Convert JPG to PNG — Free, Fast & Private
Converting a JPG to PNG makes the file lossless from now on, not better. The JPEG compression is already in the pixels. Everything runs in your browser — nothing is uploaded.
The PNG will not look better, and it will be bigger
JPEG discarded detail when it was saved and PNG cannot restore it. The PNG stores the decoded JPEG pixels exactly, including its compression blocks and noise, which is why photographs usually grow a lot. The table below shows the size change on real files. Use lossless image compression if the goal is a smaller file with no further loss.
Why you would still do it
PNG avoids a second round of loss when you edit and re-save repeatedly, and it is accepted where a JPG is not, for example as an input to icon and logo workflows. If the next step is an icon, see PNG to ICO.
No transparency appears
A JPG has no transparent pixels, so the PNG comes out fully opaque. Removing a background is a separate step done with a background remover, not part of this conversion.
Metadata and orientation
The PNG does not carry the JPG's EXIF block (camera, GPS, timestamps). The rotation flag is applied to the pixels first, so a photo taken sideways stays upright.
When a PNG copy is useful
Convert to PNG when a tool or workflow demands PNG, when you will edit and save the picture many times, or when you want to avoid another lossy save. Do not convert simply to get a better-looking photo or a smaller file; neither happens. If the destination only needs a smaller picture, converting the other way, to WebP, is the better step.
Check the PNG against the JPG before you save
The result card shows the old and new size, with the new size in amber when it grew, together with the output dimensions. The dimensions match the source because this conversion does not resize.
Related
Files named .jfif are JPEGs too: use JFIF to PNG. To go smaller instead, try JPG to WebP. Other PNG directions are on the PNG converter.
JPG to PNG on real files: measured sizes
| File | Before | After | Change |
|---|---|---|---|
| 12 MP phone photo | JPG · 4032 × 3024 px · 3.73 MB | PNG · 4032 × 3024 px · 16.3 MB | 4.4× larger |
| Portrait / headshot | JPG · 3264 × 4653 px · 2.25 MB | PNG · 3264 × 4653 px · 14.3 MB | 6.4× larger |
| Scanned handwritten page | JPG · 3349 × 4281 px · 2.17 MB | PNG · 3349 × 4281 px · 12.3 MB | 5.7× larger |
| Screenshot saved as JPG | JPG · 1280 × 800 px · 79.9 KB | PNG · 1280 × 800 px · 209.0 KB | 2.6× larger |
Measured 2026-10-07 in Chromium 145.0.7632.6 by running this page's converter with its default setting (PNG) on each file. The photos and scans are CC0 or public-domain files from Wikimedia Commons; the screenshot is MiniPx's own; the screenshot JPG is MiniPx's own screenshot saved at JPEG quality 85. Sizes are shown as the tool shows them (1 KB = 1,024 bytes).