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Browse the tool catalog - Geography & Science

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Focused on Geography & Science.

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Math, Date & Finance613

Calculators, numerics, date logic, statistics, and finance tools

Images, Audio & Video582

Image, audio, and video processing, conversion, and optimization tools

Design & Color291

Color, layout, graphics, visual styling, and design helper tools

Text & Writing204

Writing, cleanup, formatting, extraction, and text analysis tools

Developer & Web172

Developer utilities, networking, web debugging, and automation helpers

Conversion & Encoding169

Format, file, archive, unit, and encoding conversion tools

Audio Encoding and Format Conversion Tools

Image Format Conversion and Animated Export Tools

JSON Interchange and Format Translation Tools

Color Space Conversion Tools for Web and Print

Text Case, Encoding, and Normalization Conversion Tools

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Astronomy

Golden Hour Calculator

Calculate golden hour times - the best time for photography with soft, warm light

Geography

Great Circle Distance Calculator

Calculate the shortest distance between two points on Earth using the great circle formula

Geography

Rhumb Line Distance Calculator

Calculate the distance between two points following a rhumb line (constant bearing course)

Geography

Tide and Lunar Distance Predictor

Estimate spring/neap tide forcing and lunar-distance amplification with a transparent offline planning model.

Geography

Tide Calculator

Estimate local tide height and upcoming high/low tides from a known reference high tide.

Geography

Timezone Lookup by Coordinates

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.

Astronomy

Telescope Field of View Calculator

Compute telescope optics for visual astronomy: magnification, true field of view, focal ratio, exit pupil, limiting magnitude, Dawes/Rayleigh resolution and useful-magnification range. Enter aperture, telescope focal length, an eyepiece focal length and its AFOV (metric mm or imperial inches), pick a target (deep-sky, planetary, lunar or terrestrial), and get a scaled field-of-view overlay plus target-specific advice on exit pupil and framing.

Astronomy

Sun Position & Shadow Length Simulator

Compute the sun’s elevation and azimuth (NOAA algorithm) for any latitude, longitude, date and time, plus the length and direction of the shadow cast by an object of a given height, with sunrise/sunset and a full-day shadow curve

Astronomy

Solar Eclipse Calculator

Calculate solar eclipse dates and types for any year

Astronomy

Solstice & Equinox Calculator

Calculate solstices, equinoxes, and seasons for any year

Astronomy

Sunrise & Sunset Calculator

Calculate sunrise and sunset times for any location

Geography

Open Location Code Plus Codes Encoder / Decoder

Convert coordinates and Google Plus Codes in both directions, including short-code recovery and refinement precision.