Convert JPG to PNG
Convert a JPG image to PNG without uploading it anywhere.
Finding the best quality that fits…
- Original
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- Result
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- Reduction
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- Dimensions
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How to use this tool
- Choose your image. The output here is PNG, so anything with transparency or sharp text keeps its edges — but see the note below about what that costs in size.
- There is nothing to set. This page is already fixed at PNG.
- Check the result. PNG is lossless, so if the target could not be reached at a usable size the panel explains why instead of handing you a thumbnail.
Converting to PNG makes the file lossless from this point on, but usually much larger for photographs. Useful when you need to edit without further generation loss.
Convert JPG to PNG — the specification
| Input format | JPG |
|---|---|
| Output format | PNG |
| Quality | High — 90% where the target format is lossy |
| Transparency | Preserved |
| Metadata | EXIF is not carried across, which also strips GPS location data |
Convert JPG to PNG: what can go wrong
These are the failures that actually come up, in roughly the order they happen:
- The file is not really a JPG despite its extension. Renaming a file does not change its format.
- The file is corrupt or was only partially downloaded.
- The upload target does not accept PNG. Check before converting.
How it works
Your browser decodes the JPG file, then re-encodes it as PNG. Both steps use the browser's own image pipeline, so no library is downloaded and nothing is sent over the network.
Where the source has transparency and the target format does not support it, transparent areas are filled with white rather than black — the default that catches people out with other converters.
A measured run of this exact preset
Not an estimate: this page’s own code, run against a 12.2 MP photograph and an A4 scan at 200 dpi, with every encode recorded. The files and the method are published here.
| Input | Result | Change | Outcome |
|---|---|---|---|
| 12.2 MP photograph 3024 × 4032 px · 2.94 MB | 15.52 MB 3024 × 4032 px | 0% smaller | Converted at high quality |
| A4 scan at 200 dpi 1654 × 2339 px · 996.0 KB | 5.02 MB 1654 × 2339 px | 0% smaller | Converted at high quality |
Step by step
The two inputs do not behave the same way, and the gap is the useful part: the 12.2 MP photograph finished 3.1× larger than the A4 scan at 200 dpi under the same settings. Detail costs bytes. If your own file is flat — a scan, a screenshot, a document photographed straight on — expect results nearer the A4 scan at 200 dpi row.
Who needs Convert JPG to PNG
Fixing format rejections on upload forms, preparing images for software that only accepts certain formats, and reducing file size where the source format is inefficient.
Convert JPG to PNG — frequently asked questions
Does converting lose quality?
The conversion itself is high quality, but note that quality already lost in the source cannot be recovered. Converting a heavily compressed JPEG to PNG preserves the artefacts at a larger file size.
Is EXIF data preserved?
No. Metadata including camera details and GPS coordinates is discarded during conversion. For most people that is a privacy benefit, but if you need EXIF retained, this is not the right tool.
Can I convert several files at once?
Not currently — one file at a time. Each conversion takes under a second, so a small batch is quick.
Which file types can I upload?
JPG, PNG, WebP, GIF, BMP and HEIC from an iPhone all go in. The output here is PNG. Conversion happens as part of the process, so there is no need to convert first.
Does this work on a phone?
Yes, including photos straight from your camera roll. The work happens on the device, so a very large image is slower on a phone than on a laptop, but nothing is uploaded either way.
Is this tool really free?
Yes. No account, no trial period, no watermark on the output and no cap on how many times you use it. The site is funded by advertising.
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Background reading: How to Compress an Image to Any Size: The Complete Guide
Your photo never leaves your device. Open your browser's Network tab while you use this page and you will see no upload — how that works.
Disclaimer. Published requirements change without notice. Confirm against the official source before you submit. Full disclaimer.