JPG vs TIFF for Scanned Slides & Photos

Customers frequently ask which file format to choose when ordering scans. The short answer for most people is JPG. The longer answer depends on what you plan to do with the files. This page explains the technical differences in plain language so you can make the right decision for your situation — and avoid paying for TIFF files when JPG will serve you just as well.

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JPG — What It Is and Why It Works

JPG (also written JPEG — they are the same format, different abbreviations of the same standard) is the most widely compatible image format in existence. Every TV, smartphone, computer, tablet, photo printing service, digital picture frame, and social media platform on the planet can display a JPG. It will remain the universal image format for the foreseeable future.

JPG uses lossy compression, which means it discards some image data when saving in order to produce a smaller file. The key word is “some.” At the highest quality settings — which is what we use for all our scans — the discarded data is imperceptible to the human eye. Side by side on any screen or in any print, a maximum-quality JPG and a TIFF of the same scan are visually identical.

A 4,000 ppi JPG scan of a 35mm slide at maximum quality typically produces a file of 8 to 15 megabytes. That is a large, detailed file with more than enough resolution for any display size or print size you are likely to need.

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Do JPG Files Degrade Over Time?

This is the most common misconception about JPG files, and it is important to address it directly: no, a JPG file does not degrade from being stored or viewed.

A JPG sitting on a hard drive, flash drive, or cloud storage account is a static data file. It does not change. Copying it to another drive does not change it. Opening it to view it on a screen does not change it. The file is identical the day you open it in ten years as it was the day it was created, assuming the storage media remains intact.

What does cause degradation: opening the file in an image editor and re-saving it as a JPG. Each time a JPG is re-saved after editing, the compression algorithm discards additional data. If you repeatedly open, make a small edit, and re-save as JPG many times, the quality gradually degrades. This is called generation loss.

The practical implication: if you receive JPG scans and simply view, share, and print them without editing, they will look identical in ten years. If you plan to make extensive edits over time, re-saving as JPG each time is where degradation risk exists. The solution is straightforward and covered in the section below.

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TIFF — What It Is and When It Actually Matters

TIFF (Tagged Image File Format) is a lossless format, meaning it preserves every bit of image data with no compression-related discard. Re-saving a TIFF after editing does not degrade the file. For this reason, TIFF has been the standard archive and editing format in professional photography and print production for decades.

The trade-off is file size. A TIFF version of the same 4,000 ppi slide scan that produces an 8–15 MB JPG will typically be 60–120 MB or larger. That is six to ten times more storage per image. A collection of 500 slides at maximum-quality JPG might occupy 5–7 GB. The same collection as TIFF would occupy 30–60 GB. More storage means higher cost for flash drives or DVDs, and longer processing and write times.

TIFF is worth the premium in these specific situations:

• You are a professional photographer or archivist who will make iterative heavy edits to the files over time
• You are creating a permanent institutional archive where lossless preservation is a formal requirement
• You know you will re-save edited versions of specific images many times

TIFF is not worth the premium in these situations:

• You will be viewing, sharing, printing, and enjoying the scans without extensive re-editing
• You want to display scans on a TV, share them with family, or post them online
• You want to print copies at standard photo sizes
• Storage cost and file management simplicity matter to you

For the large majority of customers digitizing family slides and photos, high-quality JPG is the right choice. The files are smaller, faster to copy, universally compatible, and visually indistinguishable from TIFF in any real-world use.

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How to Get TIFF Quality Without Paying for TIFF Scanning

If you want lossless files for future editing but want to keep initial scanning costs lower, there is a practical approach: order JPG scans, then convert to TIFF before editing.

Here is the workflow:

1. Receive your scans as high-quality JPGs from us
2. Before making any edits to a specific image, open it in Photoshop or any capable editor
3. Immediately save a copy as TIFF (“Save As” → TIFF)
4. Do all future editing and re-saving on that TIFF file

The only image information you cannot recover this way is what was discarded during the original JPG compression — which at our maximum quality settings is invisible. From the moment you create the TIFF copy, all subsequent re-saves are lossless. You get the practical benefit of TIFF archiving at the cost of JPG delivery.

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JPG vs JPEG — Are They Different?

No. JPG and JPEG are identical formats. JPEG stands for Joint Photographic Experts Group, the committee that developed the standard. The file extension was shortened to .jpg on Windows systems because early versions of Windows required three-character file extensions. On modern systems, both .jpg and .jpeg refer to exactly the same format and are interchangeable.

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File Size Reference

To help with planning storage needs, here are approximate file sizes for a typical 4,000 ppi 35mm slide scan:

Format	Typical file size	500 slides
JPG (maximum quality)	8 – 15 MB	4 – 7 GB
TIFF (lossless)	60 – 120 MB	30 – 60 GB

Storage costs and turnaround times scale accordingly. For most family collections, JPG is the practical and economical choice.

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Related Pages

Pixels per inch — HD TV resolutions explained

Free Photoshop editing on every scan

Slide scanning FAQ