Developer Tools
Extract JS Comment Blocks
Extract JavaScript line and block comments from pasted JavaScript, TypeScript, JSX, or TSX source without executing, compiling, resolving, fetching, bundling, or uploading code.
0 / 30,000 characters. No upload, storage, or account required.
JS Comment Blocks workflows
Use this extractor when copied source needs a browser-local inventory before API reviews, release QA, migrations, documentation, cleanup, or handoffs.
Audit source structure
Pair it with Extract JS Module Specifiers, Extract JS Fetch URLs, and Extract JS Route Paths.
Review behavior and coverage
Use Extract JS Error Messages, Extract JS Function Names, and Extract JS Test Case Names.
Clean copied output
Send extracted rows to Sort Lines, Remove Duplicate Lines, or Normalize Whitespace.
What this tool does
Extract JS Comment Blocks scans pasted source as text, lists each JavaScript comment with source lines, removes duplicates, and runs locally in your browser.
Common use cases
Extract JavaScript line comments and block comments from pasted JavaScript, TypeScript, JSX, TSX, config files, tests, generated code, or copied source before release-note drafting, migration planning, code cleanup, documentation, or QA handoffs.
Use Extract JS Comment Blocks 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, JSX, TSX, framework files, tests, client modules, generated code, or copied source that may contain comment blocks.
- Choose whether duplicate rows should be removed and whether extracted values should be normalized for comparison.
- Review extracted values with line numbers, then copy the clean list for audits, migration notes, QA checklists, documentation, or handoffs.
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 Comment Blocks runs locally in your browser. Your pasted code is not uploaded, compiled, resolved, fetched, executed, stored, bundled, or logged.
FAQ
Does Extract JS Comment Blocks execute JavaScript?
No. It scans pasted source as text and does not execute code, compile TypeScript, fetch dependencies, upload, store, or log snippets.
Which comments are included?
It finds common // line comments and /* block comments */ in pasted JavaScript, TypeScript, JSX, TSX, config, and test snippets.
When is this useful?
Use it while collecting release-note clues, migration notes, code cleanup items, QA context, documentation snippets, or copied-source handoffs.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.