isjson

A tiny Go module for lightweight JSON detection.

Overview

isjson.IsJSON([]byte) provides a fast heuristic to check whether a byte slice looks like a JSON object. If it looks like JSON, it probably is - that's the philosophy. Designed for speed over precision, it's ideal for scenarios where making decisions on appearance is good enough.

Caveats

• This is a heuristic, not a parser.
• It won't catch malformed JSON or deeply nested issues.
• Best used when performance matters and input is reasonably well-formed.
• Not suitable for strict validation or security-critical contexts.

Example

package main

import (
    "fmt"
    "github.com/dbnski/isjson"
)

func main() {
    good := []byte(`{"hello":"world"}`)
    bad := []byte(`not json at all`)

    fmt.Println("Good input:", isjson.IsJSON(good)) // true
    fmt.Println("Bad input:", isjson.IsJSON(bad))   // false
}