Open .mdb Files Online — Free LMDB Viewer
Open LMDB File Online — Free & Instant
No signup required. Works in your browser.
📁 Drag & drop your file here
or click to browse • Max 100MB
✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install
What Is a .mdb File?
A .mdb file is a database format known as LMDB. Lightning Memory-Mapped DB This format is created by Howard Chu and is widely used by DBAs and backend engineers.
LMDB files contain structured database data that requires compatible software to open. With OpenAnyFile, you can query and browse .mdb files directly in your browser without installing any software.
How to Open .mdb Files Online
- Visit OpenAnyFile LMDB page
- Drag and drop your .mdb file onto the upload area, or click "Browse" to select it
- OpenAnyFile automatically detects the LMDB format using magic byte analysis
- View, analyze, and query and browse your file contents in the browser
- Optionally convert to CSV, JSON or download
Software That Opens .mdb Files
.mdb files are primarily created by Howard Chu. In the database space, you may encounter .mdb files from third-party tools, online converters, or export functions. Regardless of the source, OpenAnyFile handles them all.
Open .mdb on Different Platforms
- Windows: Use the original software or upload to OpenAnyFile for instant access
- macOS: Preview may not support .mdb — use OpenAnyFile as a universal viewer
- Linux: Open-source alternatives exist, or use OpenAnyFile in any browser
- Mobile (iPhone/Android): OpenAnyFile works on all mobile browsers
Common .mdb File Problems
Memory mapping requirements
Other common issues include: your OS not recognizing the file extension, the file appearing corrupted after download, or lacking the required software. OpenAnyFile bypasses all these issues with universal format detection.
Convert LMDB to Other Formats
LMDB files can be converted to 2 formats including CSV, JSON.
Related Database Formats
If you work with .mdb files, you may also encounter these database formats:
- ACCDB (.accdb) — Open & convert .accdb files online
- BOLTDB (.db) — Open & convert .db files online
- BSON2 (.bson) — Open & convert .bson files online
- CASSANDRA (.db) — Open & convert .db files online
- Cassandra SSTable (db) — Open & convert db files online
- CDB (.cdb) — Open & convert .cdb files online
- ClickHouse (clickhouse) — Open & convert clickhouse files online
- COUCHDB (.couch) — Open & convert .couch files online
- CouchDB View (couchdb) — Open & convert couchdb files online
- DB (.db) — Open & convert .db files online
Popular LMDB Conversions
Frequently Asked Questions
What is a .mdb file?
A .mdb file is a database format called LMDB. Lightning Memory-Mapped DB
How do I open a .mdb file without installing software?
Upload your .mdb file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .mdb files?
.mdb files are typically created by Howard Chu.
Can I convert .mdb to another format?
Yes. OpenAnyFile converts .mdb to CSV, JSON.
Is it safe to open .mdb files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .mdb on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.