Plot coordinates on an open map

Drop pins from a place search, typed lat/long (decimal or DMS), map clicks, or a bulk CSV — then measure straight-line distance, download CSV, or share a compressed link. Tiles are OpenStreetMap; no paid map key required.

Lat/Long Map Plotter is for checking coordinates, visualizing a small dataset, or comparing points without a paid map account. Add a point by searching, typing decimal or DMS coordinates, clicking the map, or importing a CSV; then inspect markers, measure between two, and export or share the configuration. Manual plotting and distance math stay in the browser. Search and reverse geocoding use OpenStreetMap services, which can be unavailable or rate-limited. Do not place private addresses in a share URL. Plot a single place or a batch of pins for trip plans, field notes, and event maps. Accepts decimal degrees, DMS, map clicks, and CSV lists. Coordinates stay local unless you export; verify projections when sharing with GIS tools that expect a specific datum. [batch-a-home-pass-2026-11-13]

Quick start

1. Single point: search an address (Nominatim), type decimal/DMS coordinates, or click the map to drop a pin.
2. Bulk: paste or upload a CSV/TSV with lat/lng columns (auto-detected headers) or one lat,lng per line, then Plot all.
3. Click a marker for address (when reverse-geocoded), decimal + DMS values, and Copy coordinates.
4. Pick two markers in Options to see haversine distance in miles or kilometers.

When to use something else

• Spreadsheet review: Paste latitude and longitude columns to inspect a set of field locations.
• Coordinate check: Enter DMS coordinates and compare the plotted marker with a known point.

Limitations

• Map tiles and geocoding depend on third-party services; straight-line distance is not driving distance.

FAQ

What coordinate formats are accepted?

Decimal degrees, DMS, map clicks, and CSV-style lists are supported for trip plans and field notes. Confirm the datum when exporting to GIS tools that expect a specific system.

Do my pins leave this device?

Coordinates stay local unless you export or share them. Avoid dropping sensitive facility locations into public screenshots.

Can I plot many points at once?

Yes—paste a batch of pins for event maps or survey notes, then adjust individually on the map. Keep labels short so markers stay readable.

Is this a turn-by-turn navigator?

No—it plots places. Use a navigation app for routing; use this when you need a quick custom pin set without creating a full GIS project.

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