PEF Converter

How to Convert a PEF File to Any Format

1. Upload Your PEF File: Drag and drop your Pentax RAW file or click "Add Files". The converter accepts .pef files from Pentax DSLRs and mirrorless bodies. Batch is supported — drop in a whole shoot and each frame converts in parallel.
2. Pick an Output Format and Quality Preset: Use the Image File Extension dropdown to choose your target — JPG, PNG, TIFF, WebP, AVIF, BMP, HEIC, GIF, PPM, or PDF. The default Image Compression is the "Very High (Recommended)" Quality Preset; switch to Image Quality (%) for fine control, or Specific file size to cap output at an exact MB target.
3. Resize or Set Resolution (Optional): Under Image resolution, keep the camera's original pixel dimensions, scale by Resolution Percentage, pick a Preset Resolution (4320p down to 360p), or enter a custom Width × Height with aspect ratio locked. For TIFF output you can also set the compression type and bit depth.
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

Popular PEF Conversions

• PEF to JPG — a small, universally viewable photo for sharing, email, and the web
• PEF to PNG — lossless output when you need clean edges or a transparent layer downstream
• PEF to TIFF — a high-bit-depth master for archiving or further editing in Photoshop
• PEF to WebP — modern web delivery at roughly 25-35% smaller than JPG at equal quality
• PEF to PDF — drop a proof or contact frame into a document for clients

Why Convert a PEF File?

PEF (Pentax Electronic File, sometimes written "Pentax Electronic Format") is the proprietary RAW image format written by Pentax DSLRs and mirrorless cameras. Like every camera RAW, a PEF is not a finished picture — it is a near-direct dump of the sensor's mosaic data plus a tone curve, white-balance tags, and the camera's exposure metadata, recorded at 14 bits per channel on recent K-series bodies (12-bit on older models). That extra latitude is exactly why photographers shoot RAW: it leaves room to recover highlights, lift shadows, and re-set white balance after the fact. The catch is that almost nothing outside dedicated photo software can display a PEF, so at some point nearly every Pentax shooter has to convert.

The most common reason is simply visibility. Web browsers, phones, social platforms, Microsoft Office, and most image viewers cannot open a .pef at all, so the file has to become a JPG, PNG, or WebP before anyone but you can see it. A second reason is editing hand-off: a 16-bit TIFF is a far more universal "master" than a proprietary RAW, so converting PEF to TIFF gives you something Photoshop, GIMP, and Affinity all read identically. A third is size — RAW files are large, and a JPG or WebP export is a fraction of the size for client galleries or archives where you don't need to re-develop later.

It's worth knowing that Pentax bodies let you record RAW as either PEF or Adobe's open DNG, selectable in the camera's file-format menu. DNG enjoys much wider third-party support, which is why many Pentax shooters pick it — but if your existing library is already in PEF, converting is the path of least resistance rather than re-shooting.

PEF Format at a Glance

Frequently Asked Questions

What program opens a PEF file?

On a Pentax shooter's own machine, the official tool is Pentax Digital Camera Utility (which replaced the older PENTAX PHOTO Laboratory). Beyond that, PEF is read by Adobe Camera Raw and Lightroom, and by the open-source RAW developers RawTherapee and darktable, because their decoders reverse-engineer the format — Pentax has never published the full PEF specification. Ordinary image viewers, browsers, and Office apps cannot open a .pef at all, which is why converting to JPG, PNG, or TIFF is usually the quickest way to actually see and share the photo.

Will I lose image quality converting PEF to JPG?

Some, but it's controllable. A PEF holds 12- or 14-bit sensor data; JPG is 8-bit and lossy, so the export bakes in your white balance and tone curve and discards the editing latitude RAW was protecting. For a finished photo that's fine — that's what JPG is for. Pick the "Very High" Quality Preset (or Image Quality 90%+) to keep compression artifacts invisible at normal viewing sizes. If you want to keep maximum quality for further editing, convert to TIFF or PNG instead, both of which are lossless.

Should I convert PEF to DNG, or just shoot DNG in the first place?

If you still have the camera and the shots aren't taken yet, switching the body's RAW format to DNG in the menu is the cleaner long-term choice — DNG is an open Adobe standard with far broader third-party support and self-contained metadata. For PEF files you already have, this tool converts to standard delivery and editing formats (JPG, TIFF, PNG, WebP, PDF) rather than to another RAW container; the goal there is usually a viewable or editable file, not a second RAW.

What's the difference between PEF and DNG?

Both are RAW formats that wrap your Pentax sensor data, and for the same shot the underlying image quality is effectively identical. The differences are practical: PEF is Pentax-proprietary with an unpublished spec, so support lags when new cameras ship and metadata often lives in separate XMP sidecar files. DNG is Adobe's documented open standard, tends to embed its metadata inside the file, and is read out of the box by far more software. PEF files are usually a bit smaller. Many Pentax photographers shoot DNG for exactly the compatibility reasons above.

Which format should I convert PEF to for archiving?

TIFF is the usual answer. A 16-bit TIFF is a lossless, widely-readable master that preserves the tonal depth you developed from the RAW, and it will still open cleanly decades from now without depending on a proprietary decoder. PNG is a fine lossless alternative if you don't need 16-bit depth. The one thing to avoid for an archival master is a low-quality JPG, since its lossy compression throws away data you can't get back. In our testing, a 14-bit PEF from a recent Pentax body exports to a 16-bit TIFF that is several times the size of an equivalent high-quality JPG but holds far more editing headroom.

Are my PEF files kept private when I convert them?

Yes. Files are uploaded over an encrypted (TLS) connection, processed on our servers, and deleted automatically after a few hours. There's no sign-up, no watermark added to your photos, and your files are never shared or made public. The only practical limit on a large RAW batch is upload size and your connection speed, not any per-file cap.