Flatten JSON Object
Convert nested JSON objects into a single-level structure with dot-notation keys.
Input (JSON Object)
Options
Output (Flattened Object)
What It Does
Convert nested JSON objects into a flat object using dot notation for keys. Nested properties like {a:{b:{c:1}}} become {'a.b.c':1}, making deep values accessible with simple keys. Essential for data processing, database storage, or working with flat data formats.
Common Use Cases
- Converting nested objects for database storage
- Preparing JSON for flat file formats
- Simplifying deep object access
- Converting JSON to properties-like format
- Processing nested configs as flat key-values
How to Use
- Paste your nested JSON object
- The tool flattens using dot notation
- View keys like 'parent.child.value'
- Copy the flat object structure
Features
- Uses dot notation for nested paths
- Handles arrays with index notation
- Preserves all values
- Produces valid flat JSON object
Examples
Below is a representative input and output so you can see the transformation clearly.
{
"user": {"name": "Ada", "role": "admin"}
}{
"user.name": "Ada",
"user.role": "admin"
}Edge Cases
- Very large inputs may take a few seconds to process in the browser. If performance slows, split the input into smaller batches.
- Mixed formatting (tabs, line breaks, or inconsistent delimiters) can affect output. Normalize spacing first if needed.
- Flatten JSON Object follows the selected options strictly. If the output looks unexpected, re-check option settings and input format.
Troubleshooting
- Output looks unchanged: confirm the input contains the pattern this tool modifies and that the correct options are selected.
- Unexpected characters: check for hidden whitespace or encoding issues in the input and try normalizing first.
- Slow processing: reduce input size or try a modern browser with more available memory.
Tips
Nested {user:{name:'John'}} becomes {'user.name':'John'} for easy single-level access.
Frequently Asked Questions
Is my input stored or logged?
No. This tool is designed to run in your browser, and we do not store or log your content during processing.
Is conversion instant?
Yes for most inputs. Output updates immediately, and large inputs may take a moment depending on your device.
Can this handle large text?
It can handle large text, but performance depends on your browser and device. For very large files, consider splitting the input.
Does it support mobile?
Yes. The interface is responsive and works on phones and tablets, so you can use it on the go.
Can I use it for commercial projects?
Yes. You are free to use the output in personal or commercial projects without attribution.
Does this affect numbers or punctuation?
Only if the selected options target them. Otherwise, numbers and punctuation are preserved as-is.