Clone this repo:
  1. 07ffd98 Switch to 'test' package by Brendan Duncan · 3 years, 10 months ago master
  2. 7c0f44c 1.0.20 by Brendan Duncan · 3 years, 10 months ago
  3. 4f347df Code cleanup by Brendan Duncan · 3 years, 10 months ago 1.0.20
  4. 390c59b Pre-allocate output buffer when decompressing zip contents by Brendan Duncan · 3 years, 10 months ago
  5. 1127886 disable default verifcation for zlib and gzip by Brendan Duncan · 4 years, 1 month ago


Build Status


A Dart library to encode and decode various archive and compression formats.

The library has no reliance on dart:io, so it can be used for both server and web applications.

The archive library currently supports the following decoders:

  • Zip (Archive)
  • Tar (Archive)
  • ZLib [Inflate decompression]
  • GZip [Inflate decompression]
  • BZip2 [decompression]

And the following encoders:

  • Zip (Archive)
  • Tar (Archive)
  • ZLib [Deflate compression]
  • GZip [Deflate compression]
  • BZip2 [compression]


Extract the contents of a Zip file, and encode the contents as a BZip2 compressed Tar file:

import 'dart:io' as Io;
import 'package:archive/archive.dart';
void main() {
  // Read the Zip file from disk.
  List<int> bytes = new Io.File('').readAsBytesSync();
  // Decode the Zip file
  Archive archive = new ZipDecoder().decodeBytes(bytes);
  // Extract the contents of the Zip archive to disk.
  for (ArchiveFile file in archive) {
    String filename =;
    List<int> data = file.content;
    new Io.File('out/' + filename)
          ..createSync(recursive: true)
  // Encode the archive as a BZip2 compressed Tar file.
  List<int> tar_data = new TarEncoder().encode(archive);
  List<int> tar_bz2 = new BZip2Encoder().encode(tar_data);
  // Write the compressed tar file to disk.
  Io.File fp = new Io.File(filename + '.tbz');