Convert PEF to GIF — Quick Previews
PEF is Pentax's RAW format, holding 14-bit sensor data per channel. GIF is the opposite extreme — 256 colours total — which makes it useful for a quick preview and unsuitable for the photograph itself.
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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.
Need to crop first? Use the Crop tool. Want to adjust or filter? Try the Editor.
Resize tool → Live preview, percentage scaling, and dimension presets.
Tip: Use PNG or WebP for transparent output. Standalone tool →
Lossless format — files can be large
GIF is limited to 256 colors
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.
Leave empty for all pages. Multi-page PDFs produce a ZIP.
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PEF vs GIF Comparison
| Feature | PEF | GIF |
|---|---|---|
| Full Name | Pentax Electronic Format | Graphics Interchange Format |
| Lossy Compression | ❌ | ✅ |
| Lossless Compression | ✅ | ❌ |
| Transparency | ❌ | ✅ |
| Animation | ❌ | ✅ |
| Browser Support | None — RAW editors only | All browsers, all devices |
| Color Depth | 14-bit per channel | 256 (8-bit) |
| Typical Use | Pentax DSLRs, which can also write DNG | Animations, simple graphics, memes |
| Year Introduced | 2003 | 1987 |
Why Convert PEF to GIF?
GIF's 256-colour ceiling is severe for photographs, but the files are small and every system on earth displays them. It suits a contact sheet or a quick look, not a delivery. 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 GIF
Upload your PEF file by dragging it in or clicking to browse.
The RAW is decoded and quantised to a 256-colour palette with dithering.
Download the GIF. It will be small, and visibly coarser than the original.
Quality Note
Reducing a 24–36 MP photograph to 256 colours is a large loss. Dithering hides some of it as fine grain, but skies and skin tones band visibly. Use GIF for previews only.