how to digitize slides and negatives, and keep them in order.

for a few decades, a lot of family life went onto film. some of it came back as prints, but plenty came back as slides that were shown on a living room wall once or twice, or as strips of negatives tucked behind the prints in a paper envelope. the prints have often been lost or faded. the film is still there, and it usually holds more detail than any print made from it.

the trouble is that you can't see much just by holding film up to a lamp. so it sits in boxes. the steps below are a gentle way to change that, whether you scan it yourself or hand it to someone else.

step 1: gather the film and see what you have

before choosing a method, take stock. a rough count is enough.

• slides. small squares of film in cardboard or plastic mounts, often in carousels, trays or little yellow boxes.
• negatives. strips of film, usually in sleeves inside the envelope that came back with the prints. colors look reversed and orange-tinted.
• size. most family film is 35mm. if some of it is a different size, like the wider square medium-format film or the small cartridge films of the 1970s, set it aside. not every scanner or service handles those.

handle film by its edges or its mount, ideally with cotton gloves, since fingerprints are hard to remove later.

step 2: read the dates before you scan

this is the step most people skip, and it's the one that saves the most time later. film often carries its own clues about when it was made:

• slide mounts. many slides processed by kodak from the late 1950s onward have the month and year pressed into the cardboard mount. it's often an inkless dent, so tilt the slide under a lamp or shine a small flashlight across it to read it. that date is when the film was developed, not when it was shot, but it's usually close.
• envelopes and sleeves. the paper envelopes from the photo counter sometimes have a date, a stamp or someone's handwriting. keep each envelope with its negatives.
• writing on mounts and boxes. "lake powell, '78" in a parent's hand is worth more than any setting on a scanner.

sort the film into rough groups by year as you go, and keep a simple list of what each box or envelope holds. you'll use it in step 6.

step 3: choose how to scan

there are four common ways to digitize slides and negatives. each one trades time, cost and quality a little differently.

• a flatbed scanner with a film adapter. some flatbed scanners have a light in the lid and come with holders for slides and strips of negatives. it's slower than the other options, but it does a good job and also handles prints. check that the model you're looking at says it scans film; most flatbeds only scan paper.
• a dedicated film scanner. built only for film, usually one frame at a time. good ones give the sharpest results at home.
• a camera and a light. if you already have a digital camera with a macro lens, you can photograph each slide or negative against an even light, like a small light pad, with the camera held still on a stand. it's fast once it's set up. negatives then need their colors flipped in editing software.
• a scanning service. you mail or drop off the film and get files back. it's the least work, and for thousands of frames it may be the only realistic way. ask what resolution they scan at, whether they return the originals, and how they ship. if a box holds the only copy of a decade, consider sending it in smaller batches.

the small all-in-one slide converters sold online are quick and simple, but they tend to give softer, smaller files. they're fine for a first look at what's in a box. for the frames you care about, a scanner or service does better.

step 4: pick settings once, then leave them

film is tiny, so it needs a much higher resolution than prints. a 35mm frame is about 36 by 24 millimeters. a few settings work well for most family film:

• resolution. scan 35mm film at 3000 to 4000 ppi. at 3000 ppi a 35mm frame comes out around 4,250 by 2,800 pixels, about 12 megapixels, which is plenty for viewing and good-sized prints. kodachrome slides, with their very deep blacks, often look better at 4000.
• color. scan color film in color, and choose the right film type in the software: positive for slides, color negative or black-and-white negative for strips.
• dust removal. some scanners have an automatic dust and scratch tool, often called digital ice. it works well on most color film, but scanner makers advise against it for kodachrome and traditional black-and-white film. for those, turn it off and use a soft blower brush on the film instead.
• file type. keep a high-quality copy, like a tiff or a high-quality jpeg.

scan a handful of test frames first and look at them at full size. once they look right, keep the settings the same for the whole batch, so the collection feels consistent.

step 5: name and file the scans as you go

scanning software usually names files with a number. that's fine at first, but a folder of eight hundred numbered files is hard to come back to. a simple habit helps: one folder per box or envelope, named with its year and a few words, like 1978 lake powell slides. if you scan the cardboard mount too, the handwriting and date stamp come along with the picture.

if you're also working through prints, scanning old photos at home uses the same folder habits, so both sets fit together.

step 6: give each scan back its year

here's the part that catches people out. a scan doesn't know when the photo was taken. every file is dated the day you scanned it, so a box of slides from 1978 shows up in a photo app as one afternoon in 2026.

this is where the list from step 2 pays off. use the dates from the mounts, envelopes and handwriting to set the date on each folder of scans. it doesn't need to be exact. the right year, or a season, is enough to put things in order. fixing wrong dates on photos walks through how to change dates in batches on iphone, mac, google photos and windows.

step 7: back it up, and keep the film

a weekend of scanning on one computer is still one copy. put the scans in at least two more places, like a separate drive and a cloud account. the 3-2-1 habit for family videos works the same way here.

then put the film back in its boxes, somewhere cool, dry and dark, away from attics and basements. a good scan is a wonderful copy, but the film is still the original, and better scanners may come along later.

a few things that save time

• start with one box. pick the box you're most curious about. finishing one gives you a feel for how long the rest will take.
• skip the blanks. the out-of-focus and dark frames don't all need scanning. a quick look on a light pad helps you pick.
• ask the people who were there. an aunt or a parent can often name a place or a year at a glance. write it down while you can.

where treasure box fits

treasure box is the private life archive we're building to hold a whole life in one place, ordered by when things happened. the first version starts with photos and videos, laid out on one private timeline by the date each one was taken. that's why the date step matters: a slide from a 1978 road trip, with the right year, can sit beside the prints and stories from that same summer, instead of landing on the day you scanned it.

the scanning you do today is worth doing for any archive you use, now or later. once the files are on your computer, organizing old digital photos is a good next step, and finding duplicate photos helps when the same frame turns up as a print and a slide. if a private timeline sounds like the kind of home you'd want for them, see how treasure box works or read our privacy promises.

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