file-type

Tech stack & purpose

The file-type package is a JavaScript library that detects binary file formats by examining magic numbers—the distinctive byte signatures at the beginning of files. It works with files, streams, and data buffers in Node.js and browser environments, supporting detection of numerous modern binary formats like PNG, JPEG, MP3, and many others. The package is built as an ESM module for JavaScript and TypeScript and provides multiple detection methods including `fileTypeFromFile()`, `fileTypeFromBuffer()`, `fileTypeFromStream()`, and `fileTypeFromBlob()`, along with support for custom detectors and tokenizer-based approaches for advanced use cases like HTTP range requests and Amazon S3 access.

Community & reference links

• `3mf`
• `3g2`
• `3gp`
• `7z`
• `ace`
• `amr`
• `indd`
• `psd`
• `aac`
• `asf`
• `alias`
• `avro`
• `parquet`
• `apk`
• `apng`
• `dmg`
• `icns`
• `arj`
• `ar`
• `aif`
• `avi`
• `avif`
• `bmp`
• `bz2`
• `cab`
• `cfb`
• `cpio`
• `deb`
• `dcm`
• `dng`
• `dwg`
• `eot`
• `eps`
• `epub`
• `exe`
• `elf`
• `fbx`
• `flac`
• `flv`
• `flif`
• `gif`
• `tar.gz`
• `ics`
• `icc`
• `ico`
• MIME type
• `jar`
• `class`
• `jmp`
• `jpg`
• `jpx`
• `jxl`
• `jxr`
• `key`
• `lzh`
• `xltx`
• `ppsx`
• `jls`
• `lz4`
• `lz`

Languages

Contributors (top 30 of 120)

• Sindre Sorhus301 commits
• Borewit139 commits
• Kevin Martensson13 commits
• Mikael Finstad8 commits
• Karl Hiramoto8 commits
• Sylvain Mina7 commits
• Kevin Mårtensson6 commits
• Yanis Benson6 commits
• Matthew McEachen5 commits
• Ben Brook4 commits
• Richie Bendall4 commits
• Arthur Verschaeve4 commits
• Daniel Freire4 commits
• Ryo Ota3 commits
• Adam Lynch3 commits
• Jacek Symonowicz3 commits
• menglingjun2 commits
• Bjorn Stromberg2 commits
• t1st32 commits
• Nicolas Leclerc2 commits
• Dimitri Benin2 commits
• 
  Alex2 commits · 18 followers
• Andreas Gillström2 commits
• hemanth.hm2 commits
• Lingjun.Meng2 commits
• Shinnosuke Watanabe2 commits
• 1000ch2 commits
• Tom MacWright2 commits
• Igor W2 commits
• Cătălin Mariș2 commits