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compressed-json
Advanced tools
String base JSON compressor
If you seriously want to reduce your data size, consider using msgpack.
Use compressed-json only if you cannot handle binary for some reason.
npm i compressed-json
'use strict'
const cjson = require('compressed-json')
// Convert json object
const compressed = cjson.compress({ /* Large json */ })
const restored = cjson.decompress(compressed)
// Convert json string
const compressedString = cjson.compress.toString({ /* Some large json */ })
const restoredFromString = cjson.decompress.fromString(compressedString)
compressed-json has two logics:
example-src.json
{
"description": "This is example json",
"entities": [
{
"id": 100,
"name": "Dog",
"desc": "This is desc of dog",
"tag": ["animal"]
},
{
"id": 101,
"name": "Cat",
"desc": "This is desc of cat",
"tag": ["animal"]
}
],
"notes": [
"Unique string will be kept as is",
"Duplicated string will be combined",
"Duplicated string will be combined",
"p: string start with 'p:' will be escaped "
]
}
example-compressed.json
{
"_": {
"0": "This is example json",
"1": [
{
"2": 100,
"3": "Dog",
"4": "This is desc of dog",
"5": [
"p:0"
]
},
{
"2": 101,
"3": "Cat",
"4": "This is desc of cat",
"5": [
"p:0"
]
}
],
"6": [
"Unique string will be kept as is",
"p:1",
"p:1",
"e:p: string start with 'p:' will be escaped "
]
},
"K": [
"description",
"entities",
"id",
"name",
"desc",
"tag",
"notes"
],
"P": [
"animal",
"Duplicated string will be combined"
]
}
Key | Description |
---|---|
K | Array of original keys. Object keys are replaced with index of K in the compressed json |
P | Pointed string values. Values are replaced with index of P in the compressed json |
_ | Compressed payload. Keeps original structure, but keys and values may be replaced with pointers to K or P |
All object keys are replaced with index of array stored in K
of compressed JSON.
The more same key appears in original json, the more better compression.
String values appeared at least two will replaced with pointer string with contains index of array stored in P
of compressed JSON.
The more same string value appears in original json, the more better compression.
FAQs
String base JSON compressor
The npm package compressed-json receives a total of 4,664 weekly downloads. As such, compressed-json popularity was classified as popular.
We found that compressed-json demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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