EXIF statistics: how you shoot

Which focal length do you actually use? Is that f/1.4 lens ever shot wide open? How often do you hit ISO 6400? Drop a year of photos here and find out.

How to use it

Drop photos or a folder onto the box, or use Choose photos… or Choose a folder… (on a phone, Choose photos opens the photo library). Thousands of files are fine: they are read six at a time, with a progress bar and a Stop button, and the charts fill in as they go. Files that are not photos (videos, sidecar files) are ignored, and files without EXIF are listed under Skipped files below the table.

Summary — how many photos, cameras and lenses, the date range, and the median focal length, aperture, shutter speed and ISO, and how often the flash fired.
Focal length — one bar per focal length when you use a handful (primes, or a phone’s cameras), otherwise ⅓-octave bins. 35 mm equiv. uses the equivalent focal length the camera wrote (phones and most compacts do; many interchangeable-lens cameras do not).
Aperture, Shutter speed, ISO — histograms in stops: apertures at the nearest ⅓ stop (a phone’s f/1.78 counts as f/1.8), shutter speeds and ISO at the nearest whole stop (1/250 s and 1/200 s share the 1/250 bar).
Cameras and Lenses — the most used first. Camera names are tidied ("NIKON CORPORATION NIKON D850" → "Nikon D850"). When a RAW file has no lens name, its lens range and apertures are used instead ("18-55mm f/3.5-5.6").
Photos per day (or per month or year over longer spans) and Time of day, from the time the photo was taken, on the camera’s clock.
Camera and Lens filters narrow every chart and the table. Count RAW + JPEG pairs once keeps one record when a camera saved both (same folder, same name, same time).
The table sorts by any column (tap the heading) and pages through 100 at a time. Export CSV saves the filtered table, with the shutter speed in seconds as well as in the usual notation, for a spreadsheet.

Formats

The page has its own small EXIF reader and reads only the start of each file (usually the first 128 kB; more for a RAW file whose metadata lies further in):

JPEG — the APP1 "Exif" segment.
HEIC / HEIF / AVIF (iPhones, many Android phones and newer cameras) — the item of type Exif found through the iinf and iloc boxes of the file’s meta box.
TIFF-based RAW — DNG, Nikon NEF, Sony ARW, Canon CR2, Olympus ORF, Pentax PEF, Samsung SRW and others are TIFF files; Panasonic RW2 has its own header and keeps the ISO in a private tag.
Canon CR3 — the CMT1 and CMT2 boxes (TIFF blocks) in the Canon uuid box.
Fujifilm RAF — the EXIF of the JPEG embedded in the RAW file.

Formats follow the EXIF 2.32 / CIPA DC-008 specification, TIFF 6.0, and ISO/IEC 23008-12 (HEIF).

Limits

Lens names come from the EXIF LensModel tag. Some cameras (older Nikon and Pentax bodies, adapted manual lenses) write it only in their private maker notes, which are not read; those photos show a lens range or "(unknown)".
Times are the camera’s clock as recorded; if it was on the wrong time zone, so are the charts. The UTC offset is shown in the CSV when the camera wrote one.
Phones that stack several frames record one shutter speed and ISO for the result.
Edited exports may carry the editor’s settings, or none at all. Files with no EXIF are skipped.
Photos are read and kept in this page only: close or reload it and the results are gone. The only things remembered are the focal-length toggle and the pairs setting.

Related: exposure (what those shutter speeds and ISOs mean), depth of field and lenses (equivalent focal length and aperture), flash, night-sky photography, sun and moon planner, image tools (inspect one photo’s EXIF, resize and convert).