Free online SQLITE3 to MDB converter

Applications built around Microsoft Access may require an .mdb database instead of a SQLite file, especially when a legacy workflow, reporting template, or older Windows system cannot open SQLite directly. Converting the data creates an Access-compatible copy, but SQLite queries, constraints, and types may need adjustment.

What the SQLITE3 format is

SQLITE3 usually identifies a database created by SQLite, a self-contained relational database engine embedded in desktop, mobile, browser, and device software. Common creators include Python applications, Android apps, Firefox-based tools, inventory systems, and programs using SQLite libraries in C, Java, .NET, or JavaScript.

The file may use the extension .sqlite3, .sqlite, or .db. It stores tables, indexes, views, triggers, and schema metadata in one file and does not require a database server. SQLite's flexible typing allows values in a column to differ from the declared type.

What the MDB format is

MDB is the Microsoft Access database format used by Access 2000–2003 and the Jet database engine. It is suitable for Access forms, reports, queries, macros, and older Windows applications that use DAO, Jet OLE DB, or the Microsoft Access Driver.

MDB is useful when an existing Access-based application cannot read .sqlite3, when users need to edit records through Access, or when a legacy reporting system accepts only Jet databases. Its principal constraints include a 2 GB maximum file size, Access-era object limits, and weaker type support than SQLite.

How to actually convert SQLITE3 to MDB

Using Microsoft Access and an SQLite ODBC driver

1. Close every application using the SQLite database. If the database uses write-ahead logging, checkpoint it first with the SQLite command-line utility: sqlite3 source.sqlite3 "PRAGMA wal_checkpoint(FULL);". Keep a backup of source.sqlite3.
2. Install a compatible SQLite ODBC driver and create a system or user DSN pointing to the database. The driver must match the Access installation's 32-bit or 64-bit architecture.
3. In Access, create a blank database in the legacy format with File → New → Blank database, then select File → Save As → Access 2002–2003 Database (*.mdb). Alternatively, create a blank destination.mdb directly in an older Access version.
4. Open the MDB and choose External Data → New Data Source → From Other Sources → ODBC Database.
5. Select Import the source data into a new table in the current database, choose the SQLite DSN, and select the required tables. Importing creates editable Access tables; linking leaves the data in SQLite and therefore does not produce a self-contained MDB.
6. Recreate views, triggers, relationships, and complex queries in Access where the import dialog does not transfer them. Open each imported table and verify row counts, primary keys, indexes, dates, text, and numeric values.

Using the built-in online converter

You can convert the file on 101convert.com for free without installing software. Upload the SQLite file, choose MDB as the output format, run the conversion, and download the result. Do not upload databases containing confidential or regulated information unless the service's handling policy is acceptable.

Compatibility and limitations

SQLite's INTEGER, REAL, TEXT, BLOB, and NULL values do not map perfectly to Access types. Large integers may require BIGINT, binary values may need an Access attachment or OLE field, and SQLite date values stored as text may import as text rather than Access Date/Time values.

SQLite foreign keys, triggers, partial indexes, generated columns, window-function queries, and SQLite-specific SQL expressions generally require manual recreation. Access also has reserved words and stricter identifier rules, so table or column names may be changed during import. Check Unicode text, decimal precision, empty strings, Boolean values, and timestamps after conversion.

For a repeatable migration, export each SQLite table to CSV or use a scripted SQLite-to-ODBC transfer, create the MDB schema explicitly, insert rows in batches, and compare source and destination row counts. Preserve the original SQLite file because conversion is a data migration, not a reversible format change.