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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


Extract the contents of a Zip file, and encode the contents into a Tar file:

import 'dart:io' as Io;
import 'package:archive/archive.dart';
void main() {
  // Read the Zip file from disk.
  Io.File file = new Io.File('');
  List<int> bytes = file.readAsBytesSync();
  if (bytes == null) {
  // Decode the Zip file
  Archive archive = new ZipDecoder().decodeBytes(bytes);
  // Extract the contents of the Zip archive to disk.
  for (int i = 0; i < archive.numberOfFiles(); ++i) {
    String filename = archive.fileName(i);
    List<int> data = archive.fileData(i);
    Io.File fp = new Io.File('out/' + filename);
    fp.createSync(recursive: true);
  // Encode the archive as a Tar file.
  List<int> tar_data = new TarEncoder().encode(archive);
  // Write the tar file to disk.
  Io.File fp = new Io.File(filename + '.tar');
  fp.createSync(recursive: true);