Filter Numbers

This specialized text processing utility extracts or removes numerical values from mixed content, isolating digits while preserving or discarding surrounding text based on user-defined filtering criteria. The tool handles various number formats including integers, decimals, percentages, currency amounts, phone numbers, and scientific notation, applying pattern matching algorithms that distinguish numerical data from alphanumeric strings.

Users configure filtering modes selecting extraction (outputting only numbers) versus removal (outputting text with numbers stripped), define number recognition rules accounting for comma separators, decimal points, negative signs, or percentage symbols, and specify output formatting preferences like comma-separated lists, line-separated values, or structured JSON arrays. Advanced options include regex-based custom pattern definitions for specialized number formats, digit grouping preservation maintaining original formatting conventions, and range filtering capturing only numbers meeting minimum/maximum thresholds. The processor handles large documents efficiently through streaming algorithms avoiding memory limitations inherent in browser-based text manipulation.

Common applications include cleaning survey responses extracting numerical ratings from open-ended feedback, processing financial documents isolating monetary amounts from descriptive text, analyzing log files extracting timestamps or error codes while discarding diagnostic messages, or preparing data for spreadsheet import by removing non-numeric formatting. Educational uses demonstrate regex pattern construction, number recognition algorithms, and text parsing principles. The tool integrates clipboard operations for rapid content import/export, supports batch file processing, validates extracted numbers flagging malformed values, and provides preview highlighting showing which portions of source text will be filtered, enabling verification before final processing.