Developer Tools
Extract JS Function Names
Extract JavaScript and TypeScript function names from pasted source without executing, compiling, rendering, uploading, or storing code.
0 / 30,000 characters. No upload, storage, or account required.
JavaScript function extraction workflows
Use this extractor when pasted source needs a fast symbol inventory before refactoring, test planning, migration notes, or documentation cleanup.
Map source structure
Pair function extraction with Extract JS Class Names, Extract JS Variable Names, and Extract JS Interface Names.
Review module boundaries
Use Extract JS Import Statements and Extract JS Export Statements before moving code between files.
Clean copied lists
Send extracted names to Remove Duplicate Lines, Sort Lines, or Case Converter.
Quick answer
Extract JS Function Names is a browser-based extract JS function names for checking copied developer data such as payloads, URLs, encoded values, identifiers, snippets, or logs without sending the input to a server.
- Primary task
- extract JS function names
- Processing
- Runs on copied snippets in your browser; no account or saved input.
- Workflow
- Developer Data Toolkit
What this tool does
Extract JS Function Names scans pasted source as text and returns named function declarations plus common arrow-function variable names for code review, refactoring, documentation, migration planning, and cleanup handoffs.
Common use cases
Extract JavaScript function declarations and arrow-function variable names from pasted source snippets, utility modules, React components, Node files, or copied code before code review, documentation, migration, cleanup, or refactoring handoffs.
Use Extract JS Function Names when you are working with copied API payloads, logs, encoded values, config snippets, identifiers, or debugging data and need a quick browser-local check before pasting the result into docs, tickets, tests, or another developer tool.
How to use it
- Paste JavaScript, TypeScript, React component, test, utility-module, or Node source.
- Choose whether duplicate function names should be removed and whether output should be normalized for comparison.
- Review extracted names with source lines, then copy the list into a refactor checklist, documentation note, test audit, or migration ticket.
Example workflow
Copy a small payload or encoded value from an API response, request URL, log line, or config file. Run the focused check here, confirm the output is readable, then continue with related developer data tools such as validation, formatting, decoding, timestamp conversion, or CSV/JSON conversion.
Privacy note
Extract JS Function Names runs locally in your browser. It does not execute JavaScript, compile TypeScript, render components, fetch dependencies, upload, store, or log pasted source. Redact secrets, tokens, and private repository details before sharing extracted output.
FAQ
These answers focus on copied-snippet workflows, safe sample data, validation boundaries, and what to check before moving output into code, APIs, docs, or tickets.
3 focused answers for this page
Does Extract JS Function Names execute JavaScript?
No. It scans pasted JavaScript as text and does not execute code, evaluate modules, fetch assets, upload, store, or log snippets.
Which function names are included?
It finds named function declarations and common const, let, or var arrow-function assignments in pasted JavaScript or TypeScript.
When is this useful?
Use it while inventorying utility functions, reviewing copied modules, preparing refactors, documenting source snippets, or checking code cleanup tasks.