Issues

• Ajv strict-mode warnings for propertyNames inside anyOf/oneOf (fjs_type added to propertyNames)

  fastify/fast-json-stringify#896 · Filter by author simonpetty opened on Oct 12, 2026

• Sibling required keyword is dropped when a property uses $ref to an external schema

  bug
  fastify/fast-json-stringify#866 · Filter by author evanmarshall opened on Aug 8, 2026
  1

• JSON.stringify more than twice as fast in V8 v. 13.8

  benchmarkquestion
  fastify/fast-json-stringify#782 · Filter by author cesco69 opened on Aug 29, 2025
  14

• allOf Fails to Handle Array of if/then as Chained else Conditions

  bug
  fastify/fast-json-stringify#778 · Filter by author men232 opened on Jul 8, 2025
  4

• Error using stringify on schema with uri-encoded definition property containing anyOf, allOf or oneOf

  bug
  fastify/fast-json-stringify#740 · Filter by author jonathanmonroe1 opened on Sep 24, 2024
  1

• Multiple fields with anyOf and self ref causes Maximum call stack size exceeded

  bug
  fastify/fast-json-stringify#724 · Filter by author JJCella opened on Jun 20, 2024
  1

• allOf Schema and additionalProperties result in unexpected result

  bug
  fastify/fast-json-stringify#684 · Filter by author artem-kliuev opened on Feb 20, 2024
  10

• When asString receives undefined an exception is thrown

  bug
  fastify/fast-json-stringify#680 · Filter by author kyleaupton opened on Feb 13, 2024
  2

• emit CJS/ESM syntax in standalone mode based on AJV code options

  feature request
  fastify/fast-json-stringify#679 · Filter by author mouhannad-sh opened on Feb 13, 2024
  1

• lack of strictSchema in ajv options results in silent typos

  feature request
  fastify/fast-json-stringify#673 · Filter by author autopulated opened on Jan 10, 2024

• Support of JSON Schema draft 2020-12 (and 2019-09)

  feature request
  fastify/fast-json-stringify#627 · Filter by author fidgi opened on Jun 11, 2023
  4

• Support TypedArrays

  feature request
  fastify/fast-json-stringify#626 · Filter by author joshkel opened on Jun 1, 2023
  1

• oneOf schemas not matching when an object has a custom toJSON() method

  fastify/fast-json-stringify#621 · Filter by author unek opened on Apr 10, 2023
  1

• Use fast-json-escape for string serialization

  question
  fastify/fast-json-stringify#612 · Filter by author ivan-tymoshenko opened on Feb 26, 2023
  2

• TypeCoercion like ajv

  discussion
  fastify/fast-json-stringify#607 · Filter by author Uzlopak opened on Feb 24, 2023
  5

• Object should pass validation after it is modified by if-then-else logic.

  bug
  fastify/fast-json-stringify#550 · Filter by author TommyDew42 opened on Oct 7, 2022
  2

• BigInt serialization error on Integer and Null union type

  bug
  fastify/fast-json-stringify#501 · Filter by author fauh45 opened on Aug 3, 2022
  12

• Empty spaces make JSON string conversion faster

  question
  fastify/fast-json-stringify#467 · Filter by author samchon opened on Jun 19, 2022
  2