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A streaming compression/decompression library for Rust. The underlying implementation by default uses miniz but can optionally be configured to use the system zlib, if available.

Supported formats:

  • deflate
  • zlib
  • gzip
# Cargo.toml
flate2 = "0.2"

Using zlib instead of miniz:

flate2 = { version = "0.2", features = ["zlib"], default-features = false }


extern crate flate2;

use std::io::prelude::*;
use flate2::Compression;
use flate2::write::ZlibEncoder;

fn main() {
    let mut e = ZlibEncoder::new(Vec::new(), Compression::Default);
    let compressed_bytes = e.finish();


extern crate flate2;

use std::io::prelude::*;
use flate2::read::GzDecoder;

fn main() {
    let mut d = GzDecoder::new("...".as_bytes()).unwrap();
    let mut s = String::new();
    d.read_to_string(&mut s).unwrap();
    println!("{}", s);


flate2-rs is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, and LICENSE-MIT for details.