bsondump man page

bsondump — MongoDB BSON Utility


The bsondump converts BSON files into human-readable formats, including JSON. For example, bsondump is useful for reading the output files generated by mongodump.


bsondump is a diagnostic tool for inspecting BSON files, not a tool for data ingestion or other application use.


Changed in version 3.0.0: bsondump removed the --filter option.



Returns information on the options and use of bsondump.
--verbose, -v
Increases the amount of internal reporting returned on standard output or in log files. Increase the verbosity with the -v form by including the option multiple times, (e.g. -vvvvv.)

Runs the bsondump in a quiet mode that attempts to limit the amount of output.

This option suppresses:

output from database commands
replication activity
connection accepted events
connection closed events
Returns the bsondump release number.
Validates each BSON object before outputting it in JSON format. By default, bsondump enables --objcheck. For objects with a high degree of sub-document nesting, --objcheck can have a small impact on performance. You can set --noobjcheck to disable object checking.

Changed in version 2.4: MongoDB enables --objcheck by default, to prevent any client from inserting malformed or invalid BSON into a MongoDB database.

New in version 2.4.

Disables the default document validation that MongoDB performs on all incoming BSON documents.

--type <=json|=debug>
Changes the operation of bsondump from outputting "JSON" (the default) to a debugging format.

New in version 3.0.0.

Outputs documents in a pretty-printed format JSON.

The final argument to bsondump is a document containing BSON. This data is typically generated by bsondump or by MongoDB in a rollback operation.


By default, bsondump outputs data to standard output. To create corresponding JSON files, you will need to use the shell redirect. See the following command:

bsondump collection.bson > collection.json

Use the following command (at the system shell) to produce debugging output for a BSON file:

bsondump --type=debug collection.bson


MongoDB Documentation Project


mongodb-manual 3.0 January 30, 2015