WebMinCer

WebMinCer is a minifier for UTF-8 CSS, JavaScript, XML, HTML and JSON, written in C. It can also minify inline scripts, stylesheets and JSON data embedded in XML and HTML markup. JSON input is validated completely. For the other formats, many, though not all, classes of syntax errors are detected. When invalid input is recognized, precise error messages are printed.

The original and actively developed project is hosted on Codeberg.
Pre-built binary releases are also available on Codeberg.
Additionally this project is also mirrored on GitHub.

The name WebMinCer is a play on web, minification, and C, as well as the word mincer. The name reflects the tool's purpose: it effectively feeds web-language source files through a virtual mincer to produce compact output.

Design objectives

Released as single binary with no dependencies except libc.
Easy to build with a simple make invocation.
The only build requirements are a POSIX shell environment, make and a modern C compiler (clang recommended, gcc possible as well, others might work).
It is not intended to provide bindings for scripting languages.
Also minify inline CSS, JavaScript and JSON in HTML and XML documents.
Extensive unit testing of all features.
Produce standards-conformant output from any standards-conformant input.
The program should fail on syntax errors and must not attempt to fix them.
This minifier is not a cleaner. It should not modify the semantics of the markup.

Documentation

Technical details about the current minifiers and their scope are documented in Minification.
Usage documents the command-line interface.
Download lists the available binary releases.
Feedback explains how to report bugs and request features.
Development covers building, tests, and development utilities.

Building and testing

WebMinCer uses a small Makefile with separate targets for optimized, debug, and test builds.

make or make build builds the optimized binary at .build/webmincer.
make debug builds a debug binary at .build/debug/webmincer.
make test builds the optimized binary and runs all test scripts against .build/webmincer.
make bench runs the optimized test suite with benchmarking enabled. See Tests for details.
make test-debug builds the debug binary and runs all test scripts against .build/debug/webmincer.
make clean removes the entire .build directory.
make test-clean removes the persistent .test test-data directory.
make deploy-clean removes the entire .deploy directory.
make clean-all removes .build, .test, and .deploy.

Object files are written to .build/obj for optimized builds and to .build/debug/obj for debug builds.

Build requirements are a POSIX shell environment, make, and a modern C compiler. The build uses the cc command by default, but you can override it, for example with make CC=clang or make CC=gcc.

Pre-built releases

Pre-built releases are available from the Codeberg release page. Download the binary archive for your operating system and processor architecture.

Linux x86: 32-bit i686. Download WebMinCer_1.0_Linux_x86.tar.xz, or WebMinCer_1.0_Linux_x86-static.tar.xz for a self-contained build.
Linux x64: 64-bit x86_64. Download WebMinCer_1.0_Linux_x86_64.tar.xz, or WebMinCer_1.0_Linux_x86_64-static.tar.xz for a self-contained build.
Linux arm64: 64-bit ARM. Download WebMinCer_1.0_Linux_aarch64.tar.xz, or WebMinCer_1.0_Linux_aarch64-static.tar.xz for a self-contained build.
macOS x64: Intel Macs. Download WebMinCer_1.0_macOS_x86_64.tar.xz.
macOS arm64: Apple silicon Macs. Download WebMinCer_1.0_macOS_aarch64.tar.xz.
macOS universal: Intel and Apple silicon Macs. Download WebMinCer_1.0_macOS_universal.tar.xz.
Windows x64: 64-bit x86_64 systems. Download WebMinCer_1.0_Windows_x86_64.zip.
Windows arm64: 64-bit ARM systems. Download WebMinCer_1.0_Windows_aarch64.zip.

Linux and macOS archives use the .tar.xz format. Windows archives use the .zip format. Binary archives contain the release binary and a copy of LICENSE. Static Linux archives have -static in their names and do not require a system glibc installation.

Developer archives have names such as webmincer_dev_1.0_x86_64-linux-gnu.tar.xz. They include the release binary, debugging symbols, build information, and a copy of LICENSE for developers who need them.

Origins and relationship to cminify

WebMinCer started as a fork of cminify, the minifier originally developed by Jumping-Beaver (aka Lerchensporn). The original project and its design rationale are preserved in the original cminify README.

We are grateful to Jumping-Beaver for the substantial work that made this project possible. WebMinCer builds on that foundation, while its goals may differ slightly from those of cminify and it is intended to be developed more actively.