GeoJSON Viewer & Simplifier

Paste or upload a GeoJSON file to validate it, preview it on a map, shrink it with Douglas-Peucker simplification, and export it as GeoJSON, KML or CSV.

Your data never leaves this browser

The file is parsed, previewed and charted on your own device. Nothing is uploaded — not even a sample. Close the tab and the data is gone.

GeoJSON

0 keeps every coordinate. Larger values drop points that sit within that distance of the line — handy before shipping a boundary file to the web.

Import a file to get started. Everything runs locally.

How it works

  1. 1.Import an Excel, CSV, TSV or JSON file, or paste the table. It is parsed on your own device.
  2. 2.Pick the columns to show: one category axis and up to three values.
  3. 3.Generate once, then keep tweaking — chart type, aggregation, sorting and theme update instantly.
  4. 4.Download an image, or publish the result as an encrypted link that expires on its own.

Frequently asked questions

Do I get free credits to try GeoJSON Viewer & Simplifier?
Yes — new accounts get 5 free credits to spend on any tool, GeoJSON Viewer & Simplifier included. After that you only pay for what you run.
How many credits does GeoJSON Viewer & Simplifier cost?
Everything runs in your browser and nothing is uploaded: free accounts pay 1 credit per run, and Pro or Pro+ members run it as often as they like.
Is the content I paste private?
GeoJSON Viewer & Simplifier uses your input only to generate the result. Stored results are deleted automatically by our retention policy, and you can remove any run from your history.
Do I need to install anything?
No. GeoJSON Viewer & Simplifier works in any modern browser — nothing to download or install.