Media
Professional audio noise reduction using FFmpeg advanced filters (highpass, afftdn, loudnorm) for optimal audio cleaning
ffmpeg-audio-noise-reductionText Processing
Extract even-numbered lines from text content with support for various indexing methods and custom criteria
even-line-extractorMath & Numbers
Generate Fibonacci sequence with customizable start numbers, length, and output format. Includes golden ratio analysis and mathematical properties.
fibonacci-generatorUtilities
Convert file encoding with auto-detection support between UTF-8, GBK, ISO-8859-1 and other character encodings
file-encoding-converterUtilities
Calculate MD5/SHA1/SHA256 hash values for files and verify against expected hashes
file-hash-verifierHealth
Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds to reduce eye strain
eye-care-20-20-20Math & Numbers
Convert between different energy units (joules, calories, kilowatt-hours, BTU, etc.)
energy-converterFinance
Check if a string is an Ethereum address. Does not validate address checksums.
eth-address-validatorValidation
Validate .env files for syntax errors and common issues
env-file-validatorFormat Conversion
Convert Excel file to CSV format, extracting data from the first worksheet
excel-to-csvFormat Conversion
Convert Excel file to HTML table format, extracting data from the first worksheet
excel-to-htmlFormat Conversion
Convert Excel file to JSON format, extracting data from the first worksheet
excel-to-json