If you're already using archive-chan, you're using one of the better thread-level archivers for creating a self-contained copy (HTML + JSON + images + CSS/JS). It was created as a maintained fork of BASC-Archiver after the original stopped keeping up with changes to 4chan's infrastructure. PyPI+1

Other notable tools fall into a few categories:

For individual thread hoarding

These are the ones I'd recommend today:

• archive-chan (your current choice)

  • Saves HTML exactly as viewed

  • Downloads original images and thumbnails

  • Stores JSON

  • Can follow live threads until 404

  • Produces a static archive you can host locally or on a web server. PyPI

• Custom scripts using the official JSON API

  • Many people write their own Python or Go archivers using the 4chan JSON API because it's fairly simple.

  • This gives maximum control (incremental updates, SQLite databases, deduplication, WARC output, etc.).

For archiving entire boards

If you're interested in preserving everything from a board rather than a few threads:

• Asagi is still the classic backend.

• FoolFuuka is the frontend most public archive sites run on top of it.

• These continuously poll boards, store posts in a database, and preserve images before threads disappear. archive.ph

Less common projects

There are a handful of smaller or specialized projects:

• 4chan-archiver (GitHub project) — lightweight Python downloader with fewer features than archive-chan. Reddit

• 4TCT — an academic data collection tool aimed at research rather than preserving full web pages or images. arXiv

If you're a serious data hoarder

A setup I'd personally choose would be:

• archive-chan for important individual threads

• A small SQLite database to index archived threads

• Image deduplication (by SHA-256 or perceptual hash)

• Periodic compression (e.g. zstd)

• Git for metadata and JSON only (not images)

• WARC generation if long-term preservation is a goal

That gives you archives that remain browsable even if 4chan changes its frontend again.

If you're looking for something more advanced than archive-chan, I can also recommend modern archival workflows (using yt-dlp-style metadata management, WARC, deduplication, and indexing) that many people in the data-hoarding community use today.