Flatten JSON Array
Reduce nesting levels in JSON arrays by flattening nested arrays into a single level.
Input (JSON Array)
Options
Output (Flattened Array)
What It Does
Convert nested arrays within JSON into a single flat array by extracting all elements from sub-arrays. This tool recursively processes arrays like [[1,2],[3,[4,5]]] into [1,2,3,4,5], simplifying complex data structures for easier processing.
Common Use Cases
- Simplifying nested arrays from API responses
- Preparing data for array operations
- Converting hierarchical lists to flat lists
- Processing nested data structures
- Simplifying complex JSON for analysis
How to Use
- Paste your JSON containing nested arrays
- The tool flattens all levels of nesting
- View the single flat array result
- Copy the simplified JSON
Features
- Recursively flattens all nested levels
- Optional depth limit control
- Preserves non-array values
- Produces valid JSON array output
Examples
Below is a representative input and output so you can see the transformation clearly.
[1, [2, [3, 4]]]
[1, 2, 3, 4]
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 Array 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.
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.