NodeJsScan

NodeJsScan is a source-code security scanner built specifically for Node.js applications. It is best for development and DevSecOps teams comfortable operating self-hosted tools on Linux or macOS. The trade-off is clear: you get unusually adaptable scanning and reporting at no license cost, but deployment and upkeep remain your responsibility.

Overview

NodeJsScan combines the libsast and Semgrep engines to inspect Node.js application code for security issues. You can run scans from the command line, call them through the Python API exposed by njsscan, or use the local web interface at http://127.0.0.1:9090. That mix suits scripted developer workflows as well as teams that want a browser view without sending source to a hosted service.

Its .njsscan configuration file is a meaningful advantage for teams with established policies. It can select file types, ignore paths or rules, filter severities, and override severity levels. The cost of that control is operational ownership: your team must deploy, update, and secure the scanner itself.

Key features

• Actionable export choices: The CLI produces JSON, SARIF 2.1.0, SonarQube, DefectDojo, GitLab SAST, and HTML. Teams can feed findings into existing code-review, defect-tracking, and security systems instead of adapting to a single report format.
• CI/CD and pull-request workflows: Documented integrations include GitHub Actions, GitHub Code Scanning, GitLab CI/CD, Travis CI, and CircleCI. This makes NodeJsScan a sensible fit when security checks must run alongside builds or proposed changes.
• Notifications: Slack alerts use a webhook URL, while email alerts use SMTP settings. These are useful for routing findings to an engineering channel or mailbox, although they still require your own messaging infrastructure.
• Self-hosted deployment: The project documents both a prebuilt Docker image and local Docker builds. Docker can simplify repeatable pipeline setup, but neither option removes responsibility for host security and maintenance.

Pricing

Plan	Price	Includes
NodeJsScan	free	Open source; self-hosted; Docker or local setup

There is no paid tier, free trial, seat allowance, or usage quota to weigh against the free plan. The economic benefit is strongest for teams that already have Linux or macOS build infrastructure and can absorb maintenance. “Free” does not mean managed: hosting, upgrades, pipeline administration, and support are yours to handle. The repository identifies a GPL-3.0 license and invites support through PayPal donations or sponsorship.

Platforms

NodeJsScan is offered as an API, Linux and macOS software, a self-hosted deployment, and a web interface running locally. The current njsscan package requires Python 3.10 or newer. Version 4 onward dropped Windows support, so Windows-only teams should look elsewhere or provide a compatible Linux/macOS environment.

Who it's for

This is aimed at teams building Node.js applications that want source scanning embedded in CI/CD or broader DevSecOps pipelines. It is particularly suitable when pull-request checks, configurable severities, and machine-readable reports matter more than a vendor-hosted console. It is less suitable for organizations seeking a managed service, Windows-native operation, or vendor-backed maintenance.

Pros and cons

Pros

• Open-source and free: There is no subscription cost or trial expiry, making broad internal adoption feasible.
• Flexible automation: CLI, Python API, pull-request scanning, and documented integrations cover both developer scripts and delivery pipelines.
• Broad reporting: Six named output families reduce integration work with common security and quality systems.
• Policy control: File, path, rule, and severity settings let teams tune noise to their codebase.

Cons

• Platform constraint: Python 3.10+ and the loss of Windows support narrow where it can run.
• Self-hosting burden: Deployment, upgrades, infrastructure security, and availability are not outsourced.
• Node.js focus: It is a specialized choice rather than a general multi-language application scanner.

Alternatives

Snyk Open Source is the better choice when you need Windows support, a web platform, or a freemium service with a Free plan capped at five projects and monthly billing.

Choose MobSF instead for a broader open-source framework spanning Linux, macOS, Windows, web, API, and self-hosted use; its Professional plan costs $2,999.99 a year.

Semgrep Code suits teams wanting a paid platform with a Free Edition covering Code and Supply Chain for up to 10 repositories and 10 contributors.

NaiveSystems Analyze is an alternative freemium analyzer with some open-source components and on-premises deployment.

Flawfinder is a free GPL-2.0+ option for teams seeking a different open-source security checker.

Bandit is free Apache-licensed software for its supported scanning use case.

gosec is a free Apache-licensed Go security checker.

Security Code Scan is a free, open-source static analyzer for .NET, making it the relevant alternative for that ecosystem.

Verdict

Choose NodeJsScan if you need a no-cost, configurable Node.js scanner that can run in your own Linux or macOS pipelines and emit results in established security formats. Look elsewhere if you require Windows support, a managed service, or coverage beyond Node.js without taking on self-hosting work.