Edit PEF Files Online
Open Pentax Electronic File (PEF) files from Pentax cameras right in your browser — decode, color grade and export JPEG in minutes. Free, no upload, no software to install.
What is a PEF file?
PEF is the RAW format produced by Pentax K-3 Mark III, K-1 Mark II, KF, K-70 and other Pentax DSLRs. PEF is Pentax’s native RAW format. Many Pentax bodies can also shoot DNG — both open here without any extra software.
Because PEFis a RAW format, most image viewers and web tools can't open it. OpticRaw decodes it with LibRaw — the same engine used by professional desktop software — compiled to WebAssembly so it runs locally in your browser.
How to edit a PEF file online
- Open OpticRaw and drag your PEF file into the window.
- Wait a few seconds while the RAW is decoded (your camera's white balance is applied as the starting point).
- Edit with Lightroom-style tools: exposure, tone curve, HSL color mixer, color grading wheels, masking brush, crop & straighten.
- Click Export to save a full-resolution JPEG or PNG.
Why edit PEF instead of JPEG?
RAW keeps the full sensor data: highlights you can pull back, shadows you can lift cleanly, and white balance you can change after the fact. Editing the PEF file gives dramatically better results than editing the camera JPEG — especially for exposure mistakes and tricky light.
Just need a JPEG? You can also convert PEF to JPG in one click — full resolution, many files at once.
Also works with other RAW formats
ARW (Sony) · CR3 (Canon) · CR2 (Canon) · ORF (Olympus / OM System) · NEF (Nikon) · DNG (Adobe (universal)) · RAF (Fujifilm) · RW2 (Panasonic) — plus SRW, NRW, SR2, 3FR, IIQ and more.
Frequently asked questions
Can I open PEF files online for free?
Yes. OpticRaw decodes PEF files directly in your browser using LibRaw (WebAssembly) — free, no watermark, no account.
Is my PEF file uploaded to a server?
No. The file is decoded and edited entirely on your device. It never leaves your computer.
How do I convert PEF to JPEG?
Open the PEF file, make any adjustments you want (or none), then click Export and choose JPEG. You get a full-resolution JPEG in seconds.
Do I need Lightroom or Photoshop to edit PEF?
No. This editor gives you Lightroom-style tools — tone curve, HSL mixer, color grading wheels, masking, crop — right in the browser.
Does editing change my original PEF file?
Never. Editing is non-destructive: the original RAW file stays untouched and you export a separate JPEG or PNG.
Works in Chrome, Edge, Firefox and Safari. Your photos are processed on your device and never uploaded.