compress-geojson
Abreviates GeoJSON keys like properties, geometry, coordinates to minimize the overhead. Is really slow for large files due to the recursive function and fails if there are already properties like: 't','g','p', 'c','f'
For a large FeatureCollection of 3,5MB (ca. 10.000 features), the compressed Collection had about 2,8MB.
Usage
npm install compress-geojson
var compressGeojson = require('compress-geojson');
var compressed = compressGeojson.compress(geojsonFeature);
var decompressed = compressGeojson.decompress(compressed);