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Convert light-years to parsecs, AU, kilometers, meters, and miles. Enter any astronomical distance and get instant conversions with formulas. Free, browser-based.

Beautify and explore JSON with adjustable indentation, key sorting, a collapsible tree view, and structure stats.

Calculate pump hydraulic power, shaft power, and motor sizing from flow rate and head. Modes: hydraulic power (ρgQH), brake power with pump efficiency, motor input with motor efficiency, and power from pressure rise. Results in kW, hp, and W. Water and custom specific gravity. Metric and imperial units. Free, browser-based.

Free FPS to frame-time converter — convert frames per second to milliseconds per frame (and back). Handy for competitive gaming benchmarks.

Calculate permutations nPr and factorials n! for ordered arrangements with formulas and step-by-step work.

Free JSON to Zod schema generator — paste sample JSON and get a starter Zod object schema in TypeScript. Copy and refine.

Free gaming sensitivity converter — match your aim across CS2, Valorant, Apex, Overwatch, and more using yaw and cm/360.

Free microphone tester: check mic input, live volume levels, and record a quick playback test in your browser. No signup.

Calculate GC content and base composition for DNA or RNA — percentages, counts, AT/GC ratio, and FASTA support. Free, instant, browser-based.

Calculate star distance from parallax or magnitude. Convert between parsecs, light-years, AU, and km. Free, instant, browser-based astronomy tool.

Molality calculator free — find mol/kg from moles and solvent mass. Convert grams to molality using formula lookup. Chemistry in your browser.

Convert images between PNG, JPG, WebP, AVIF, and BMP right in your browser, with quality control and transparency handling.