Korsan· sheet 51N 003Eshaho.nl

A Mac app for your photo archive

Korsan

Fix the date, place, and keywords of your photos, one or a thousand at a time.

Download for MacVersion 0.1.0 · Free · macOS
Latitude
55.6761° N
Longitude
12.5683° E
Copenhagen, Capital Region, Denmark
23 Dec 2025 · 15:45 · +01:00
Three photos of Copenhagen, one edit: date, place, keywords.Korsan, Grid

Fig. 1 · Place

Where these photos were taken

Korsan writes coordinates and place names into each photo. Any app that reads standard metadata can then show where it was taken. Choose a place to see its photo.

0° E10° E20° E30° E40° E50° E40° N50° N
The Gothic tower of Saint Nicholas' Church in Ghent.

Ghent

City
Ghent
Region
East Flanders
Country
Belgium
Coords
51.0543° N, 3.7174° E

A schematic chart, not a map view. Korsan has no map. The dashed line joins the places in date order. Places and dates are examples.

Fig. 2 · Label

Every photo gets its label

Most photos in an archive hang without a label. Korsan writes one field at a time into the photo itself.

A man under strings of small lights at night, holding out his hand.
  1. 01 · As found

    UntitledUnknown creatorDate unknownPlace unknownJPEG, 4000 × 6000 pxIMG_1785.JPG

  2. 02 · Date taken

    UntitledUnknown creator22 June 2025, 22:18 +04:00Place unknownJPEG, 4000 × 6000 pxIMG_1785.JPG

  3. 03 · Location

    UntitledUnknown creator22 June 2025, 22:18 +04:00Yerevan, Armenia · 40.1792, 44.4991JPEG, 4000 × 6000 pxIMG_1785.JPG

  4. 04 · Title and creator

    Under the lightsShaho Toofani22 June 2025, 22:18 +04:00Yerevan, Armenia · 40.1792, 44.4991JPEG, 4000 × 6000 pxIMG_1785.JPG

  5. 05 · Keywords and rating

    Under the lightsShaho Toofani22 June 2025, 22:18 +04:00Yerevan, Armenia · 40.1792, 44.4991night, lights, yerevan · ★★★★JPEG, 4000 × 6000 pxCollection of the photographer

Sheet 2Safe

Your photos stay safe

Korsan never changes the pixels of a photo.

It changes only the metadata. It writes only standard EXIF, IPTC and XMP fields, so Lightroom, Apple Photos, digiKam and Capture One read the result.

Before its first change to a photo, Korsan keeps a backup beside it: a.jpg_original. You can restore the original at any time.

The coloured houses of Nyhavn in Copenhagen, by the water.
IMG_2668.jpg Your photo, with the new metadata
IMG_2668.jpg_originalThe backup, as it was before the first change
Sheet 3Private

Everything stays on your Mac

No account. No cloud. No sync.

Korsan works on the folder you open. Its index and thumbnails stay in ~/Library/Application Support/korsan, and it can build them again from your photos.

Your Macphotosindexthumbnails
Sheet 4Install

Install

  1. Download the .dmg and drag Korsan into Applications.
  2. Open Korsan from Applications.
  3. The app is not signed yet. If macOS blocks it, open System Settings → Privacy & Security and click Open anyway. You do this once.
Needs
A Mac with Apple silicon (M1 or later)
Reads
JPEG, HEIC, PNG and TIFF
License
Free to use. Not open source.
Status
Early version. Keep a copy of your photos.
Download Korsan 0.1.0