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GIS Browser Extensions / GeoJSON Tools
GeoPeek - GeoJSON Quick Viewer for Chrome
Preview GeoJSON files instantly with map preview, feature count, geometry summary, bounding box, center coordinate, and fields.
Manual installation is required because this version is distributed directly from GISITTools, not Chrome Web Store.
What is GeoPeek?
GeoPeek is a lightweight Chrome extension by GISITTools that helps GIS developers, GIS analysts, students, and web map users quickly inspect GeoJSON files without opening desktop GIS software.
No upload is required. Files are processed locally in the browser, making GeoPeek useful before opening QGIS, importing into PostGIS, or uploading data to online tools.
Privacy-first by default
GeoPeek reads your GeoJSON inside Chrome and does not send your data to GISITTools or any other server.
Key Features
Exactly the quick checks GIS users need before deeper analysis.
Load .json and .geojson files
Inspect standard GeoJSON and JSON file extensions.
Read raw GeoJSON from current tab
Parse visible raw GeoJSON in Chrome when permissions allow.
Mini map preview
Preview points, lines, polygons, and multipolygons.
Feature count
Check dataset size before using the file.
Geometry type summary
Review geometry counts and missing geometry warnings.
Bounding box display
See min longitude, min latitude, max longitude, and max latitude.
Center coordinate display
Find the dataset center coordinate at a glance.
Field/property scan
Inspect property names, value types, and samples.
Copy BBox, center, summary, and fields
Move useful metadata into maps, APIs, and notes quickly.
Local browser processing
Your GeoJSON is processed inside your browser.
No upload, no tracking, no analytics
GeoPeek is built for quiet, private inspection.
Why Use GeoPeek?
GeoPeek is built for quick GIS checks that happen before deeper analysis. It helps you check if a GeoJSON file is valid, see feature count before using data, copy bbox for map or API work, inspect fields before importing into PostGIS or QGIS, preview Point, LineString, Polygon, and MultiPolygon data, and debug web mapping datasets.
Validate GeoJSON structure
Check extent and center
Inspect attributes
Debug web mapping data
Step-by-Step Installation
Download, extract, and install GeoPeek manually with Chrome Developer Mode.
- Download GeoPeek ZIPDownload the ZIP file from GISITTools.
- Extract the ZIP fileExtract it to a normal folder on your computer.
- Open Chrome Extensions pageOpen chrome://extensions.
- Enable Developer modeTurn on Developer mode in Chrome Extensions.
- Click Load unpackedUse the Load unpacked button.
- Select extracted geopeek-geojson-viewer folderSelect the folder that contains
manifest.json. - Pin GeoPeek in Chrome toolbarUse Chrome's extensions menu to pin GeoPeek.
- Open GeoPeek and drag a .geojson fileDrop a GeoJSON file to preview it instantly.
Chrome may show a developer mode warning because this extension is installed manually and not from Chrome Web Store. This is normal for manual testing versions.
Installation Screenshots
Follow the manual setup flow visually.
Step 1
Open Chrome Extensions
Click the Chrome address bar and open chrome://extensions.
Step 2
Enable Developer Mode
Turn on Developer mode in Chrome Extensions.
Step 3
Load Unpacked
Click the Load unpacked button.
Step 4
Select GeoPeek Folder
Select the extracted geopeek-geojson-viewer folder.
Step 5
Pin Extension
Pin GeoPeek from the Chrome extensions menu.
Step 6
Preview GeoJSON
Open GeoPeek and drag a .geojson file.
Local File Access
If you want to preview file:/// GeoJSON pages, open chrome://extensions, click Details on GeoPeek, and enable Allow access to file URLs.
Drag and drop works without enabling file URL access.
Best first test
Install GeoPeek, open the popup, and drag one of the sample GeoJSON files into the drop area.
Privacy
GeoPeek processes your GeoJSON files locally in your browser. It does not upload, store, sell, or share your data.
The extension does not use analytics, tracking, or personal data collection. Chrome local storage is used only for extension preferences and temporary full-preview transfer inside the extension.
FAQ
Is GeoPeek free?
Yes, this manual version is free to download from GISITTools.
Does GeoPeek upload my GeoJSON files?
No. Files are processed locally in your browser.
Why is Chrome asking for Developer Mode?
Because this version is manually installed instead of Chrome Web Store.
Can I use local files?
Yes, drag and drop works. For file:/// tab detection, enable Allow access to file URLs.
Does it support Shapefile or KML?
Not yet. Current version focuses on GeoJSON.
Does it need internet?
Core preview works locally. Optional online basemaps may request map tile images only when selected.
Download GeoPeek Manual ZIP
Download, extract, and load the extension manually in Chrome using Developer mode.