Convert PEF to WEBP — Smaller Web Files
A Pentax PEF file is 20–40 MB of RAW sensor data, which is not something you put on a web page. WEBP is the modern answer — smaller than JPG at matching quality and supported by every current browser.
Image converter
Drag and drop files or folders here, or
HEIC, WEBP, AVIF, TIFF, BMP, SVG, GIF, PNG, JPG, PDF, CR2, NEF, ARW, DNG — up to 50MB each, or 50 from a folder
Your Recent Conversions
·
Image
Camera
Exposure
Location
Color Profile
Format Details
What to try
Image Comparison
Conversion Options
Ctrl+Z undo · Ctrl+Y redo
·
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.
Conversion complete!
Enjoying KoalaPic? Share it with others.
Settings snapshot
Manage Custom Presets
No custom presets yet. Use the "+ Save" button to create one.
Image Comparison
Keyboard Shortcuts
General
PEF vs WEBP Comparison
| Feature | PEF | WEBP |
|---|---|---|
| Full Name | Pentax Electronic Format | Web Picture Format |
| Lossy Compression | ❌ | ✅ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ❌ | ✅ |
| Animation | ❌ | ✅ |
| Browser Support | None — RAW editors only | All modern browsers (Chrome, Firefox, Safari 14+, Edge) |
| Color Depth | 14-bit per channel | 16.7M+ (24/32-bit) |
| Typical Use | Pentax DSLRs, which can also write DNG | Web images (smaller than JPG/PNG with same quality) |
| Year Introduced | 2003 | 2010 |
Why Convert PEF to WEBP?
WEBP is typically 25–35% smaller than JPG at matching quality and is supported by every current browser. For a Pentax shooter publishing 24–36 MP frames, that is bandwidth saved on every view. 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 WEBP
Upload your PEF file. Up to 50 files per batch, 50 MB each.
KoalaPic decodes the Pentax RAW and encodes WEBP at quality 85 by default.
Download the WEBP, or adjust quality first if you want a smaller file.
Quality Note
WEBP at quality 85 is visually indistinguishable from the JPG equivalent while landing 25–35% smaller. For a 24–36 MP Pentax frame that is a meaningful saving on every page load.