Developer Tools
Extract JS Numeric Literals
Extract numeric literals from pasted JavaScript, TypeScript, JSX, or TSX source without executing, compiling, calculating, evaluating, or uploading code.
0 / 30,000 characters. No upload, storage, or account required.
JS Numeric Literals workflows
Use this extractor when copied source needs a browser-local inventory of constants, thresholds, timeouts, bitmasks, sizes, limits, or generated numeric values.
Audit constants and behavior
Pair it with Extract JS Variable Names, Extract JS Function Names, and Extract JS Test Case Names.
Review literal families
Use Extract JS String Literals, Extract JS Regex Literals, and Extract JS Comment Blocks.
Clean copied output
Send extracted rows to Sort Lines, Remove Duplicate Lines, or Normalize Whitespace.
What this tool does
Extract JS Numeric Literals scans pasted source as text, lists decimal, hex, binary, octal, exponent, and bigint literals with source lines, removes duplicates, and runs locally in your browser.
Common use cases
Extract numeric literals from pasted JavaScript, TypeScript, JSX, TSX, constants files, config modules, tests, generated code, or copied source before constant audits, threshold reviews, migration planning, QA checklists, documentation, or handoffs.
Use Extract JS Numeric Literals 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, config files, tests, constants, copied snippets, or generated source that may contain numeric literals.
- Choose whether duplicate rows should be removed and whether extracted values should be normalized for comparison.
- Review extracted numbers with line numbers, then copy the clean list for constant 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 Numeric Literals runs locally in your browser. Your pasted code is not uploaded, compiled, calculated, evaluated, executed, stored, or logged.
FAQ
Does Extract JS Numeric Literals execute JavaScript?
No. It scans pasted source as text and does not execute code, compile TypeScript, calculate values, evaluate expressions, upload, store, or log snippets.
Which number formats are included?
It finds common decimal, underscore-separated, exponent, hexadecimal, binary, octal, and bigint numeric literals in pasted JavaScript or TypeScript snippets.
When is this useful?
Use it while reviewing constants, thresholds, timeouts, bitmasks, size limits, generated values, QA checklists, migration notes, 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.