Wuffs is a memory-safe programming language and toolchain for writing parsers and codecs, with C code generation as its primary output. The system provides a comprehensive library of decoders for image formats (JPEG, PNG, GIF, BMP, WebP, etc.), compression formats (Deflate, Zlib, Gzip, LZMA, XZ, BZip2, etc.), and checksums (CRC32, Adler32, SHA256). It is designed to eliminate buffer overflows, integer overflows, and null pointer dereferences at compile time through formal verification and interval arithmetic, without runtime overhead. The architecture consists of a custom DSL (Wuffs language) with a Go-based compiler (parser, type checker, optimizer), a C code generator that produces a single-file header-only C library, and a set of auxiliary C++ modules for high-level APIs. Key entry points include the `wuffs` CLI tool for managing packages and generating C code, the `wuffs-c` tool for C-specific operations, and the generated `wuffs-unsupported-snapshot.c` file that can be dropped into any C project. External dependencies are minimal: the development toolchain requires Go, but the generated C library has no dependencies beyond standard C. The system is used in production (e.g., GIF decoder in Google Chrome) and is benchmarked as 1.3–6× faster than equivalent C libraries.
UTIF.js is a comprehensive, single-file JavaScript library for decoding and encoding TIFF, EXIF, DNG, CR2, NEF, and other TIFF-based image formats. It is the primary TIFF library used by the Photopea online image editor. The library handles a wide variety of compression schemes (JPEG, LZW, PackBits, Fax, Deflate, Nikon, Panasonic, etc.) and supports various bit depths, color spaces, and photometric interpretations. It provides a straightforward API: `UTIF.decode()` for parsing TIFF headers, `UTIF.decodeImage()` for decompressing pixel data, and `UTIF.toRGBA8()` for converting to RGBA. The code is monolithic, embedding its own JPEG decoder and many other decoders directly in a single file. While functional and battle-tested, the code is dense, uses ES5 patterns, and contains many minified-like variable names, making it less readable and maintainable. The library depends on the outdated `pako` v1.x for deflate compression. It is a mature, production-ready library but with medium technical drift and a maintenance status that appears active (last commit dated 2026-05-04, though this date is likely a mistake).