s-rah

    s-rah/onionscan

    OnionScan is a free and open source tool for investigating the Dark Web.

    backend
    Go
    NOASSERTION
    3.3K stars
    628 forks
    3.3K GitHub watchers
    Updated Oct 26, 2026
    View on GitHub

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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    The project lists 9 contributors on GitHub.

    Gained 24% fewer stars in the last 90 days than in the 90 days before.

    Use Cases & Benefits

    • Investigates Dark Web hidden services to identify operational security issues and misconfigurations.
    • Enables operators and researchers to detect privacy leaks and security flaws without breaking underlying anonymity systems.
    • Use for auditing and improving the security of your own Tor hidden service to prevent accidental data leaks.
    • Use for researchers tracking and monitoring multiple Dark Web sites to discover identity correlations and security risks.
    • Use for investigators needing detailed, configurable scans and JSON reports to integrate Dark Web analysis into other tools.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    Other

    GitHub could not identify this license; read the LICENSE file before depending on it.

    Community files

    • README: present
    • Contributing guide: present

    Watch-outs

    • License not identified by GitHub; read the LICENSE file before depending on it.
    • Warning: No commits in over a year (last push Aug 2024).

    General guidance from repository metadata, not legal advice. How we score

    From the README

    OnionScan is a free and open source tool for investigating the Dark Web. For all the amazing technological innovations in the anonymity and privacy space, there is always a constant threat that has no effective technological patch - human error.

    Whether it is operational security leaks or software misconfiguration - most often times the attacks on anonymity don't come from breaking the underlying systems, but from ourselves.

    issues with their services**. We want to help them detect misconfigurations and we want to inspire a new generation of anonymity engineering projects to help make the world a more private place.

    In fact we want to make this as easy as possible. Not because we agree with the goals and motives of every investigation force out there - most often we don't. But by making these kinds of investigations easy, we hope to create a powerful incentive for new anonymity technology (see goal #1)

    OnionScan requires either Go 1.6 or 1.7.

    In order to install OnionScan you will need the following dependencies not provided by the core go standard library:

    See the wiki for guidance.

    Excerpt from the s-rah/onionscan README on GitHub (NOASSERTION license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Forks

    628-3

    Open issues

    86+0

    Compared with peers in Backend

    Fastest-growing repositories GStars tracks in this cohort for the week of Nov 1, by 7-day star growth

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