Free Converter

BSON to JSON Converter

Convert BSON binary files and MongoDB Extended JSON to standard JSON format. Free, client-side, instant conversion.

Drag & Drop .bson file here

Supports .bson binary files and Extended JSON. Max 50MB.

Or

Extended JSON → JSON

Paste MongoDB Extended JSON (with $oid, $date, $numberLong etc.) and convert to plain JSON.

About This Tool

Convert BSON files to JSON format instantly in your browser. BSON (Binary JSON) is best suited for MongoDB data storage, binary-encoded JSON, while JSON (JavaScript Object Notation) is ideal for APIs, configuration files, data exchange in web applications. All processing runs locally in your browser — your files are never uploaded to any server.

How to Use

  1. Paste your BSON data into the input area, or upload a BSON file.
  2. The tool will automatically parse and convert the data structure.
  3. Review the converted JSON output in the result panel.
  4. Click Copy to clipboard or Download to save the JSON file.

Frequently Asked Questions

Does converting BSON to JSON change the content?
The content is preserved as accurately as possible. However, some format-specific features may not have direct equivalents, so minor formatting differences can occur.
Why convert data to JSON format?
JSON is the standard data format for web APIs and JavaScript applications. It's human-readable, widely supported by programming languages, and has a simpler syntax than XML.
Does the converter handle nested or complex BSON structures?
Yes. The tool correctly parses nested objects, arrays, and all standard BSON data types, preserving the full data structure in the JSON output.
Is this conversion secure and private?
Yes. All processing happens locally in your browser. Your data never leaves your device — no server upload, no cloud processing, no data collection.