# wal2json — PostgreSQL extension compatibility with PostgreSQL major versions

For wal2json, supported postgresql versions is PostgreSQL 9.4+; oldest postgresql version supported is 9.4, recorded from its source on 2026-08-31; source re-checked 2026-09-14.

- **Extension:** wal2json _(our reading, not quoted from the source)_
- **Supported PostgreSQL versions:** PostgreSQL 9.4+ _(verified: appears in the quote below)_
- **Oldest PostgreSQL version supported:** 9.4 _(our reading, not quoted from the source)_

## What the source says

> Before installing **wal2json**, you should have PostgreSQL 9.4+ installed (including the header files).

## Source

- https://raw.githubusercontent.com/eulerto/wal2json/master/README.md

Last verified: 2026-09-14. Review by: 2026-12-29.
Part of [PostgreSQL extension compatibility with PostgreSQL major versions](https://referencesource.org/postgres-extension-postgresql-version-compatibility/).