Text Processing
Convert any Unicode text to plain ASCII: strip accents (é→e, ñ→n), romanize Cyrillic/Greek, and transliterate Chinese to pinyin (北京→Bei Jing). Drops emojis and symbols that have no ASCII equivalent.
unicode-to-ascii-transliteratorMedia
Extract still frames from a video at a fixed interval, custom timestamps, or the first N frames — uses fast input seeking and downloads a ZIP.
video-frame-extractorMedia
Mux two audio tracks into one video in copy mode.
video-dual-audio-mergerMedia
Combine video with external audio using copy mode.
video-smart-muxMedia
Add selectable SRT subtitles without burning them in.
video-srt-softmuxGames
Classic 3×3 tic-tac-toe against a random AI, an unbeatable minimax AI, or a friend. Keeps score across rounds.
tic-tac-toeMath & Numbers
Compute torque, force, or lever arm from τ = r·F·sin(θ), with the perpendicular force component shown
torque-calculatorGeography
Estimate local tide height and upcoming high/low tides from a known reference high tide.
tide-calculatorData Visualization
Render hierarchical data as a squarified treemap where area encodes each item's share
treemap-generatorMath & Numbers
Calculate Gibbs free energy ΔG = ΔH − TΔS, reaction spontaneity, equilibrium temperature, and equilibrium constant K.
thermodynamics-gibbs-calculatorGeography
Find the IANA timezone for any latitude / longitude: returns the timezone name (e.g. Asia/Shanghai), the current UTC offset, whether daylight saving time is active, the local wall-clock time, and the nearest reference cities. Fully offline — uses a built-in city/timezone reference database with nearest-reference matching.
timezone-lookup-by-coordinatesText Processing
Convert text to editorial-quality Title Case using AP, Chicago, or Wikipedia style rules. Lowercases function words, capitalizes first/last words and after colons, handles hyphenated compounds.
title-case-converter