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Excel JSON converter

Turn JSON rows into an Excel workbook, or read one sheet of an XLSX file as JSON, on your device.

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Excel JSON converter processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Conversion options

Result

JSON uses an array of row arrays so duplicate or blank column headings remain possible. Cell values may be strings, finite numbers, booleans or null. XLSX formulas export as objects containing the formula and its cached result; dates become ISO timestamps. Formatting is omitted.
Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.
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Updated 
Using Excel JSON converter
JSON uses an array of row arrays so duplicate or blank column headings remain possible. Cell values may be strings, finite numbers, booleans or null. XLSX formulas export as objects containing the formula and its cached result; dates become ISO timestamps. Formatting is omitted.
Next: CSV JSON converter
A worked example
The JSON example [["Name","Count"],["Octopus",8]] writes a worksheet where 8 is a number, then preserves that type on export.
Next: JSON formatter
Before you use the result
JSON uses an array of row arrays so duplicate or blank column headings remain possible. Cell values may be strings, finite numbers, booleans or null. XLSX formulas export as objects containing the formula and its cached result; dates become ISO timestamps. Formatting is omitted.
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ToolOctopus. “Excel JSON converter.” Updated 2026-09-29. https://tooloctopus.com/excel-json-converter.
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