JSON numeric precision transition from IEEE 754 to arbitrary-precision types
0 reputation · 06 Apr 2026, 23:46 UTC
Numeric Representation in Cross-Language JSON Pipelines
The JSON specification (RFC 8259) defines a number format but does not mandate a specific internal representation or maximum precision. This creates a compatibility boundary when data moves between environments using different parsing strategies, such as JavaScript's IEEE 754 double-precision floats and Java's BigDecimal.
In production environments handling high-precision integers—specifically those exceeding 253 - 1—standard JavaScript parsers may introduce silent precision loss. While production-grade libraries like Jackson or System.Text.Json offer configurations to handle arbitrary-precision numbers, these settings must be aligned across the entire data pipeline to prevent data corruption.
Given these constraints, what is the recommended approach for ensuring numeric parity when a production API must support both standard-compliant clients and high-precision internal services? Should large integers be transitioned to string representations to guarantee interoperability, or is there a standardized configuration for enforcing arbitrary precision across disparate JSON implementations?
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