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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.

bsondump uses Extended JSON v2.0 (Canonical mode) to format its data.

Run bsondump from the system command line, not the mongo shell.

Starting with MongoDB 4.4, bsondump is now released separately from the MongoDB Server and uses its own versioning, with an initial version of 100.0.0. Previously, bsondump was released alongside the MongoDB Server and used matching versioning.

For documentation on the MongoDB 4.2 or earlier versions of bsondump, reference the MongoDB Server Documentation for that version of the tool:


Quick links to older documentation

This documentation is for version 100.9.0 of bsondump.

bsondump version 100.9.0 supports the following versions of the MongoDB Server:

  • MongoDB 7.0

  • MongoDB 6.0

  • MongoDB 5.0

  • MongoDB 4.4

  • MongoDB 4.2

While bsondump may work on earlier versions of MongoDB server, any such compatibility is not guaranteed.

bsondump version 100.9.0 is supported on the following platforms:

Amazon Linux 2023

Amazon 2

Amazon 2013.03+

Debian 10

Debian 9

Debian 8

RHEL / CentOS 9

RHEL / CentOS 8

RHEL / CentOS 7

RHEL / CentOS 6



Ubuntu 20.04

Ubuntu 18.04

Ubuntu 16.04

Windows 8 and later

Windows Server 2012 and later

macOS 11 and later

macOS 10.12 - 10.15

The bsondump tool is part of the MongoDB Database Tools package:

Follow the Database Tools Installation Guide to install bsondump.


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 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.


Changes the operation of bsondump from outputting "JSON" (the default) to a debugging format.


Outputs documents in a pretty-printed format JSON.


Specifies the path to a BSON file to dump to JSON. --bsonFile is an alternative to the positional <bsonFilename> option.

By default, bsondump reads from standard input.


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


Specifies the path of the file to which bsondump should write its output JSON data.

By default, bsondump writes to standard output.

Run bsondump from the system command line, not the mongo shell.

By default, bsondump outputs data to standard output. To create corresponding JSON files, you can use the --outFile option:

bsondump --outFile=collection.json collection.bson

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

bsondump --type=debug collection.bson
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