How it works
Complete the job in three clear steps
- Add an XLSX spreadsheet to the local workspace.
- Choose the available options and create a JSON array.
- Review, copy, or download the result before leaving the page.
Private Lucaden office & spreadsheets tool
Excel to JSON Converter
Convert an XLSX worksheet into formatted JSON objects using the first row as field names.
Free to use Your source content is processed in this browser and is not uploaded to Lucaden.
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Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
The first nonempty row becomes the object-key row and each following row becomes a JSON record. Empty cells are represented consistently so table shape remains clear.
The transformation happens in browser memory and produces a new result without changing the source on your device.
Included capabilities
- Worksheet selection
- Header-row mapping
- Formatted JSON preview
- Local JSON download
Useful for
- Prototype API data
- Convert business exports
- Inspect workbook records
- Create fixtures from spreadsheets
Questions
About this tool
What if headers are duplicated?
Duplicate or blank headers are made unique so values are not overwritten.
Are dates converted?
Recognized date cells are emitted as ISO strings for predictable machine use.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.