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Skip to contentInteractive MapLibre preview for GeoJSON features.
Full tool — runs in your browser. No sign-up required.
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Interactive MapLibre preview for GeoJSON features.
Developer utilities should be fast, copy-friendly, and predictable. Paste or drop input, get a reliable result — no CLI install required.
Use this free GeoJSON Preview whenever you need a browser-local result without creating an account.
Open the tool
Provide your input
Review and download the result
Processing stays in your browser unless the tool notes otherwise.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
Interactive MapLibre preview for GeoJSON features. Open the tool in your browser — no account or install required.
Yes — runs locally in your browser.
No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.
Map & Geo Studio online — free in your browser
GeoJSON, coordinates and distance tools. Tentaco Map & Geo Studio: review input and get an instant result — free, no sign-up.
GeoJSON Formatter — pretty-print map data
Format and validate GeoJSON with feature stats. Tentaco GeoJSON Formatter: review input and get an instant result — free, no sign-up.
Distance Calculator online — free
Great-circle distance between coordinates. Tentaco Distance Calculator: review input and get an instant result — free, no sign-up.
Reality Lab online — free
Local-first experiments — particle life, orbits, quantum circuits and kinetic art.
GeoJSON Draw online — free
Draw points, lines and polygons and export GeoJSON.
Automation Studio online — free
Workflow presets and auto-pipelines. Tentaco Automation Studio: review input and get an instant result — free, no sign-up.
H3 Hexagons online — free
Generate Uber H3 hexagon cells for a location or area.
3D & CAD Light online — free in your browser
Preview STL and OBJ meshes locally. Tentaco 3D & CAD Light: review input and get an instant result — free, no sign-up.