Binary-parser

lastmod 2026-01-06created 2026-01-061 edits

A JavaScript parser builder for high-performance parsing of binary data

About

• Designed for defining structured binary formats with a declarative chained API, greatly reducing the complexity of writing parsers by hand
• Dynamically generates and compiles parsing code at runtime based on the parser definition, delivering execution performance close to a manual implementation
• Broad support for the core types binary protocols need: integers, floating point, bit fields, strings, arrays, choice, pointer, etc. (user-defined types also possible)
• Can directly express patterns common in network and file format parsing, such as endianness, bit-level fields, and variable-length arrays
• Combining choice and array makes it natural to model TLV (Type-Length-Value) structures
• Supports parsing offset-based formats such as ELF using pointer, seek, saveOffset, etc.
• Recursive tree structures can be parsed via named parsers (namely)
  • However, a termination condition is needed to prevent infinite recursion
• Supports both CommonJS and ESM, optimized for Buffer / Uint8Array-based parsing in Node.js environments
• A library suited to low-level data interpretation tasks such as binary file analysis, network packet parsing, and handling custom binary formats

See also

• JavaScript
• Node.js
• Binary data
• Parser

Favorite site

• GitHub - keichi/binary-parser
• binary-parser - npm
• binary-parser: JavaScript Binary Data Parser Builder | GeekNews