emailed — especially on social platforms, which recompress your upload anyway, so a pristine PNG buys you nothing and costs you a much larger file. Keep the JPG when storage or bandwidth is tight, and when the image is a straight photograph that nobody will edit again.
Convert to PNG when you plan to edit the image more than once, when it contains text, screenshots, diagrams, or logos that must stay sharp, when you are building a lossless archive, when a tool, form, or platform strictly requires PNG, or when you are starting transparency work and need a lossless file to edit in. The rule of thumb is simple: photos live as JPG, working files live as PNG, and you convert at the boundary between the two.
Why PNG and not WebP?
Newer formats like WebP and AVIF compress better than PNG, and for final web delivery they are often the smarter choice. But for an editable master, PNG still wins on universality: every browser, operating system, image editor, and programming library handles PNG natively, with no compatibility questions and no lossy mode to accidentally leave switched on. If your goal is a file you can open anywhere, edit anywhere, and trust to stay identical, PNG is the safe default — and you can always export a WebP or JPG copy from it later.
Three things to know before you convert
JPG, JPEG, and JFIF are the same format. JPG and JPEG are interchangeable extensions for the JPEG standard; JFIF is the most common file wrapper underneath, so almost every JPG you meet is technically a JFIF. This converter accepts all three, and treats them identically.
PNG is RGB-only, so print needs care. PNG cannot store CMYK color, which is the color model print shops use. A CMYK JPG from a print workflow will be decoded to RGB during browser conversion, and colors can shift. If you are preparing images for professional printing, read our image formats for print guide and consider TIFF instead of PNG for the final deliverable.
Your privacy is protected by how conversion works. Because conversion happens in your browser, your files never leave your device — there is no upload, no server copy, and nothing to delete later. The trade-off is that EXIF metadata (camera model, timestamps, GPS location) is stripped from the PNG during canvas conversion. That is good for sharing, but if you need the metadata, keep your original JPG — it is untouched. And if your photo is an iPhone HEIC file rather than a JPG, use our HEIC to PNG Converter instead, which handles that format directly.
How to convert JPG to PNG online
- 01Upload your JPG files
Click Select Files or drag and drop your JPG, JPEG, or JFIF images into the converter. You can queue multiple files at once.
- 02Click Convert
Each image is decoded and re-encoded as a lossless PNG in your browser. Nothing is uploaded to a server.
- 03Download each PNG
Every converted card gets its own green Download .PNG button. Use Save All to download each PNG individually — no zip files.
Frequently asked questions
Does converting JPG to PNG improve quality?
No. Conversion cannot restore detail that JPG compression already discarded. What it does is freeze your image at its current quality: the PNG stores exactly the pixels the JPG decodes to, including any existing artifacts, and then never degrades further no matter how many times you edit and re-save it. Think of it as stopping the damage, not undoing it.
Does converting JPG to PNG add transparency?
No. A JPG has no alpha channel, so every pixel has a color — a white background is white pixels, not empty pixels. Converting to PNG wraps those same pixels in a new container, and the background stays opaque white. To get a genuinely transparent image you must remove the background in an editor such as Photoshop, GIMP, or Photopea after converting, then save as PNG to keep the alpha channel.
Why is the PNG larger than my JPG?
Because PNG is lossless: it stores every pixel exactly instead of discarding data the way JPG does. For photographs the PNG is typically several times larger than the JPG. For screenshots, logos, and graphics with flat colors, the PNG is often about the same size — and sometimes smaller. The converter shows the real before-and-after size on every card, so you can see the exact result for your own files.
Can I just rename a .jpg file to .png instead of converting it?
No. Renaming only changes the label on the file, not the data inside — the file is still JPEG-compressed data wearing a PNG name. Many apps will refuse to open it, and tools that require PNG will still reject it. You have to actually decode the JPG pixels and re-encode them as PNG, which is what this converter does.
Is my EXIF data kept when I convert in the browser?
No, and that is deliberate. This converter runs entirely in your browser using the canvas API, which decodes the image pixels but does not carry EXIF metadata over — so camera model, timestamps, and GPS location are stripped from the PNG for privacy. Your original JPG is never modified or uploaded, so if you need the metadata, keep the original file.
When should I keep the JPG instead of converting to PNG?
Keep the JPG for photographs you only want to share, upload, or email, especially on social platforms that recompress uploads anyway — the smaller file is the whole point of JPG. Convert to PNG when you plan to edit the image again, when it contains text, screenshots, or logos that must stay crisp, when you need a lossless archive master, or when a tool or form requires PNG.