Sourced from fast-xml-parser's releases.

Summary update on all the previous releases from v4.2.4

• Multiple minor fixes provided in the validator and parser
• v6 is added for experimental use.
• ignoreAttributes support function, and array of string or regex
• Add support for parsing HTML numeric entities
• v5 of the application is ESM module now. However, JS is also supported

Note: Release section in not updated frequently. Please check CHANGELOG or Tags for latest release information.

Sourced from fast-xml-parser's changelog.

Note: If you find missing information about particular minor version, that version must have been changed without any functional change in this library.

Note: Due to some last quick changes on v4, detail of v4.5.3 & v4.5.4 are not updated here. v4.5.4x is the last tag of v4 in github repository. I'm extremely sorry for the confusion

5.4.2 / 2026-03-03

• support maxEntityCount option

5.4.1 / 2026-02-25

• fix (#785) unpairedTag node should not have tag content

5.4.0 / 2026-02-25

• migrate to fast-xml-builder

5.3.9 / 2026-02-25

• support strictReservedNames

5.3.8 / 2026-02-25

• support maxNestedTags
• handle non-array input for XML builder when preserveOrder is true (By Angelo Coetzee)
• save use of js properies

5.3.7 / 2026-02-20

• fix typings for CJS (By Corentin Girard)

5.3.6 / 2026-02-14

• Improve security and performance of entity processing
  • new options maxEntitySize, maxExpansionDepth, maxTotalExpansions, maxExpandedLength, allowedTags,tagFilter
  • fast return when no edtity is present
  • improvement replacement logic to reduce number of calls

5.3.5 / 2026-02-08

• fix: Escape regex char in entity name
• update strnum to 2.1.2
• add missing exports in CJS typings

5.3.4 / 2026-01-30

• fix: handle HTML numeric and hex entities when out of range

5.3.3 / 2025-12-12

• fix #775: transformTagName with allowBooleanAttributes adds an unnecessary attribute

5.3.2 / 2025-11-14

• fix for import statement for v6

5.3.1 / 2025-11-03

... (truncated)

• f8d4d42 update strnum to fix parsing issues of 0 when skiplike is used
• ab00cdc update package bundle for minor fixes
• 57c6187 Update ReadMe
• caeda37 fix: emit full JSON string from CLI when no output filename specified (#710)
• eadeb7e fix(performance): Update check for leaf node in saveTextToParentTag function ...
• 682066c Update disclaimer
• 280cd63 Fix null CDATA to comply with undefined behavior (#701)
• e132656 update release detail
• 74e2651 Fixes entity parsing when used in strict mode (#699)
• 4082902 Fix empty tag key name for v5 (#697)
• Additional commits viewable in compare view

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