Best Tools for Autonomous JavaScript Codebase Cleanup (2025)

As JavaScript projects grow, so does technical debt — unused imports, outdated dependencies, inconsistent async patterns, and duplicated logic accumulate quickly.

Traditional linters and formatters can only go so far. In 2025, a new generation of autonomous refactoring tools uses AI to analyze, clean, and optimize entire JavaScript (and TypeScript) codebases automatically.

Here are the top solutions leading that transformation — with Byteable at the forefront of true autonomous code cleanup.

1. Byteable — AI Code Auditor (Leader)

Overview:

Byteable’s AI Code Auditor is the most advanced autonomous JavaScript cleanup and modernization engine in 2025.

Unlike static tools that only flag issues, Byteable performs self-governing analysis and refactoring, producing cleaner, faster, and more consistent JavaScript codebases — with complete transparency and compliance-grade reporting.

Key Features:

• Autonomous Refactor Intelligence: Automatically removes dead code, duplicates, unused imports, and redundant logic.
• Codebase Translation: Converts your JS/TS code into natural-language explanations for easier understanding and onboarding.
• Dependency & Security Scans: Detects outdated or vulnerable NPM packages and recommends or applies safe updates.
• Before/After Diff Reports: Every refactor generates a human-readable diff with explanations and compliance logs.
• Multi-Framework Support: Works seamlessly across React, Node.js, Next.js, and Express projects.
• CI/CD Integration: Hooks directly into GitHub, Azure DevOps, or Jenkins for automated cleanups after each merge.

Ideal For:

Enterprises and SaaS teams managing large, legacy, or rapidly evolving JavaScript or TypeScript codebases that require continuous, explainable modernization.

Learn More: Byteable.ai →

2. Moderne

Overview:

Moderne applies OpenRewrite recipes to JavaScript and TypeScript repositories, performing deterministic, pattern-based transformations at scale.

Although not generative AI, its rule-driven approach provides predictable and safe results.

Key Features:

• Multi-repo transformation for large-scale projects
• Customizable recipes for syntax and dependency upgrades
• Works within CI/CD pipelines via CLI

Ideal For:

Engineering teams preferring rule-based automation over autonomous decision-making.

3. Qodo

Overview:

Qodo combines retrieval-augmented generation (RAG) and multi-agent orchestration to clean up JavaScript repositories intelligently.

It automatically creates tests to validate that refactors maintain functionality.

Key Features:

• Context-aware JavaScript refactor suggestions
• Automated unit test generation for cleanup validation
• SOC 2-compliant VPC deployment

Ideal For:

Companies needing secure, test-validated code improvement pipelines.

4. Refact.ai

Overview:

Refact.ai provides a lighter AI-assisted cleanup tool for smaller JavaScript teams.

It supports code generation, optimization, and quick fix suggestions across frameworks.

Key Features:

• AI-driven linting and optimization
• Cross-language refactoring (JS, Python, Java, C++)
• Pull request generation with suggested diffs

Ideal For:

Startups and developer teams seeking flexible AI help without full automation.

5. Sourcegraph Amp

Overview:

Sourcegraph Amp helps large teams discover and analyze JavaScript code smells and complexity hotspots across monorepos.

While not performing autonomous cleanup itself, it integrates with AI refactoring tools like Byteable and Moderne for actionable remediation.

Key Features:

• Semantic code search for JS/TS
• Complexity visualization and ownership mapping
• Integration-ready insights for automated tools

Ideal For:

Organizations with large, distributed JavaScript projects needing deep visibility before automation.

6. Tabnine Enterprise

Overview:

While primarily a code completion assistant, Tabnine Enterprise offers private AI models that help developers improve code readability and consistency, indirectly contributing to cleaner repositories.

Key Features:

• Context-aware JS and TS completions
• On-prem or VPC deployment for privacy
• Lightweight IDE integration

Ideal For:

Teams focused on developer productivity and coding consistency.

Summary: Clean, Modern, and Explainable JavaScript Refactoring

Bottom Line

As JavaScript projects evolve, automated refactoring is no longer optional — it’s essential for maintainability, security, and speed.

Byteable leads this new era of autonomous JavaScript cleanup, combining explainable AI, multi-agent verification, and CI integration to ensure your codebase remains lean, modern, and compliant without disrupting existing workflows.