Convert PNG to JPG (Compressed Format)
Convert PNG images to JPG format for smaller file sizes.
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How PNG → JPG conversion works
PNG uses lossless compression and supports an alpha (transparency) channel. JPG uses lossy compression and has no transparency support. This tool decodes the PNG pixel data, composites any transparent areas onto a solid white background (configurable in Pro), and encodes the result as JPG at a configurable quality level. Higher quality settings produce larger files with less visible compression artefacts. Lower quality settings produce smaller files with visible artefacts around edges and in detailed areas. The conversion is not reversible — original PNG quality cannot be recovered from the JPG output.
Limitations
- Transparency is permanently lost — the alpha channel is composited to white by default.
- Slight quality reduction is always introduced by JPG compression — it is not reversible.
- Not suitable for images that need to remain transparent (logos, icons, graphics with backgrounds).
When to use this conversion
- Preparing images for web upload where file size matters more than perfect quality.
- Converting screenshots for email attachments where PNG sizes are too large.
- Social media uploads where PNG file sizes exceed platform limits.
Alternatives to consider
- WEBP format for better compression with optional transparency support.
- Adjust JPG quality setting to balance size vs quality before uploading.
Frequently asked questions
What happens to transparent areas?
Filled with solid white by default. To preserve transparency, use PNG to WEBP instead — WEBP supports transparency with better compression than PNG.
Is the quality loss visible?
At high quality settings (85–95), loss is minimal for most images. At lower settings, artefacts become visible around edges and in detailed areas.
Can I convert back to PNG?
Yes, but quality lost during JPG compression cannot be recovered. The round-trip will not restore the original.