PostgreSQL to Firebird Converter

Move PostgreSQL tables and rows into a Firebird database, with a type-mapping review and saved jobs you can run again.

Version: 5.4.0
Release Date: Oct. 25, 2026
Size: 22.8 MB
Platform: Windows 10 or later

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Copy a PostgreSQL database into Firebird without writing the target schema by hand. DBConvert connects to PostgreSQL and to the Firebird server, proposes a Firebird type for every column, and creates the tables before it moves a row.

Reads PostgreSQL on your own server, Amazon RDS / Aurora, Azure Database for PostgreSQL, Google Cloud SQL, or Supabase.
Writes to a database on a local or remote Firebird server, named by its path on that server or by its alias.
The same download is the Firebird to PostgreSQL converter, so a database can go out and come back with one product.
Runs on Windows as a desktop application.

How it runs

A Windows application that talks to both servers

You install it, point it at PostgreSQL and at the Firebird server, and transfer directly between the servers. Connections, tables, and mappings remain available on separate screens as you refine the job.

A path, not a database name

Firebird has no list of databases to pick from. You enter the server's host and the target database's path on that server, or its alias, together with the connection character set - UTF8 is offered first.

Choose the dataset

Select the tables you need and apply per-table row filters when only part of the PostgreSQL data belongs in Firebird.

Saved and repeatable

A job stores both connections, the table selection, and the options. Run it again from the interface, or start it by name from a batch file or Task Scheduler with --run-job.

What needs attention

How DBConvert handles the PostgreSQL → Firebird differences

Every mapping below is a default you can review or override per column before the run.

In PostgreSQL	Why it does not carry over	What DBConvert does
`NUMERIC(p,s)`	Firebird 4 and 5 support up to 38 digits; Firebird 3 supports up to 18.	DBConvert checks the destination server version. On Firebird 4 or newer, `NUMERIC(38,10)` becomes `DECIMAL(38,10)`. On Firebird 3, wider declarations are limited to 18 digits and reported before the run. Resolve the capacity mismatch before loading: values requiring more digits may be stored incorrectly.
`SERIAL`, `BIGSERIAL`	PostgreSQL draws the next key from a sequence; Firebird needs a generator and a trigger, or an identity column.	Created as `INTEGER` or `BIGINT` with the key values copied. No generator is created, so add one before the application starts inserting.
`TEXT`, `JSON`, `JSONB`	Firebird has no unbounded text column and no JSON type.	Become `BLOB SUB_TYPE TEXT`. Use a `UTF8` target connection for the text-BLOB writer. JSON arrives as text; PostgreSQL's JSON operators need application-side changes.
`BYTEA`, arrays	Firebird has native arrays, but DBConvert does not map PostgreSQL arrays to them.	Both become `BLOB SUB_TYPE BINARY`. If the application needs the array elements one by one, plan a child table.
`UUID`, enum types	Firebird has neither a UUID type nor user-defined enums.	Become `VARCHAR`, holding the value as text.
`TIMETZ`, `INTERVAL`	A time with an offset, and a duration - neither has a Firebird column type chosen for it here.	`TIMETZ` becomes `TIMESTAMP` and `INTERVAL` becomes `VARCHAR(255)`, holding the interval as text.

Procedural code stays behind

The migration covers tables - their fields, types, defaults, and indexes. PL/pgSQL functions, triggers, and extension-backed objects stay in PostgreSQL and are rewritten by hand in Firebird PSQL, along with application SQL that uses ILIKE, ON CONFLICT, or :: casts.

Where this tool stops

There is no SSH tunnel on the Firebird side: the Firebird server's port, 3050 by default, has to be reachable from the machine running DBConvert. Run a test job on a copy before switching the application to the Firebird database.

Supported versions and services

PostgreSQL

PostgreSQL 8.x through 17.x
Amazon RDS / Aurora for PostgreSQL, Azure Database for PostgreSQL, Google Cloud SQL, Supabase
PostgreSQL schemas (public, custom schemas)

Firebird

Firebird 2.x, 3.x, 4.x, 5.x

DBConvert Studio

30+ databases · cloud · scheduled sync

Need more database pairs? One tool covers 30+ databases.

How to migrate PostgreSQL to Firebird

Setup: connect PostgreSQL and Firebird

Pick Convert or Sync, then choose the source and destination connections side by side on one screen. A connection is saved once and reused by every job.

The Setup step in DBConvert: the mode, the PostgreSQL source and Firebird destination side by side, and the job name

Sync keeps an existing Firebird database up to date with PostgreSQL: each run carries only the inserts, updates and deletes since the last one.

The Setup step in Sync mode for PostgreSQL to Firebird: how changes are detected and the direction

PostgreSQL source

Read from self-hosted PostgreSQL, Amazon RDS / Aurora for PostgreSQL, Azure Database for PostgreSQL, or Google Cloud SQL.

Firebird target

Enter the Firebird server's host and the path of the target database on that server, or its alias — Firebird target settings.

Tables & mapping: see every Firebird type before a row moves

Pick the tables, then open one: each PostgreSQL column shows the Firebird type it becomes. Change a type or a name in place; the line at the bottom names anything that would fail.

Tables and mapping for PostgreSQL to Firebird: the table list and one table's columns with their Firebird types

Every option, in the guide

Naming rules, table options, row filters, scheduling and the command line work the same for every database pair, so they live in one place.

Open the full guide

See all features

Move PostgreSQL data into Firebird

Download the current build and run the first job against your own database.

Download DBConvert 5.4.0 Order from US$ 199

Windows 10 or later · 22.8 MB