ExifReader is a mature, well-maintained JavaScript library for extracting metadata from image files. It supports a wide range of image formats including JPEG, TIFF, PNG, HEIC, AVIF, WebP, GIF, and JPEG XL. The library parses EXIF, IPTC, XMP, ICC profiles, JFIF, MPF, Photoshop, and camera maker notes (Canon, Pentax). It is designed for both browser and Node.js environments, with a modular architecture that allows custom builds via tree-shaking and feature flags to reduce bundle size. The library exposes a promise-based API (`load()` and `loadView()`) and includes advanced features like adaptive partial file loading (`length: 'auto'`), tag filtering, thumbnail extraction, and comprehensive metadata range reporting. Security is a strong focus: bounds checks, value budgeting, and protection against crafted/malformed files are present throughout the parsers.