This converter uses the PNG encoder built into your browser's Canvas API. It creates one full-color PNG from one JPG or JPEG without resizing or cropping it. The comparison shows both file sizes because PNG often needs more storage for photographs, even though it avoids adding new lossy compression when you save the converted file again.
Private browser utility / Images
Free JPG to PNG Converter
Runs entirely in your browser - no upload, no sign-up.
Your JPG is converted locally and never uploaded.
How does a JPG to PNG converter work?
A JPG to PNG converter decodes a JPEG image and saves those pixels in the lossless PNG format. This browser tool keeps the image's displayed width, height, and orientation, then shows the output beside the original. The conversion happens on your device, so the file is never uploaded.
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How to use
- 01Choose a JPG
Drop a .jpg or .jpeg file into the converter, select it from your device, or load the built-in example.
- 02Convert the image
Select Convert to PNG. The browser decodes the JPG and writes a lossless PNG with the same displayed dimensions.
- 03Check the result
Compare the original and converted previews, file sizes, and pixel dimensions before saving anything.
- 04Download or copy
Download the PNG with a clear filename, or copy the PNG image directly into a compatible app.
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Who it's for
- Designers and editors can move a JPEG into a PNG-only workflow before adding transparency, layers, labels, or repeated edits.
- Developers can prepare JPG assets for software, upload forms, test fixtures, and pipelines that specifically require PNG files.
- Teachers and office teams can convert screenshots, scans, and document images without installing another app.
- Privacy-conscious users can change the image format without sending personal photos or client artwork to a conversion server.
FAQ
Is my JPG uploaded during conversion?
No. Your browser reads the JPG, draws it to a local Canvas, and creates the PNG on your device. The source and converted images are not sent to a processing server. You can use the converter without an account or file upload queue.
Is this JPG to PNG converter free?
Yes. You can convert, preview, copy, and download a PNG without a subscription, watermark, or sign-up. The tool accepts one image at a time and has safety limits of 50 MB, 50 megapixels, and 16,384 pixels on either side.
How many JPG files can I convert?
You can convert one JPG at a time and repeat the process as often as needed. There is no daily quota. The one-file workflow keeps memory use predictable and lets you inspect each PNG before downloading it.
Does converting JPG to PNG improve image quality?
No. PNG prevents another lossy encoding step, but it cannot recover pixels or detail already removed when the JPEG was created. Compression artifacts in the JPG remain visible in the PNG. The main benefit is lossless storage for later edits or PNG-only compatibility.
Will the PNG be larger than the JPG?
Often, especially for photographs. JPEG compresses gradual color changes efficiently by discarding some detail, while PNG stores the decoded pixels losslessly. Flat graphics may behave differently, so this converter reports the exact original and output sizes instead of promising a smaller file.
Does the PNG get a transparent background?
No. A normal JPEG has no transparency channel, so converting it to PNG does not automatically remove its background. The output PNG is opaque. Use a background removal tool if you need to isolate a subject and create transparent pixels.
Will the PNG keep the same dimensions and orientation?
Yes. The converter preserves the JPG's displayed pixel width, height, and browser-decoded orientation. It does not resize or crop the image. Metadata such as EXIF camera details and GPS information is not copied into the Canvas-generated PNG.