Piwigo

Piwigo is an open-source web application for managing, organizing and sharing large photo collections. It provides album hierarchies, user and permission management, extensible plugins and themes, and tools for batch processing and metadata handling.

Key Features

• Scales to large libraries with on-demand multiple-size image generation and cache management
• Albums hierarchy with unlimited depth; images can belong to multiple albums
• Batch manager for bulk operations (tags, album assignment, authors, geolocation)
• Role/group-based permissions, individual user management and activity/history tracking
• Extensible via hundreds of plugins and themes (gallery, slideshow, metadata, maps, etc.)
• Web API (HTTP/JSON) for integrations (upload, search, thumbnails, third-party tools)
• Mobile apps and upload paths (web upload, FTP, desktop apps, mobile clients)
• Support for image metadata (EXIF/IPTC), geolocation, and various image libraries (GD/ImageMagick)

Use Cases

• Internal image library for organizations requiring per-user access controls and versioned galleries
• Photographer portfolios and client-proofing portals with private albums and batch workflows
• Media cataloging and digital-asset workflows that need metadata import/export and API integration

Limitations and Considerations

• Requires a PHP-enabled web host and a MySQL/MariaDB database; recent Piwigo releases expect modern PHP (8.x)
• Some optional features require extra tools (exiftool for advanced metadata, ffmpeg for video posters) or server tuning for very large installations
• Plugin compatibility can vary between major Piwigo versions; migrations may require testing

Piwigo is a mature, community-driven gallery platform focused on flexibility and performance for large photo collections. It is extensible through themes and plugins and provides developer APIs for integrations and automation.