PEF to TIFF Converter

PEF to TIFF Converter

A .pef is a Pentax raw — the unprocessed sensor data from a K-series camera, stored in a TIFF-based container that few programs outside Pentax's own software open directly. TIFF is the opposite end of the same family: a fully rendered, lossless, tagged image that print shops, layout software, and archives have read for nearly forty years. This converter demosaics the raw and writes a flat RGB TIFF on our servers, so think of the result as a finished print or archival copy and keep the original .pef as your editable master. The tables below explain what each format actually is before the steps.

PEF Format at a Glance

TIFF Format at a Glance

How to Convert PEF to TIFF

1. Upload Your PEF File: Drag and drop your Pentax .pef files onto the page or click "+ Add Files" to browse. You can queue several raw frames from a K-series body and convert them together.
2. Pick a Compression Type: Open Advanced Options and set "Compression Type" — choose LZW, Deflate, PackBits, or None for a mathematically lossless TIFF. The default is JPEG, which is lossy, so switch it if you want a true archival file.
3. Set the Quality Preset and Extension (Optional): Leave "Quality Preset" on "Very High (Recommended)" to preserve detail, use "Image resolution" only if you want to scale down, and pick .tiff or .tif under "File extension" to match your software.
4. Convert and Download: Click "Convert" and download your TIFF. No sign-up, no watermark.

Frequently Asked Questions

Is PEF really a kind of TIFF, and does that make this conversion lossless?

Structurally, yes — PEF is a specialized TIFF variant, using the same tagged file layout that DNG also builds on, which is why people describe both Pentax raw formats as "TIFF-based." But shared structure does not mean the pixels copy across untouched. A PEF holds an undeveloped Bayer mosaic, and the converter has to demosaic and develop it into ordinary RGB pixels before writing the TIFF. Whether that output is lossless is decided by your "Compression Type" choice — LZW, Deflate, PackBits, or None — not by the common heritage.

Do I lose my Pentax raw editing latitude converting PEF to TIFF?

Yes. A PEF is an undeveloped negative: white balance, exposure, highlight recovery, and the Pentax Custom Image look are all still adjustable in a raw editor because they are stored as instructions (often in an XMP sidecar), not baked into pixels. Writing a TIFF forces the converter to demosaic that sensor data and fix the current white balance, exposure, and tone as ordinary RGB. Once it is a TIFF you are editing a finished image, not the raw — so adjust the PEF first if you want control, then convert, and keep the original .pef as your master.

Which "Compression Type" should I choose for an archival TIFF?

For a true lossless archive or print master, choose LZW, Deflate, or PackBits — all three discard nothing, so every rendered pixel survives, and they are read by Photoshop, Affinity, Lightroom, GIMP, and print RIPs. Deflate (zip-style) usually writes the smallest file; LZW is the most universally recognized by legacy software; PackBits is the simplest and most broadly compatible with very old TIFF readers; None writes the largest, fully uncompressed file. The page defaults to JPEG, which is lossy and is rejected by some prepress tools, so change it unless you specifically only need a smaller flat copy.

Does this converter let me pick 16-bit output?

No — there is no bit-depth selector on this page. A Pentax sensor records roughly 12- or 14-bit data, and the TIFF specification can carry more than 8 bits per channel, but this converter renders to a standard high-fidelity TIFF rather than letting you hand-pick 8-bit versus 16-bit. For most print and archival uses the rendered TIFF here is plenty; if you specifically need a controlled 16-bit export for heavy grading, do that step from a raw editor that exposes the setting.

Why is my TIFF so much larger than the PEF file?

The PEF stores a single, compactly packed raw mosaic — one brightness value per photosite behind a color filter array. A TIFF stores fully rendered RGB pixels, three color planes for every pixel, so even with lossless LZW or Deflate the file is substantially larger, and an uncompressed (None) TIFF is larger still. In our testing, a 24-megapixel PEF around 25 MB rendered to a lossless LZW TIFF well over 100 MB, which is normal for a flat RGB image. If file size matters more than edit headroom, render to PEF to JPG or PEF to AVIF instead.

What is the difference between the .tiff and .tif output?

Nothing but the filename. .tiff and .tif are two extensions for the identical Tagged Image File Format; the three-letter .tif exists because some older Windows software expected eight-dot-three names. This page lets you pick either under "File extension," and the bytes are the same. If your workflow specifically wants the three-letter name, the PEF to TIF page produces the exact same file with a .tif extension.

Can I open the resulting TIFF in a web browser or share it online?

Not reliably. TIFF is a professional and archival format, not a web one: Safari can display TIFFs, but Chrome and Firefox generally cannot, so a TIFF is the wrong choice for a web page or a quick share. Use it for print, layout, scanning, and archival masters, and when you need something that opens everywhere render PEF to JPG, or PEF to AVIF for a small modern web copy.

How are my files handled, and how long are they kept?

Your PEF is uploaded over an encrypted connection, rendered into a TIFF on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, and your photos are never shared or made public. The main practical limit on a big upload is its size and the time it takes to send, since Pentax raws often run tens of megabytes each. For privacy-sensitive originals, keep the .pef locally and convert only the copies you need.