Extractor JS

A developer-focused tool that extracts JavaScript from HTML, enabling quick review of inline and external scripts for audits, debugging, and security assessments.

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About This Tool

This tool automates the discovery of JavaScript sources within HTML or HTML-like input by parsing the content and enumerating each script block and external reference with metadata.
It distinguishes between inline and external scripts, capturing properties such as source URL, code length, and position within the document, and supports deduplication and optional external fetch for deeper analysis.
Designed for developers, security teams, and QA professionals, it enables rapid inventory, comparison across pages, and automation-ready outputs for audits, debugging, and compliance reviews.
Core features include per-script metadata, deterministic JSON output, and optional export to JSON or CSV for integration with pipelines, scanners, and dashboards. Use cases include security reviews of embedded scripts, performance investigations of third-party code, and documentation of a site's JavaScript footprint.

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How to Use

Provide input HTML or source containing scripts.
Configure extraction options to include inline and/or external scripts and toggles for external fetch.
Run extraction to produce a structured script catalog with metadata.
Review results, filter by criteria (inline vs external, size, or source).
Export results as JSON/CSV for automation and reporting.

Frequently Asked Questions

Find Quick Answers

What inputs does the tool accept?

The tool accepts raw HTML or text containing script tags and external script references. It does not require file uploads and returns a structured catalog of scripts with metadata for downstream processing.

How are external scripts handled?

External scripts are listed by their src URL. By default, the tool does not fetch external content; you can enable fetch to retrieve and include the external script contents for deeper analysis, subject to network and CORS constraints.

Does the tool execute the JavaScript it extracts?

No. The extraction is static and non-executable. It identifies sources and code blocks but does not execute or evaluate any script, nor resolve code loaded dynamically at runtime beyond static references.

What is the primary output format?

The primary output is a structured JSON catalog of scripts with fields such as id, kind, src, code, length, and location. The tool also supports exporting to JSON or CSV for automation pipelines.

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