Turn MDB databases into JSON. It is converted in your browser, so the file never leaves your device.
Drop MDB files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop MDB (Access) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the JSON, or download everything as one ZIP if you converted several files.
The MDB to JSON converter is part of this page and runs inside your browser. Your databases are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
MDB opens in a few Microsoft-centric tools and is a legacy format. JSON is what APIs and most programming languages read natively. MDB is at home in legacy Access databases; JSON is the usual choice for APIs and data exchanged between programs.
Every table is read. Queries, forms, reports and macros are not converted, only the data in the tables.
MDB is the format of Microsoft Access up to Access 2003, built on the Jet database engine. It holds tables, queries, forms and reports in one file. Newer versions of Access use ACCDB, and MDB is mostly opened for migration.
Opens in Microsoft Access, LibreOffice Base and the mdbtools utilities
MDB converterJSON represents data as nested objects and lists in plain text. It is the default language of web APIs. Unlike a spreadsheet it can be nested to any depth, which is also why turning it into rows and columns takes a decision about how to flatten it.
Opens in Any text editor, every programming language, browser developer tools
JSON converter| MDBAccess database (2003 and earlier) | JSONJSON data | |
|---|---|---|
| Stands for | Microsoft Access (Jet) database | JavaScript Object Notation |
| Type | Database file | Structured data (text) |
| Compression | Proprietary | None |
| Introduced | 1992, by Microsoft | 2001, by Douglas Crockford |
| Opens in | Microsoft Access, LibreOffice Base and the mdbtools utilities | Any text editor, every programming language, browser developer tools |
| Best for | Legacy Access databases | APIs and data exchanged between programs |
| File extension | .mdb | .json |
No. The MDB to JSON conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The values are kept. Anything JSON has no way to express, such as formatting, formulas or nesting, is simplified or left out.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the MDB file, press Convert and save the JSON. There is nothing to install.
Yes. Binary data files up to 150 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.