FastWARC

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library 0.16.0 ·python
verified May 23, 2026

FastWARC is a high-performance Python library for parsing WARC (Web ARChive) files, written in C++/Cython. It supports WARC/1.0 and WARC/1.1 streams with GZip and LZ4 compression, offering significant speed improvements over pure Python alternatives like WARCIO. FastWARC is part of the ChatNoir Resiliparse toolkit and is currently at version 0.16.0, with active development.

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