Convert PEF to PNG — Lossless Quality
PEF files from Pentax bodies carry 14-bit sensor data that most software cannot read. PNG is the lossless target: everything the demosaic produced survives, at the cost of a file several times larger than a JPG.
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Modern format with excellent compression. Limited browser support.
Apple's format. Excellent quality at small sizes.
Lossless format. Large files, ideal for print/archival.
256 colors max. Best for simple graphics.
Uncompressed bitmap. Very large files.
Vector trace. Best for logos and simple graphics. Not a pixel-perfect conversion.
Same format? You might want to compress instead.
SSIM-optimized — finds the lowest file size at your chosen visual fidelity.
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Lossless format — files can be large
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Best for logos, icons, and line art. Photos produce stylized results.
BMP files are uncompressed and can be very large. Consider TIFF (LZW) or PNG for lossless with smaller file sizes.
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PEF vs PNG Comparison
| Feature | PEF | PNG |
|---|---|---|
| Full Name | Pentax Electronic Format | Portable Network Graphics |
| Lossy Compression | ❌ | ❌ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ❌ | ✅ |
| Animation | ❌ | ❌ |
| Browser Support | None — RAW editors only | All browsers, all devices |
| Color Depth | 14-bit per channel | 16.7M+ (24/32/48-bit) |
| Typical Use | Pentax DSLRs, which can also write DNG | Screenshots, graphics, logos, images needing transparency |
| Year Introduced | 2003 | 1996 |
Why Convert PEF to PNG?
PNG is lossless, so nothing is discarded a second time after the RAW decode. That matters for APS-C and full-frame files headed into further editing, where a JPG's compression artefacts would compound with every save. Note that Pentax bodies can write either PEF or DNG straight out of the camera, so a shooter who picked PEF chose the proprietary option deliberately.
How to Convert PEF to PNG
Upload your PEF file, or drop a batch of up to 50 at once.
The RAW data is demosaiced and written to PNG without a second lossy step.
Download the PNG. Expect it to be several times the PEF's size — that is lossless compression doing its job.
Quality Note
The PNG is lossless relative to the decoded image, not to the PEF. The 14-bit sensor data is reduced to 8 bits per channel during the demosaic; PNG then preserves that result exactly.