JSON Integer Decimal Equivalence Token Tool

Description

Test JSON number grammar first; invalid tokens return false flags and an empty canonical string.

A JSON number's grammar, decimal spelling, and parsed binary value are different layers. Exponents, leading zeros, and negative zero can carry lexical information lost during numeric conversion.

Test JSON number grammar first; invalid tokens return false flags and an empty canonical string.

When to use this tool

Use JSON Integer Decimal Equivalence Token when you need a numeric token's spelling or serialization convention.

How to use the tool and how it works

Enter token. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read validNumberToken, integerValue, canonical. Inspect validNumberToken, integerValue before interpreting the associated values.

Test JSON number grammar first; invalid tokens return false flags and an empty canonical string. Valid tokens convert to a finite Number, report Number.isInteger, and serialize that value.^[1]

Input field	Meaning and units	Accepted input
token	Token	Required. Text; maximum UTF-16 length 8192.

Output field	Interpretation	Returned shape
validNumberToken	Valid Number Token	Required. Boolean.
integerValue	Integer Value	Required. Boolean.
canonical	JavaScript serialization after finite binary Number conversion; may lose decimal precision.	Required. Text; maximum UTF-16 length 8192.

json

{
  "input": {
    "token": "1.0"
  },
  "output": {
    "validNumberToken": true,
    "integerValue": true,
    "canonical": "1"
  }
}

Limitations and assumptions

Large integers can round and tiny values can underflow; canonical is JavaScript numeric serialization, not exact decimal or full JSON canonicalization.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.

Alternative or Complementary methods

Use an exact decimal parser when preserving large integers, decimal scale, or lexical round trips is required.

References

Calculation and input contract: json/json-integer-decimal-equivalence-token — tool.io

Similar or alternative tools

JSON Scalar Nonfinite Serialization Guard
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JSON Number Scale Token
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