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JSSONV0.0.6

Configuration with Superpowers

Write logic, not JSON. Presets, validators, HTTP server and LSP support. One source for JSON, YAML, TOML, and TypeScript.

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Evolution & Maintenance

Constant Innovation.
Version by Version.

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v0.0.6Latest
Dec 25, 2025

Presets, Validators, LSP & Introduction Http Server

The last pre-alpha release. Introduces presets for reusable config, Http Server, validators for auto-generated data, and full LSP support for VS Code.

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v0.0.5.2
Dec 02, 2025

Variable Arithmetic Fix

Improved stability in mathematical operations and variable resolution.

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v0.0.5.1
Nov 29, 2025

Parser Bug Fixes

Fixed chained ternary expressions, negative ranges, and error reporting.

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v0.0.5
Nov 28, 2025

Nested Logic Power-Up

Massive updates to Maps, Ranges, and complex Logic generation.

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v0.0.4
Nov 26, 2025

Universal Meta-Format

Multi-output support: JSON, YAML, TOML, and TypeScript exports.

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v0.0.3
Nov 25, 2025

Arrays in Objects

Support for nested arrays within object properties and real-world templates.

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v0.0.2
Nov 24, 2025

Arithmetic & Logic

Introduction of Variables, Comments, and simplified syntax.

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v0.0.1
Nov 23, 2025

Initial Release

The birth of JSSON. Core parser and basic configuration logic.

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Features

Stop repeating yourself in JSON. Upgrade to JSSON.

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01

Built-in HTTP Server

Instantly serve your configuration across your infrastructure with a production-ready emmbeded server.

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Presets & Reusability

Define reusable configuration blocks once and apply them everywhere with @preset and @use.

03

Auto-Generated Data

Integrated validators for UUIDs, emails, dates, and IPs. Perfect for realistic test data.

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Universal Output

Write once, export everywhere. Convert JSSON into JSON, YAML, TOML, or TypeScript.

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Variables

Declare values once and reuse them throughout your config. Zero duplication.

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Templates

Define models once and instantiate them with spreadsheet-style rows.

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Advanced Maps

Transform values declaratively. Generate derived fields and dynamic objects.

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Smart Ranges

Generate massive datasets with 1..10000 and range-driven maps instantly.

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Natural Booleans

Pick your style: use yes/no or on/off as intuitive alternatives to true/false.

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Professional LSP

Full IDE support with real-time diagnostics, auto-complete, and go-to-definition.

Showcase

Powerhouse data generation. Zero repetition.

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Nested Maps

25 numbers / 1 line

Matrix Generation

// Multiplication table 5x5
rows := 5
cols := 5
 
table = (1..rows map (row) = (
1..cols map (col) = row * col
))
1
2
3
4
5
2
4
6
8
10
3
6
9
12
15
4
8
12
16
20
5
10
15
20
25

Product Variants

6 variants auto

E-commerce Power

products = (["S", "M", "L"] map (size) = (
["Red", "Blue"] map (color) = {
sku = size + "-" + color
price = 29.99
}
))
S-Red
$29.99
S-Blue
$29.99
L-Red
$29.99
L-Blue
$29.99

Massive Generation

1,000 records

Large Datasets

totalUsers := 1000
users = (0..(totalUsers - 1) map (id) = {
id = id
username = "user_" + id
tier = id < 100 ? "bronze" : "silver"
})
1k
Records Generated

API Endpoints

Full CRUD

Route Generation

resources := ["users", "posts", "comments"]
methods := ["GET", "POST", "PUT", "DELETE"]
 
routes = (resources map (r) = (
methods map (m) = {
path = "/api/" + r
method = m
}
))
GET/api/users
POST/api/users
PUT/api/users
DEL/api/users

Schedule Slots

24 slots / 3 lines

Time Generation

startHour := 9
endHour := 17
slotMinutes := 30
 
slots = (startHour..endHour map (h) = (
[0, slotMinutes] map (m) = h + ":" + m
))
09:00
09:30
10:00
10:30
11:00
11:30
12:00
12:30

Feature Flags

Env-aware

Conditional Config

env := "production"
 
features = {
darkMode = true
betaFeatures = env != "production"
maxUpload = env == "dev" ? 100 : 10
analytics = env == "production"
}
darkModeON
betaOFF
analyticsON

Presets & @use

DRY Config

Reusable Infrastructure

@preset "api-tier" {
timeout = 30
retries = 3
}
 
prod = @use "api-tier" {
endpoint = "/v1"
replicas = 5
}
AUTH SERVICE@USE(API)
Timeout: 30sRetries: 3
PAYMENT SERVICE@USE(API)
Timeout: 30sRetries: 3

Smart Validators

Auto-Generated

Realistic Mock Data

user {
id = @uuid
email = @email
createdAt = @datetime
status = @bool ? "up" : "down"
}
uuid: 550e8400-e29b...
user_kx7m@example.com
Active Now

Embedded Server

API Ready

Production-Ready Serving

# Start the server
jsson --serve --port 8080 -i prod.jsson
 
# Fetch from any service
curl http://localhost:8080/config
$ jsson --serve
Listening on :8080...
GET /config - 200 OK

Universal Logic

Write Logic.
Get Config.

JSSON brings power to your configuration. No more manual copying.

Native variables & constants
Arithmetic & Conditional Logic
Templates & Maps for complex arrays
Smart Ranges with steps
Modular configuration (include)
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Input JSSON
// Define reusable configuration
@preset "http-defaults" {
timeout = 30
retries = 3
ssl = yes
}
 
// Instantiate with custom values
api = @use "http-defaults" {
endpoint = "/v1"
timeout = 60
}
 
db = @use "http-defaults" {
endpoint = "/db"
ssl = no
}
Output
{
"api": {
"timeout": 60,
"retries": 3,
"ssl": true,
"endpoint": "/v1"
},
"db": {
"timeout": 30,
"retries": 3,
"ssl": false,
"endpoint": "/db"
}
}

FAQ

Questions. Answered.