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 thresholds and limits
Pair numeric constants 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.
Quick answer
Extract JS Numeric Literals is a browser-based extract JS numeric literals 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 numeric literals
- Processing
- Runs on copied snippets in your browser; no account or saved input.
- Workflow
- Developer Data Toolkit
What this tool does
Extract JS Numeric Literals scans pasted source as text, lists decimal, hex, binary, octal, exponent, and bigint values with source lines so timeout limits, thresholds, IDs, masks, and feature flags can be reviewed 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 timeout values, limits, bitmasks, feature flags, prices, ratios, or IDs.
- 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 config audits, migration notes, QA boundary checks, release reviews, 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.
Practical notes for this tool
Best use case
Use Extract JS Numeric Literals when source needs a quick inventory of thresholds, timeouts, retry limits, feature-flag masks, prices, ratios, or IDs before changing behavior or preparing QA boundary checks.
Audit checkout limits before release
const maxItems = 250; const timeoutMs = 7_500; const retryBackoff = 1.25e3; const mask = 0xff;
250 7_500 1.25e3 0xff
Privacy and local processing
Numeric-literal extraction runs locally in your browser. ClearUtils does not upload, compile, calculate, execute, resolve, store, or log pasted source.
Limitations to know
- It does not infer units such as milliseconds, cents, or percentages.
- Numbers in comments or strings may require separate review.
- Safety-critical or billing-related constants should be checked in the real codebase and tests.
Practical FAQ
Does this calculate what the numbers mean?
No. It inventories numeric literals only. Review the surrounding code, units, defaults, and tests before changing limits or production behavior.
Related workflow links
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 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.