Mylar3 review 2026: free open-source comic book manager for CBR/CBZ libraries, covering watchlists, metadata tagging, download clients, and alternatives.
Category
Automation
Pricing
Open Source, from Free
Verified
Not yet
Last updated
July 19, 2026
WindowsOpen SourceSelf-Hosted
Overview
Mylar3 is a free, open-source tool for automating the collection and organization of digital comic books in CBR and CBZ formats. It is the Python 3 successor to the original 'Mylar' project by developer evilhero, continued as a community fork after the original codebase was archived.
The software is self-hosted, typically run on a home server or in a Docker container, and is maintained by volunteer contributors rather than a commercial company, making it entirely free with no paid tiers.
Key Features
Mylar3's core feature is the watchlist: users add comic series they want tracked, and the software automatically detects and grabs new issues via usenet clients like SABnzbd and NZBGet, or via BitTorrent clients and direct download links.
It also monitors weekly pull lists, tracks story arcs across multiple series, supports trade paperbacks and graphic novels, and automatically applies standardized metadata tags to downloaded files, generating series.json files that other comic-reading applications can use.
Pricing
Mylar3 is entirely free and open source with no subscription plans, paid tiers, or licensing costs. Users only incur costs related to their own hosting hardware and any download services (usenet or torrent) they choose to use alongside it.
Key Features
Series watchlist monitoring — Automatically tracks comic series for new issues and updated information.
Automated grabbing and sorting — Downloads, renames, and sorts issues into an organized library structure.
Pull-list monitoring — Monitors weekly pull lists to catch new releases for watchlisted series.
Story-arc tracking — Tracks and downloads crossover story arcs spanning multiple series.
Automatic metadata tagging — Applies standardized metadata to CBR/CBZ files during or after download.
series.json generation — Generates series information files consumable by third-party comic readers.
Multi-client download support — Works with SABnzbd, NZBGet, many torrent clients, and direct download links.
TPB and graphic novel support — Can find and grab trade paperbacks and graphic novels in addition to single issues.
Pros & Cons
Pros
Completely free and open source
Automates comic collection the way Sonarr/Radarr automate TV and movies
Automatic metadata tagging keeps libraries organized and reader-compatible
Supports both usenet and torrent download clients
Actively maintained community fork with ongoing Python 3 development
Cons
Requires self-hosting and some technical setup (Docker, NAS, or home server)
No official cloud-hosted version
No dedicated company or commercial support behind the project
Documentation is community-maintained and can lag behind development
Relies on third-party download clients and indexers to function fully
Pricing
Mylar3 Free N/A
Frequently Asked Questions
Is Mylar3 free?
Yes, Mylar3 is completely free and open source with no paid tiers.
What file formats does Mylar3 support?
Mylar3 manages comic files in CBR and CBZ formats, including trade paperbacks and graphic novels.
Does Mylar3 need a download client?
Yes, it works alongside usenet clients like SABnzbd and NZBGet or various torrent clients, or via direct download links.
Is Mylar3 the same as the original Mylar?
Mylar3 is the Python 3 community continuation of the original evilhero Mylar project, which is now archived.
Can Mylar3 tag comic metadata automatically?
Yes, it automatically applies metadata to downloaded issues and can generate series.json files for other apps.
Does Mylar3 require self-hosting?
Yes, Mylar3 is a self-hosted application typically run on a home server, NAS, or Docker container.