Coordinate Converter
Convert live between Decimal Degrees, DMS, UTM, MGRS and Geohash, with an interactive map. Click or drag the marker to set a location.
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The tool catalog
Every tool, one page each
55 standalone browser tools — GIS utilities, data, design, math, classroom, soccer, and everyday helpers. Each is a single page at its own path.
55 browser tools
Free — no accounts
No installs, no tracking
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A short list of favorites, updated now and then.
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All tools
55 items
Maps & GIS
18GeoJSON Viewer & Editor
Paste, drop or load GeoJSON, see it on a map, click features to edit their properties, validate, and re-export.
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Bounding Box Picker
Draw or type a geographic bounding box and copy it in the five formats APIs want — CSV, WKT, GeoJSON, Leaflet and Overpass.
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Static Map Generator
Compose a map view with pins, then export a ready-to-use PNG image or an OpenStreetMap embed snippet. No API keys.
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Batch Geocoder
Paste a list of addresses or place names and get coordinates for all of them — on a map and as CSV or GeoJSON.
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Spatial Data Scraper
Extract locations from a URL or pasted page text — addresses, cities, landmarks — geocode them, preview on a map, and export JSON, CSV or GeoJSON.
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Sun Calculator
Sunrise, sunset, twilight and golden hour for any place and date, with a sun-path chart. NOAA-accurate math, no libraries.
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Weather
Current conditions, a 24-hour strip with sparkline, a 7-day forecast and a live precipitation radar for any place — offline caching, °C/°F toggle.
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Moon Calculator
Moonrise, moonset, phase and illumination for any place and date, with a live moon disc and a month of phases at a glance.
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Elevation Profiler
Draw a route on the map and see the terrain profile under it — distance, climb, descent and steepest grade.
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Radius & Buffer Tool
Drop a pin and draw accurate distance rings around it — true geodesic circles, not flat-map approximations — then export GeoJSON.
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Flight Route Plotter
Build a multi-leg route between airports and cities, see true great-circle paths with distances and flight times.
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Photo Location Viewer
See where your photos were taken from their hidden EXIF GPS data, map them, and save clean copies with the metadata stripped.
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Map Projection Explorer
See the world in 19 map projections, visualize distortion with Tissot's indicatrix, and compare Mercator vs Gall-Peters side by side.
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GeoJSON Diff Viewer
Compare two GeoJSON files — added, removed and changed features matched by ID or geometry, shown on a map and in a detail list.
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Choropleth Map Builder
Paste CSV data keyed by US state or country, fuzzy-match it to real geography, and get a colored choropleth map with a legend — export SVG or PNG.
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Coordinate Grid Generator
Draw lat/long graticules, UTM and MGRS grids over a real map — styled, labeled, and exportable as GeoJSON or a standalone SVG.
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Map Style Builder
Design a map color theme on a live sample city — water, roads, parks, labels — and export a real MapLibre style JSON or theme tokens.
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Data
5Quick Chart Maker
Type or paste data and export a chart — bar, line, pie, doughnut or scatter. Edit as a table or raw CSV/TSV, then download a PNG.
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CSV Explorer
Open a CSV without a spreadsheet: sort, filter, per-column stats and histograms — then clean it up and re-export.
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CSV ↔ JSON Converter
Convert between CSV and JSON in either direction with live preview, delimiter auto-detect, type detection and nested-JSON flattening.
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Data Generator
Set up your columns and generate realistic fake data — names, emails, dates, prices and more — then export as CSV or JSON. Same seed = same data every time.
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Data Anonymizer
Mask or fake-replace sensitive CSV columns — shuffle, hash, redact, add noise — with reproducible seeding and a k-anonymity check.
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Design
5Color Palette Generator
Generate palettes with harmony rules, lock and edit swatches, extract colors from an image, check WCAG contrast and color-blind safety.
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CSS Playground
Visually build gradients, layered shadows and border-radius blobs, then copy production-ready CSS.
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Image Converter & Resizer
Convert, resize and compress images right in your browser — nothing is uploaded, and private EXIF data is stripped along the way.
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Favicon Generator
Make a complete favicon set from an emoji, letters or an image — real multi-size .ico, all the PNGs, manifest and HTML tags.
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SVG Pattern Generator
Design a seamless tileable pattern — dots, stripes, hexagons, waves and more — preview it tiled, then export SVG, CSS or PNG.
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Math
13Function Grapher
Plot lines and parabolas and see the slope, intercepts and vertex computed live as you adjust them.
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Slope Explorer
Drag two points on a grid and watch the slope and line equation — slope-intercept and point-slope — update live.
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Quadratic Explorer
See a parabola in standard, vertex and factored form at once, with a live graph and roots/vertex readouts.
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Systems Explorer
Two lines on a graph — see their intersection and the solved system live, including parallel and identical cases.
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Exponential Explorer
y = a·bˣ with live sliders — see growth vs. decay, a table of values, and an optional linear comparison.
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Inequality Grapher
Shade a linear inequality or a system of them and see the solution region update as you edit the inequalities.
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Stats Explorer
Enter a dataset and get mean, median, mode, quartiles, a histogram and a box plot, all computed live.
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Scatter Plot & Best Fit
Plot (x, y) data, fit a least-squares trend line, and read off the correlation coefficient live.
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Transformations
Translate, reflect, rotate and dilate a shape on the coordinate grid and see the transformed vertices live.
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Right Triangle Explorer
Drag the legs of a right triangle and watch a² + b² = c² prove itself with squares drawn on each side.
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Formula Sheet
A searchable high-school math reference — area, volume, coordinate geometry, algebra and finance formulas with worked examples.
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Number Converter
Convert between fractions, decimals and percents in either direction, with automatic simplification.
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Geometry Toolbox
Pick a 2D or 3D shape, enter its dimensions, and get area, perimeter, volume and surface area instantly.
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Classroom
4Seating Chart Generator
Paste a roster, pick rows, pods or a U-shape, add constraints — keep these two apart, lock her to the front row — and shuffle until the chart works.
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Probability Lab
Run coins, dice, spinners, cards, urns and the birthday paradox — and watch empirical results converge to the exact theory in live charts.
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Class Timer
A big, projector-friendly countdown and stopwatch for timing class activities and transitions.
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Group Maker
Paste a roster and shuffle it into random, balanced groups — by group count or by group size.
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Soccer
6Soccer Tactics Board
Set up formations on a scale pitch, drag players, draw movement and passing runs, animate a move across frames, then export or share.
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Tournament Bracket Builder
Build single- or double-elimination brackets or a round-robin league, enter results, and watch standings and the champion emerge. Works for any contest.
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Match Timeline Creator
Log goals, cards, subs and VAR drama minute by minute and get a clean match-timeline infographic — export PNG, SVG or a text report.
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Training Session Planner
Drag cones, goals, players and coaching arrows onto a pitch to build multi-drill practice sessions — print clean coaching sheets.
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League Table What-If Calculator
Click W/D/L on remaining fixtures and watch the standings reshuffle live — with every possible finish enumerated for any team.
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Match Lineup Card Generator
Type in your Starting XI and get a shareable lineup graphic in Pitch, List or Broadcast style — sized for social, exported as PNG.
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Utilities
4QR Code Generator
Make QR codes for links, Wi-Fi, email, phone or text with custom colors and sizes; download as PNG or SVG.
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Markdown Previewer
Write Markdown with a live side-by-side preview and export clean HTML — drafts autosave as you type.
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Unit Converter
Convert length, area, temperature, running pace and more across 12 categories — including the GIS units nobody remembers.
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Vacation Selector
A short, adaptive survey — each page tailored to your last answers — matches you to travel destinations from a curated set of ~85 places worldwide, with shareable results.
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