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For macOS

Caption your photo collection, with AI.

Browse folders on your Mac or choose photos from your Apple Photos Library. Create natural, detailed captions with Google Gemini, choose from four alternatives, and save the result to EXIF/IPTC metadata while preserving your originals.

Download on the Mac App StoreWatch the demo ↓
PhotoCaptioner AI on macOS, showing generated captions and a map of photo locations

Demo

See it work.

A 100-second walkthrough, start to finish.

Features

Everything you need to caption your photos.

Four tools, working together — designed natively for macOS.

AI Captions

Google's Gemini analyzes each photo and creates a primary caption plus three alternatives, with scene, landmark, and available person-name context.

Photos Library Browser

Open any folder on your Mac or choose photos directly from your Apple Photos Library. Fast thumbnails, smart selection, and instant previews.

Folder Export

Captions are written directly into EXIF and IPTC metadata, then saved alongside the originals — no proprietary database, no lock-in.

Geotagged Maps

For photos with GPS data, see exactly where they were taken on an interactive map — all rendered locally on your Mac.

Highlights

Every detail, considered.

The full list of what's in the box.

Captions & AI

  • Powered by Google Gemini 3.6 Flash (free tier) or Gemini 3.1 Pro (with billing) for state-of-the-art image understanding
  • One primary caption plus three alternates per photo
  • Landmark recognition with Google Search grounding
  • Person-name embedding from IPTC metadata
  • Multiple language support for generated captions
  • On-device MobileNetV4 fallback when offline or quota-limited
  • Inline caption editor with live preview

Photos & Locations

  • Browse any folder on your Mac or import from the Photos app
  • Fast thumbnail grid with smart selection
  • Interactive map view for geotagged images
  • GPS-verified nearby place lookups via Google Places API (optional)
  • Configurable search radius and place types
  • Supports JPEG, HEIC, PNG, TIFF, and DNG/RAW formats
  • TIFF file creation for proprietary RAW files

Workflow & Export

  • Captions written directly into EXIF and IPTC metadata
  • Batch processing with progress tracking
  • Persistent SQLite cache — re-captioning is free
  • Designed for macOS 15.4 or later
  • Sandboxed, signed, and notarized for the Mac App Store

Additional Features

  • Select detailed location from the settings window
  • Choose between Modified or Original images from the Photos Library
  • Select any segment of the caption and perform a web search
  • If desired, revert to the original caption
  • Re-process any previously processed image with different settings
  • Save all or selected images
  • Image caching option to prevent re-processing the same images
  • Tracking of total number of images processed

Privacy & Pricing

  • Bring your own Google API key — you control your usage
  • API keys stored only in the macOS Keychain, never transmitted to us
  • Zero analytics, zero telemetry, zero trackers
  • Photos never touch our servers — we don't operate any
  • 25-photo free tier, no account required
  • Limited-time $14.99 Pro Unlock (reg. $24.99) — no subscription
  • All future updates included with Pro Unlock

Gallery

A closer look.

Click any image to view it full size.

Available now

Download PhotoCaptioner AI.

Free to download on the Mac App Store. One-time Pro Unlock, no subscriptions.

Download on the Mac App Store