Best Code Quality Tools for JavaScript
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Compare the Top Code Quality Tools that integrate with JavaScript as of February 2026
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This a list of Code Quality tools that integrate with JavaScript. Use the filters on the left to add additional filters for products that have integrations with JavaScript. View the products that work with JavaScript in the table below.
What are Code Quality Tools for JavaScript?
Code quality tools help development teams analyze, maintain, and improve the reliability, readability, and security of source code. They automatically scan codebases to detect bugs, vulnerabilities, code smells, and deviations from coding standards. The tools often provide actionable feedback, metrics, and reports to guide refactoring and best practices. Many code quality tools integrate with IDEs, version control systems, and CI/CD pipelines for continuous assessment. By improving code consistency and reducing technical debt, code quality tools support faster development and more stable software. Compare and read user reviews of the best Code Quality tools for JavaScript currently available using the table below. This list is updated regularly.
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1
Aikido Security
Aikido Security
Ship quality code, faster. Aikido built AI-native code quality, with instant feedback, smart detection, and clear auto-generated PR comments, so you can focus on building.Starting Price: Free -
2
Kiuwan Code Security
Kiuwan
Kiuwan is an end-to-end application security platform that integrates seamlessly into your development process. Our toolset includes Static Application Security Testing (SAST), Software Composition Analysis (SCA), Software Governance and Code Quality, empowering your team to quickly identify and remediate vulnerabilities. Integrating into your CI/CD pipeline, Kiuwan enables early detection and remediation of security issues. Kiuwan supports strict compliance with industry standards including OWASP, CWE, MISRA, NIST, PCI DSS, and CERT, among others. ✅ Large language support: 30+ programming languages. ✅ Detailed action plans: Prioritize remediation with tailored action plans. ✅ Code Security: Seamless Static Application Security Testing (SAST) integration. ✅ Insights: On-demand or continuous scanning Software Composition Analysis (SCA) to help reduce third-party threats. ✅ One-click Software Bill of Materials (SBOM) generation Code Smarter. Secure Faster. Ship Sooner. -
3
Codespy
Codespy
Codespy AI Detector is a powerful tool designed to identify AI-generated code within software projects quickly and accurately. It supports popular programming languages such as Java, Python, JavaScript, C++, C#, and PHP. The platform helps developers find AI-written code from models like ChatGPT, Gemini, and Claude, which can introduce bugs or unexpected errors. Codespy integrates seamlessly with common development environments like Visual Studio Code and is available as a ChatGPT plugin. Its technology enables teams to create processes and guardrails around AI code usage to reduce risk and improve code quality. With simple pricing plans and no credit card required for the free tier, Codespy is accessible to individuals and businesses of all sizes.Starting Price: $27.98/month -
4
SonarQube Server
SonarSource
SonarQube Server is a self-managed solution for continuous code quality inspection that helps development teams identify and fix bugs, vulnerabilities, and code smells in real-time. It provides automated static code analysis for a variety of programming languages, ensuring the highest quality and security standards are maintained throughout the development lifecycle. SonarQube Server integrates seamlessly with existing CI/CD pipelines, offering flexibility for on-premise or cloud-based deployment. With advanced reporting features, it helps teams manage technical debt, track improvements, and enforce coding standards. SonarQube Server is ideal for organizations seeking full control over their code quality and security without compromising on performance. -
5
CodeScene
CodeScene
CodeScene is a code analysis, visualization, and reporting tool. Cross reference contextual factors such as code quality, team dynamics, and delivery output to get actionable insights to effectively reduce technical debt and deliver better code quality. We enable software development teams to make confident, data-driven decisions that fuel performance and developer productivity. Supporting 28+ programming languages, CodeScene also offers an automated integration with GitHub, BitBucket, Azure DevOps or GitLab pull requests to incorporate the analysis results into existing delivery workflows. Automate your code reviews, get early warnings and recommendations about complex code before merging it to the main branch and set quality gates to trigger in case your code health declines.Starting Price: €18 per active author/month -
6
Codecov
Codecov
Develop healthier code. Improve your code review workflow and quality. Codecov provides highly integrated tools to group, merge, archive, and compare coverage reports. Free for open source. Plans starting at $10/user per month. Ruby, Python, C++, Javascript, and more. Plug and play into any CI product and workflow. No setup required. Automatic report merging for all CI and languages into a single report. Get custom statuses on any group of coverage metrics. Review coverage reports by project, folder and type test (unit tests vs integration tests). Detailed report commented directly into your pull request. Codecov is SOC 2 Type II certified, which means a third-party audits and attests to our practices to secure our systems and your data.Starting Price: $10 per user per month -
7
Stickler CI
Stickler
Align your team's code reviews with automatic style feedback, for all the languages you use, all in one place. Connecting your repository is a couple of clicks away and our reviews finish in record time. Use the default style guides or customize each tool to fit your team's tastes. Use auto fixing to correct your team's style errors so you can focus on feedback. Stickler CI only keeps your code on our servers for the duration of a review. After the comments for a review are posted your code is removed from our servers. Incrementally improve and standardize the quality of your code in each pull request. Ensure your coding standards are applied consistently as code changes without having to disrupt your team. Make sure your code quality and style are standardized by automatically applying style and quality checking tools. Either use the defaults or customize linters to fit your existing coding standards.Starting Price: $15 per month -
8
AppMap
AppMap
Runtime code reviews for every code change in the code editor and in CI. Catch runtime performance, security, and stability problems while you code, before they hit production. Collaborate on a team member’s application behavior problem without having to replicate their environment. Automate AppMap generation in CI, get alerts for performance and security flaws, and compare observability and alerts across branches and teams. Run AppMap in CI to automate observability, create OpenAPI docs, and much more. AppMap code reviews link to rich resources that enable you to uncover the root causes of unexpected behavior. Sequence diagrams diffs vividly showcase behavioral changes in your code.Starting Price: $15 per user per month -
9
PullRequest
HackerOne
Get on-demand code reviews from vetted, expert engineers enhanced by AI. Add senior engineers to your team every time you open a pull request. Ship better, more secure code faster with AI-assisted code reviews. Whether you're a development team of 5 or 5,000, PullRequest will supercharge your existing code review process and adapt to your needs. Our reviewers will help your team catch security vulnerabilities, find hidden bugs, and fix performance issues before they reach production. All of this is done within your existing tools. Expert human reviewers enhanced by an AI analysis to pinpoint high-risk security hotspots. Intelligent static analysis combining open source tools and proprietary AI shown to reviewers for deeper insights. Save your senior staff some time. Make meaningful progress resolving issues and improving code while other members of your team are busy building.Starting Price: $129 per month -
10
Early
EarlyAI
Early is an AI-driven tool designed to automate the generation and maintenance of unit tests, enhancing code quality and accelerating development processes. By integrating with Visual Studio Code (VSCode), Early enables developers to produce verified and validated unit tests directly from their codebase, covering a wide range of scenarios, including happy paths and edge cases. This approach not only increases code coverage but also helps identify potential issues early in the development cycle. Early supports TypeScript, JavaScript, and Python languages, and is compatible with testing frameworks such as Jest and Mocha. The tool offers a seamless experience by allowing users to quickly access and refine generated tests to meet specific requirements. By automating the testing process, Early aims to reduce the impact of bugs, prevent code regressions, and boost development velocity, ultimately leading to the release of higher-quality software products.Starting Price: $19 per month -
11
Fynix
Fynix
Fynix is an AI-powered platform designed to boost software development productivity through intelligent coding assistance and agent-based code reviews. It integrates directly into popular IDEs like VS Code and offers features such as context-aware autocomplete, natural language commands for code fixes and translations, and automatic code flow visualizations. Fynix’s Code Assistant helps developers write cleaner, more efficient code faster, while its upcoming Code Quality Agent will automate bug detection and enforce coding standards. With support for multiple programming languages and frameworks, and integrations with tools like Jira, Fynix is a versatile platform for improving coding efficiency and collaboration.Starting Price: Free -
12
Sourcery
Sourcery
Sourcery is an AI-powered automated code review and coding assistant designed to help developers and engineering teams improve code quality, catch bugs and security issues early, and maintain consistent standards across projects. It integrates directly into popular development workflows, including GitHub, GitLab, and IDEs like VS Code and JetBrains, providing instant, actionable feedback on pull requests and in-editor code changes rather than relying solely on traditional peer reviews. Sourcery analyzes diffs with a combination of large language model insights and static analysis to deliver clear summaries, line-by-line suggestions, high-level feedback, and visual diagrams that explain proposed changes, with the goal of offering review quality similar to what a colleague would provide. In the IDE, it functions as a real-time pair programmer that underlines potential improvements, enables one-click application of suggested fixes, and offers an AI chat.Starting Price: $12 per month -
13
SonarQube Cloud
SonarSource
Maximize your throughput and only release clean code SonarQube Cloud (formerly SonarCloud) automatically analyzes branches and decorates pull requests. Catch tricky bugs to prevent undefined behavior from impacting end-users. Fix vulnerabilities that compromise your app, and learn AppSec along the way with Security Hotspots. With just a few clicks you're up and running right where your code lives. Immediate access to the latest features and enhancements. Project dashboards keep teams and stakeholders informed on code quality and releasability. Display project badges and show your communities you're all about awesome. Code Quality and Code Security is a concern for your entire stack, from front-end to back-end. That’s why we cover 24 languages including Python, Java, C++, and many others. Transparency makes sense and that's why the trend is growing. Come join the fun, it's entirely free for open-source projects! -
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Klocwork
Perforce
Klocwork static code analysis and SAST tool for C, C++, C#, Java, and JavaScript identifies software security, quality, and reliability issues helping to enforce compliance with standards. Built for enterprise DevOps and DevSecOps, Klocwork scales to projects of any size, integrates with large complex environments, a wide range of developer tools, and provides control, collaboration, and reporting for the entire enterprise. This has made Klocwork the preferred static analyzer that keeps development velocity high while enforcing continuous compliance for security and quality. Use Klocwork static application security testing (SAST) for DevOps (DevSecOps). Our security standards identify security vulnerabilities, helping to find and fix security issues early and proving compliance to internationally recognized security standards. Klocwork integrates with CI/CD tools, containers, cloud services, and machine provisioning making automated security testing easy. -
15
SonarQube for IDE
SonarSource
Easy to use, no configuration needed — just install from your favorite IDE marketplace and continue to code while SonarQube for IDE (formerly SonarLint) does its job. Your current linting tools may come with overhead – specialized tools for languages or longer setup and config time. With SonarQube for IDE, you can settle on a single solution to address your Code Quality and Code Security issues. We have you covered with hundreds of unique, language-specific rules to catch Bugs, Code Smells, and Security Vulnerabilities right in the IDE, as you code. From dangerous regex patterns to non-compliant coding standards, SonarQube for IDE is your true confidante in delivering error-free code. With an intelligent tool by your side, your mistakes are only visible to you so you can understand them, quickly remediate them, and learn along the way. -
16
CodeFactor
CodeFactor
Get a glance at code quality for the whole project, recent commits, and the most problematic files. CodeFactor will track new and fixed issues for every commit and pull request. CodeFactor will try to show the most critical issues first based on issue code size, file change frequency, and file size so you can start fixing only what's important. Create and track issues or comments directly from code files or project issues pages. CodeFactor will update the status for GitHub or Bitbucket pull requests as well. CodeFactor allows you to toggle inspection for any repository branch on the fly. CodeFactor integrates with Slack to send code quality notifications for every commit in a branch or pull request. To install, go to the repository settings page. Straightforward pricing based on private repository number. Plain and simple with no hidden fees. Seamless integration into your workflow.Starting Price: $19 per month -
17
Sider Scan
Sider Scan
Sider Scan is a lightning-fast duplicate code detection tool for software developers that finds and continuously monitors problems with code duplication. GitLab CI/CD, GitHubActions, Jenkins & CircleCI® integration. Installation using a Docker image. Easy team sharing of the analysis details. Continuous and fast analysis that runs in the background. Dedicated product support via email and phone. Sider Scan enhances long-term code quality and maintenance processes with in-depth duplicate code analysis. It's designed to complement other analysis tools, helping teams to produce cleaner code, and supporting continuous delivery. Sider finds duplicate blocks of code in your project and groups them. For each pair of duplicates, a diff library is created and pattern analyses are initiated to determine if there are any problems. This is referred to as the 'pattern' method of analysis. Time-series analysis is only possible when the scan is consistently run at regular intervals. -
18
Testwell CTC++
Testwell
Testwell CTC++ is a powerful instrumentation-based code coverage and dynamic analysis tool for C and C++ code. With certain add-on components CTC++ can be used also on C#, Java and Objective-C code. Further, again with certain add-on components, CTC++ can be used to analyse code basically at any embedded target machines, also in very small ones (limited memory, no operating system). CTC++ provides Line Coverage, Statement Coverage, Function Coverage, Decision Coverage, Multicondition Coverage, Modified Condition/Decision Coverage (MC/DC), Condition Coverage. As a dynamic analysis tool, CTC++ shows the execution counters (how many times executed) in the code, i.e. more than a plain executed/not executed information. You can also use CTC++ to measure function execution costs (normally time) and to enable function entry/exit tracing at test time. CTC++ is easy to use.Starting Price: Free -
19
Codegrip
Codegrip
Customize the code review rule sets to align with the standards you want to follow. Automatically avoid bugs that are not important to you so that you can concentrate on what matters. Perform code reviews without worrying about the security of your code. Codegrip does not store any of your code while performing automated code reviews. Always stay updated about the progress of your project. Get code quality reports and pull request notifications automatically in a Slack channel of your choice. Manage multiple projects with a dashboard view that provides all information in one place. Track the improvement in code quality over time with the help of easy-to-understand parameters and graphs. OWASP represents a broad consensus about the most critical security risks to web and mobile applications. It also guides developers and security professionals on the most critical vulnerabilities that are commonly found in web applications, which are also easy to exploit.Starting Price: $12 per user per month -
20
Coverity Static Analysis
Black Duck
Coverity Static Analysis is a comprehensive code scanning solution that enables developers and security teams to deliver high-quality software in compliance with security, functional safety, and industry standards. It effectively uncovers complex defects across extensive codebases, identifying and resolving code quality and security issues that span multiple files and libraries. Coverity supports compliance with a wide range of standards, including OWASP Top 10, CWE Top 25, MISRA, and CERT C/C++/Java, providing built-in reports to track and prioritize issues. With the Code Sight™ IDE plugin, developers receive real-time results, including CWE information and remediation guidance, directly within their development environment, facilitating the integration of security into the software development life cycle without compromising developer velocity. -
21
codebeat
codequest
Set up codebeat to track every quality change in one of your Github, Bitbucket, GitLab or self-hosted repositories. We'll get you up and running in seconds. codebeat provides automated code review and supports many programming languages. It will help you prioritize issues and identify quick wins in your web and mobile applications. codebeat offers a great team-management tool for companies and open source contributors. Assign access levels and move people between projects within seconds. Perfect for both small and large troupe.Starting Price: $20 per user per month -
22
PMD
PMD
PMD is a source code analyzer. It finds common programming flaws like unused variables, empty catch blocks, unnecessary object creation, and so forth. -
23
ESLint
ESLint
ESLint is a static code analysis tool for identifying problematic patterns in JavaScript code. It allows developers to configure rules and define custom ones, addressing both code quality and coding style issues. ESLint supports current ECMAScript standards and experimental syntax from future drafts. It can process code using JSX or TypeScript through appropriate plugins or transpilers. The tool is integrated into most text editors and can be part of continuous integration pipelines, enabling automatic problem detection and correction. ESLint is the #1 JavaScript linter by downloads on npm and is used at companies like Microsoft, Airbnb, Netflix, and Facebook. Preprocess code, use custom parsers and write your own rules that work alongside ESLint's built-in rules. Customize ESLint to work exactly the way you need it for your project. Many problems ESLint finds can be automatically fixed. ESLint fixes are syntax-aware so you won't experience errors. -
24
Biome
Biome
Biome is a comprehensive toolchain for web projects, offering high-performance formatting and linting capabilities for languages such as JavaScript, TypeScript, JSX, TSX, JSON, CSS, and GraphQL. Its formatter achieves 97% compatibility with Prettier, enabling rapid code formatting that can handle malformed code in real time within various editors. The linter incorporates over 270 rules from ESLint, TypeScript ESLint, and other sources, providing detailed, contextual diagnostics to assist developers in enhancing code quality and adhering to best practices. Built with Rust, Biome ensures exceptional speed and efficiency, capable of formatting extensive codebases significantly faster than comparable tools. It is designed for seamless integration into development environments, offering a unified solution for code formatting and linting without the need for extensive configuration. Designed to handle codebases of any size. Focus on growing products instead of your tools. -
25
Checkstyle
Checkstyle
Checkstyle is a tool for checking Java source code for adherence to a code standard or set of validation rules (best practices).
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