Sourced from org.jetbrains.kotlinx:kotlinx-serialization-json's releases.

1.11.0

This release is based on Kotlin 2.3.20 and provides a new Json exceptions API and some bugfixes and improvements.

Expose Json exceptions structure

To make working with exceptions easier and providing proper error codes in e.g., REST APIs, classes JsonException, JsonDecodingException, and JsonEncodingException are now public. They have relevant public properties, such as shortMessage, path, offset, and others. This API is currently experimental, and we're going to improve it further in the subsequent releases. See the linked issues for the details: #1930, #1877.

Ability to hide user input from exception messages for security/privacy reasons.

Historically, exception messages in kotlinx.serialization often included the input Json itself for debuggability reason. Such behavior may pose additional challenges for logging, analytics, and other systems, since a system is not always allowed to store user data due to privacy/security reasons, which imposes additional sanitation logic. To address this issue, a new property exceptionsWithDebugInfo is added to JsonConfiguration. Disable it to hide user input from exception messages. IMPORTANT: This behavior will be enabled by default when this property becomes stable. See #2590 for more details.

Bugfixes and improvements

• CBOR: Relax value range check when decoding numbers (#3167)
• Use a specialized writeDecimalLong method for IO stream integrations in Json (#3152)

Sourced from org.jetbrains.kotlinx:kotlinx-serialization-json's changelog.

1.11.0 / 2026-04-10

This release is based on Kotlin 2.3.20 and provides new Json exceptions API and some bugfixes and improvements.

Expose Json exceptions structure

To make working with exceptions easier and providing proper error codes in e.g., REST APIs, classes JsonException, JsonDecodingException, and JsonEncodingException are now public. They have relevant public properties, such as shortMessage, path, offset, and others. This API is currently experimental, and we're going to improve it further in the subsequent releases. See the linked issues for the details: #1930, #1877.

Ability to hide user input from exception messages for security/privacy reasons.

Historically, exception messages in kotlinx.serialization often included the input Json itself for debuggability reason. Such behavior may pose additional challenges for logging, analytics, and other systems, since a system is not always allowed to store user data due to privacy/security reasons, which imposes additional sanitation logic. To address this issue, a new property exceptionsWithDebugInfo is added to JsonConfiguration. Disable it to hide user input from exception messages. IMPORTANT: This behavior will be enabled by default when this property becomes stable. See #2590 for more details.

Bugfixes and improvements

• CBOR: Relax value range check when decoding numbers (#3167)
• Use a specialized writeDecimalLong method for IO stream integrations in Json (#3152)

• 6956af2 Prepare 1.11 release
• 390d84c Merge remote-tracking branch 'origin/master' into dev
• 431fe2d Use local repo for publishing (#3171)
• 05c12b6 Add usage attribute to "testRepositories" configuration
• a4e1f08 Bump Kover version to 0.9.8 release (#3174)
• 304e858 Expose Json exceptions structure (#3145)
• 4a0338e Included G Play SDK verification file for core-jvm (#3169)
• 421f64c CBOR: Relax value range check when decoding numbers (#3167)
• 85a4f12 KT-84955: mark apple x64 tagets as deprecated error
• bd38b0e Remove dead code
• Additional commits viewable in compare view