(For instructions for Windows or Rust, see sections below.)
To get the code:
git clone --recursive https://github.com/kornelski/pngquant.git
You will need libpng installed with development headers.
On Linux install
libpng-dev package. On macOS
brew install libpng.
There's an optional
./configure step (see sections below). Run:
It will create
pngquant executable in the current directory. If you'd like
to install it system-wide:
sudo make install
By default it will be installed in
/usr/local/bin. To install it in another
./configure --prefix=dir && make.
pngquant uses GNU Makefile. To compile on FreeBSD you will need to use
Avoid Linux distros that ship with libpng 1.2. It is old and buggy. libpng 1.6 or later is required.
Extract libpng source code as a subdirectory of pngquant source directory.
Build static libpng (
./configure --enable-static && make), and then
./configure && make pngquant.
Install Rust 1.36 or later: https://www.rust-lang.org/install.html
On Windows also install msys-git and Visual C++ Build Tools with Windows 8 SDK enabled, and reboot.
Get the code:
# Unix version git clone --recursive https://github.com/kornelski/pngquant.git # Windows version git clone -b msvc --recursive https://github.com/kornelski/pngquant.git
And then build:
cd pngquant cargo build --release
This will create executable in
You can build with additional features:
cargo build --release --features=sse,lcms2
The features are:
sse— enable use of SSE on x86 CPUs.
lcms2— compile with support for color profiles via Little CMS.
lcms2-static— same, but link statically.
cocoa— compile with support for color profiles via macOS Cocoa.
openmp— use OpenMP to accelerate conversion. Requires GCC (not Clang).
openmp-static— same, but link statically.
cargo build --release --features=openmp # or cargo build --release --features=openmp-static
On macOS you may need to install gcc (
brew install gcc) and run
export CC=gcc-9 first,
because clang doesn't support OpenMP (yet).
macOS version can use Cocoa to read images. This adds support for color profiles and other image formats as input. However, it also disables support for preserving PNG metadata.
cargo build --release --features=cocoa
Little CMS library is used by default.
It's linked dynamically if
pkg-config is working (e.g. install
Otherwise uses static build as a fallback.
export LCMS2_STATIC=1 or build
--features=lcms2-static to force static linking.
If you want to use pngquant's conversion algorithm without loading/saving PNG
files, then you can run
cargo build --release in the
The library doesn't need libpng nor zlib.
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