Math & Numbers
Convert watts to kilowatts with configurable decimal precision
watt-to-kwMath & Numbers
Convert weeks to days with configurable decimal precision
weeks-to-daysMedia
Convert WebM video files to MP4 format
webm-to-mp4Math & Numbers
Calculate weighted GPA from credits, grades, and course rigor bonuses for honors, AP, or IB classes
weighted-gpa-calculatorMath & Numbers
Run Welch two-sample t tests for independent groups with unequal variances from raw data or summary statistics
welch-t-test-calculatorDesign
Analyze a WebP/VP8 image with Sharp, generate a grayscale displacement map, and render it as an interactive Three.js 3D relief surface
vp8-image-analyzerMath & Numbers
Calculate a weighted average from paired values and weights, with contribution and normalized weight details
weighted-average-calculatorNetwork
Generate a unique webhook capture URL, inspect incoming requests, validate signatures, and replay payloads to a target endpoint
webhook-debugger-relayText Processing
Replace consecutive spaces/tabs with single space and trim line start/end whitespace
whitespace-normalizerFitness
Calculate calories burned while walking
walking-burn-calculatorMedia
Compress a WAV file by converting to MP3, AAC, OGG, or Opus
wav-compressMedia
Convert WAV audio to AAC with bitrate, resampling, and channel options
wav-to-aac