Browser-only image tool
Compress PNG to 500 KB
PNG files are often much larger than JPEGs because they use lossless compression. When a portal requires your PNG file to be under 500 KB, this tool reduces it in your browser — no upload needed.
Upload your PNG and compress it to 500 KB instantly in your browser. Open the compress tool →
Why PNG files are large — and how to reduce them
PNG uses lossless compression: every pixel in the original image is preserved exactly. This makes PNG excellent for graphics, logos, and screenshots with text — but it also means PNG files are substantially larger than JPEGs for photographic content. A smartphone photo saved as PNG can easily exceed 10 MB, while the same photo as JPEG at good quality might be under 500 KB.
To reach a 500 KB target, this tool reduces the image dimensions until the resulting file is within the size limit. For most screenshots and graphics, 500 KB is generous enough to retain full detail at the original dimensions. For very large PNGs (4K screenshots, high-resolution graphics), some dimension reduction may occur — the result remains visually clear and readable at normal screen sizes.
PNG vs JPEG: when to use each format
| Use PNG when… | Use JPEG when… |
|---|---|
| The image has transparency (logos, cutouts) | The image is a photograph with continuous tones |
| The image has text, sharp lines, or diagrams | File size is more important than perfect pixel accuracy |
| The portal specifically requires PNG format | The image will be used in email or on social media |
| You need lossless quality for archiving or editing | The target file size is very small (under 200 KB) |
When to convert PNG to JPEG instead of compressing
If the portal does not specifically require PNG, converting your PNG to JPEG will almost always produce a much smaller file at the same visual quality — often 5–10x smaller. This makes hitting a 500 KB limit trivial for most photos. The trade-off is that JPEG does not support transparency: if your PNG has transparent areas, converting to JPEG will fill those areas with white.
For photographs with a plain background (passport photos, product shots on white), converting to JPEG is the recommended approach. For logos, graphics, interface screenshots, or images that need to retain transparency, keep the file as PNG and use this tool to compress it to 500 KB.
FAQ
Why is PNG larger than JPEG?
PNG uses lossless compression, preserving every pixel exactly. JPEG uses lossy compression, discarding some pixel data to achieve much smaller files. For photos, PNG is typically 3–10x larger than JPEG at the same dimensions.
Does compressing a PNG lose quality?
At 500 KB, most PNGs retain excellent quality. This tool reduces dimensions to reach the target size — the result remains visually sharp at normal viewing sizes. Very large original PNGs may see some dimension reduction.
What is the difference between PNG-8 and PNG-24 at 500 KB?
PNG-8 uses up to 256 colours (smaller files, may show banding). PNG-24 uses full 16.7 million colours with alpha transparency (larger files, more accurate). At 500 KB, PNG-24 can handle medium-resolution images with full colour fidelity.
What if the portal only accepts PNG?
Compress the PNG using this tool to meet the 500 KB limit. The tool reduces dimensions to reach the target size while preserving as much visual detail as possible.
Does converting PNG to JPEG lose the transparency?
Yes. JPEG does not support transparency. Converting a PNG with transparent areas to JPEG fills those areas with white. If transparency must be preserved, keep the file as PNG and compress it with this tool instead.