ARW to TIFF Converter

Convert ARW to TIFF: What This Tutorial Covers

This walks a Sony shooter through rendering a .arw into a flat, print-ready TIFF: when that handoff is the right move, the one setting that quietly decides whether your TIFF is lossless, and the mistakes that produce a bigger-but-worse file. The short version is that you should convert a copy for print, layout or archival delivery and keep the original .arw as your editable master, because the render bakes in white balance and exposure and the raw's latitude does not come back afterwards.

How to Convert ARW to TIFF

1. Upload Your ARW File: Drag and drop your Sony .arw onto the page or click "+ Add Files" to browse. A whole card's worth of Alpha raw frames can be queued in one batch and they all convert with the same settings.
2. Change the Compression Type: Open Advanced Options and set "Compression Type". It arrives preselected on JPEG, which is lossy — switch to LZW, DEFLATE, PACKBITS or NONE for a mathematically lossless TIFF.
3. Set the Extension and Resolution: Use "File extension" to take the result away as .tiff or .tif, leave "Image resolution" on "Keep original" for a full-size master, and keep "Quality preset" on "Very High (Recommended)" so the raw is developed at full fidelity.
4. Convert and Download: Click "Convert" and download the TIFF. No sign-up, no watermark.

Walk-through: Choosing a Compression Type

This is the decision that matters, and the preselected value is not the one most people want. "Compression Type" starts on JPEG, which produces a smaller file by throwing pixel data away — perfectly reasonable for a working copy, quietly wrong for an archive. Everything else about the conversion is fixed by the render; this dropdown is where you choose fidelity or size.

• Print master, lab order or layout placement: choose LZW. It is lossless, and it is the compression every print RIP, Photoshop, Affinity Photo, InDesign and GIMP install has understood for decades.
• Long-term archive where storage matters: choose DEFLATE. Also lossless, zip-style, and usually a little smaller than LZW on photographic content.
• Handing the file to old or picky software: PACKBITS is the simplest lossless scheme in baseline TIFF and the most forgiving with elderly readers; NONE writes the file uncompressed, which is the largest option but the one nothing can refuse.
• A disposable working copy: leaving it on JPEG is fine, as long as you know the pixels change and that some prepress and scientific tools will not open a JPEG-compressed TIFF at all.
• Modern extension codecs: WebP, ZSTD and JP2K appear in the dropdown and can produce small files, but only recent TIFF readers understand them, so avoid them for anything you send to someone else.
• Not for photographs: CCITT Fax 4 is a bilevel scheme built for 1-bit scanned documents. Point it at a color photo and you are asking the wrong question.

Matching the Render to the Job

There is no bit-depth or DPI control on this page, so your remaining levers are the quality preset, the resolution and the extension. A TIFF is a delivery format here, not a hand-tuned master — pick the combination that fits where the file is going.

Common Errors and How to Fix Them

• "My lossless TIFF still threw away quality." "Compression Type" was left on the preselected JPEG. Re-run with LZW, DEFLATE, PACKBITS or NONE.
• "The TIFF is enormous — several times the size of the ARW." That is expected. The raw stores one reading per photosite; the TIFF stores full color channels for every pixel, so a 24-megapixel frame amounts to roughly 72 MB of 8-bit RGB before compression even starts. If size beats fidelity, render ARW to JPG instead.
• "The colors or exposure do not match what I saw on the camera." A Sony Creative Look or picture profile is an in-camera rendering instruction, and third-party raw processors do not reproduce it exactly. Apply the look in a raw editor and export a finished image if color accuracy is critical.
• "My old software will not open the TIFF." It probably does not support the compression you chose. PACKBITS and NONE are the safest for legacy readers, and some tools reject JPEG-in-TIFF outright.
• "I expected to keep editing it like a raw." A rendered TIFF is a finished image. White balance and exposure are fixed, and the highlight headroom is gone. Keep the .arw and convert copies as you need them.
• "The upload stalls on a big batch." Full-frame Sony raws routinely run 25 to 60 MB each, so a card's worth is a genuinely large transfer. Convert in smaller groups if your connection is slow.

When This Doesn't Work

TIFF is a rendered, flattened target, so it is the wrong choice whenever you still need the raw's headroom or a small file. If you plan to recover a blown sky, reset white balance or push exposure a stop, do that first in Lightroom, Capture One, DxO PhotoLab or RawTherapee, and export the TIFF from there — that is also where you get an explicit bit-depth choice. If the file only needs to be looked at or emailed, ARW to JPG is the universal pick and ARW to AVIF is the smallest modern one. And if you have already made TIFFs and simply need them lighter, the Image Compressor accepts TIFF directly.

Frequently Asked Questions

Should I keep the original ARW after converting to TIFF?

Yes, always. Even a lossless TIFF is not a substitute for the raw: white balance and exposure are baked in, the highlight and shadow recovery latitude is gone, and Sony's raw-only metadata does not survive the render. Treat the TIFF as a high-quality working, print or delivery copy, and archive the .arw separately as the negative you can always go back to.

I chose a lossless compression, so why does the TIFF still look different from the raw?

Because two separate things happen during the conversion, and only one of them is under the compression setting. First the raw mosaic is demosaiced and developed into RGB using a standard interpretation — that is where contrast, color and white balance get decided. Then those finished pixels are encoded, and LZW or DEFLATE preserves them exactly. Lossless compression guarantees the second step changes nothing; it cannot make the first step match your editor's rendering.

Can I convert a whole card of ARW files in one go?

Yes. Drop them all onto the page and they queue together, converting with the same compression type, quality preset and resolution. Since every output is a full-size rendered raster, expect the download to be substantially larger than the raws you uploaded — a folder of lossless TIFFs from a day's shoot adds up quickly, which is why DEFLATE is worth choosing over NONE for bulk archiving.

Will this TIFF open in InDesign, a print RIP or at a photo lab?

An LZW or uncompressed TIFF will, and that combination is the safest thing you can hand to a stranger. The two failure modes worth knowing are JPEG-in-TIFF, which some prepress and scientific applications refuse, and the modern WebP, ZSTD and JP2K entries in the dropdown, which older readers do not implement at all. If in doubt about the destination, use LZW.

Does the TIFF keep Sony's Creative Look or picture profile?

No, not as a re-editable setting. Those are instructions the camera applies when it develops a JPEG or a preview; they live in the raw's private metadata rather than in the pixel data. Any converter outside Sony's own software applies its own default rendering instead, which is why a converted file can look flatter or cooler than the preview on the camera's screen. To carry a look across, apply it in a raw editor and export from there.

How is this different from exporting a TIFF out of Lightroom?

Lightroom lets you set the bit depth, the color space and the resampling method, and it applies whatever develop settings you have made to that image. This page renders the raw with a standard interpretation and gives you the compression type, quality preset, resolution and extension. It is the faster path when you want a straight, unedited render of the frame — a proof, a layout placeholder, a file for someone else's pipeline — and the wrong path when the edit is the point.

Can I convert the TIFF back into an ARW afterwards?

No, and no tool can. A raw file is a record of what one specific sensor read through one specific color filter array; once it has been demosaiced into RGB, that mosaic cannot be reconstructed. Renaming or re-encoding a TIFF as a raw would produce a file that lies about its own contents. This is the practical reason to keep the .arw rather than deleting it once you have a nice TIFF.

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

Your ARW is uploaded over an encrypted connection, developed and encoded on our servers, and deleted automatically a few hours after conversion, together with the TIFF it produced. There is no sign-up, no watermark, and nothing is shared or made public. Upload size and time are the real constraints on a large job, since the raws going up and the TIFFs coming back are both substantial files.