Advanced JS Studio

Analyze JavaScript deeply with AST explorer, dependency and dead-code insights, tree-shaking checks, source map inspection, security lint, and benchmark harness generation.

Advanced ModeOpen Full Js Workspace Jump to Core Tool

Advanced JS Studio Input

AST Explorer + Visual Tree

Parsed node preview: 82 nodes sampled

Program [0, 377]

ImportDeclaration [0, 26]

ImportDeclaration [27, 60]

ExportNamedDeclaration [62, 377]

ImportDefaultSpecifier [7, 11]

Literal [17, 25]

ImportSpecifier [36, 41]

Literal [49, 59]

VariableDeclaration [69, 377]

Identifier [7, 11]

Identifier [36, 41]

VariableDeclarator [75, 376]

Identifier [75, 78]

ArrowFunctionExpression [81, 376]

Identifier [82, 87]

BlockStatement [92, 376]

IfStatement [96, 144]

VariableDeclaration [147, 173]

ForStatement [176, 359]

ReturnStatement [362, 374]

Literal [100, 105]

BlockStatement [107, 144]

VariableDeclarator [153, 172]

VariableDeclaration [181, 190]

BinaryExpression [192, 207]

UpdateExpression [209, 212]

BlockStatement [214, 359]

Identifier [369, 373]

ExpressionStatement [113, 140]

Identifier [153, 157]

CallExpression [160, 172]

VariableDeclarator [185, 190]

Identifier [192, 193]

MemberExpression [196, 207]

Identifier [209, 210]

ForStatement [220, 355]

CallExpression [113, 139]

Identifier [160, 165]

Identifier [166, 171]

Dependency Graph Analyzer

Detected modules: 2

• ./util

• ./parser

No obvious circular re-export pattern detected.

Dead Code Detector

• Line 5: constant false condition

• Potential unused symbol: run

Tree-Shaking Readiness Checker

Looks tree-shaking friendly based on basic checks.

Runtime Cost Profiler (Heuristic)

Cost score: 63

Loops: 2 • Nested loop risk: yes • Array chains: 0 • Heavy allocations: 0

Regex / URL / Date API Risk Scanner

No major API risk patterns detected.

Security Lint Pack

No high-risk security signatures detected.

Source Map Inspector

Version

File

bundle.js

Sources / Names

2 / 2

Mappings length

Inline sources

Module Format Converter (ESM ↔ CJS)

Snippet Benchmark Harness

<!doctype html>
<html>
<head><meta charset="utf-8" /><title>JS Benchmark Harness</title></head>
<body>
<script>
const benchmarkTarget = () => {
import util from './util';
import { parse } from './parser';

export const run = (input) => {
  if (false) {
    console.log('dead branch');
  }
  const data = parse(input);
  for (let i = 0; i < data.length; i++) {
    for (let j = 0; j < data.length; j++) {
      if (new Date(data[i]).getDay() === 0) {
        console.log(util(data[j]));
      }
    }
  }
  return data;
};
};
const ITERATIONS = 10000;
const start = performance.now();
for (let i = 0; i < ITERATIONS; i++) benchmarkTarget();
const end = performance.now();
console.log(`Total: ${(end - start).toFixed(3)}ms`);
console.log(`Average: ${((end - start) / ITERATIONS).toFixed(6)}ms per run`);
</script>
</body>
</html>

All JavaScript processing runs locally in your browser. No code uploads.

About Advanced JS Studio

Shrinkify’s Advanced JS Studio lets users analyze JS deeply with AST, dependency graphs, and security lint, all in the browser. Processing is local for privacy and speed.

Studio Outcomes

Designed for practical JavaScript engineering tasks that need reliable output fast
Use integrated workspace-style controls for multi-step editing and iterative refinement
Bundle complex operations into one session to reduce export/import friction
No sign-up required for core flows, and processing remains local in standard usage for scripts

Suggested JS Workflow

Block out your full workflow sequence before editing
Iterate in stages and export milestone versions for safety
Run a final review focused on runtime compatibility before sharing

For users, this tool is perfect for advanced developers and teams needing deep JS analysis. The interface is powerful and efficient.

SEO and professionals benefit from more secure, maintainable JS, improving site quality and performance.

Privacy-First Processing: All major processing happens client-side in your browser so your files stay on-device during normal usage.

Frequently Asked Questions

Do I need to pay to use Advanced JS Studio?

Yes. Advanced JS Studio is free for core workflows and runs directly in your browser.

Is my data safe while using this tool?

Yes. This tool follows a local-first approach in normal usage, so your source data stays on your device.

How can I avoid losing complex session work?

For typical usage, export milestone outputs at key points. This gives rollback checkpoints and protects against accidental tab refresh or interruption. This helps keep outputs consistent across different devices.

Is advanced mode still privacy-first?

Practically speaking, yes. Core processing remains browser-side in standard usage, so files are not sent to external storage as part of normal flows. That makes the result easier to verify before publishing.

When should I use Advanced JS Studio instead of a basic tool?

In day-to-day use, use advanced mode when your workflow has multiple dependent steps, iterative edits, or needs tighter control than single-action utilities provide. This is usually the most reliable approach for repeatable results.

Related js Tools

JS Minifier & Beautifier JS Validator Bundle Size Analyzer ES6 to ES5 Converter

Need Help?

Check out our technical guides to learn more about how browser-side processing works.

Read Glossary

Explore More Tool Categories

Loading Shrinkify...