Math & Numbers
Compute transformer or feeder voltage regulation from equivalent-circuit parameters: ΔU% ≈ (I·R·cosφ ± I·X·sinφ)/U·100. Returns both the approximate (linear) and exact (phasor) values; supports lagging, unity and leading power factor.
voltage-regulation-calculatorMath & Numbers
Calculate the force-amplification ratio and self-locking condition of a wedge mechanism. Ideal M = 1/tan(α), with friction M = 1/tan(α+ρ) where ρ = arctan(μ). Self-locking when α ≤ ρ (i.e. tan(α) ≤ μ).
wedge-angle-force-calculatorMedia
Remove or blur watermarks and logos from videos by specifying the watermark area
video-watermark-removeText Processing
Audit text against a four-axis voice print (Formal/Casual, Confident/Cautious, Optimistic/Concerned, Playful/Serious) with a curated lexicon. Optional brand-reference comparison gives a 0–100 deviation.
voice-tone-tone-of-voice-auditorMedia
Combine video with external audio using copy mode.
video-smart-muxMedia
Add selectable SRT subtitles without burning them in.
video-srt-softmuxMath & Numbers
Solve wavelength, frequency, or wave speed from v=f·λ, with derived period, angular frequency, wave number, and photon energy
wavelength-calculatorDesign
Preview a heading + body Google Fonts pairing with weight and line-height controls, and copy a ready-to-paste CSS @import + variables snippet. Curated 22-face registry plus 7 proven pairing presets.
webfont-pairing-labMath & Numbers
Calculate divider output voltage, solve for R1 or R2, and evaluate load effects with a circuit diagram
voltage-divider-calculatorMath & Numbers
Compute cable voltage drop from current, length, conductor size (AWG/mm²) and material, for DC, single-phase and three-phase circuits
voltage-drop-calculatorDevelopment
Connect to any WebSocket (ws:// or wss://) endpoint from your browser, send and receive messages, and inspect open/close/error events with codes — ideal for debugging real-time APIs and sockets
websocket-testerMath & Numbers
Convert watts to horsepower with configurable decimal precision
watt-to-hp