created_at2021-08-14 09:55:49.799246
updated_at2024-04-03 09:46:01.203165
descriptionAn asynchronous ZIP archive reading/writing crate.
Harry (Majored)



async_zip GitHub Workflow Status (branch) GitHub

An asynchronous ZIP archive reading/writing crate.


  • A base implementation atop futures's IO traits.
  • An extended implementation atop tokio's IO traits.
  • Support for Stored, Deflate, bzip2, LZMA, zstd, and xz compression methods.
  • Various different reading approaches (seek, stream, filesystem, in-memory buffer, etc).
  • Support for writing complete data (u8 slices) or streams using data descriptors.
  • Initial support for ZIP64 reading and writing.
  • Aims for reasonable specification compliance.

Installation & Basic Usage

async_zip = { version = "0.0.17", features = ["full"] }

A (soon to be) extensive list of examples can be found under the /examples directory.

Feature Flags

  • full - Enables all below features.
  • full-wasm - Enables all below features that are compatible with WASM.
  • chrono - Enables support for parsing dates via chrono.
  • tokio - Enables support for the tokio implementation module.
  • tokio-fs - Enables support for the tokio::fs reading module.
  • deflate - Enables support for the Deflate compression method.
  • bzip2 - Enables support for the bzip2 compression method.
  • lzma - Enables support for the LZMA compression method.
  • zstd - Enables support for the zstd compression method.
  • xz - Enables support for the xz compression method.


use tokio::{io::BufReader, fs::File};
use async_zip::tokio::read::seek::ZipFileReader;

let mut file = BufReader::new(File::open("./").await?);
let mut zip = ZipFileReader::with_tokio(&mut file).await?;

let mut string = String::new();
let mut reader = zip.reader_with_entry(0).await?;
reader.read_to_string_checked(&mut string).await?;

println!("{}", string);


use async_zip::tokio::write::ZipFileWriter;
use async_zip::{Compression, ZipEntryBuilder};
use tokio::fs::File;

let mut file = File::create("").await?;
let mut writer = ZipFileWriter::with_tokio(&mut file);

let data = b"This is an example file.";
let builder = ZipEntryBuilder::new("bar.txt".into(), Compression::Deflate);

writer.write_entry_whole(builder, data).await?;


Whilst I will be continuing to maintain this crate myself, reasonable specification compliance is a huge undertaking for a single individual. As such, contributions will always be encouraged and appreciated.

No contribution guidelines exist but additions should be developed with readability in mind, with appropriate comments, and make use of rustfmt.

Issues & Support

Whether you're wanting to report a bug you've come across during use of this crate or are seeking general help/assistance, please utilise the issues tracker and provide as much detail as possible (eg. recreation steps).

I try to respond to issues within a reasonable timeframe.

Commit count: 447

cargo fmt