JSON to XLSX
Drop in (or paste) a .json file and download a real Excel .xlsx workbook. An array of flat objects becomes a sheet whose headers are the union of object keys (one row per object). An array of arrays becomes a sheet whose rows are the inner arrays — the first inner array is treated as a header row when the option is on. A single object is automatically wrapped in a one-element array. Conversion runs entirely in your browser — your data never leaves your device.
Drop .json file here
or click to choose
Options
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Supports
.json → .xlsx
Related tools
Tools that work with the same formats — most users open one of these next.
XLSX to JSON
Convert an Excel spreadsheet (.xlsx / .xls) to pretty-printed JSON — free online, no upload.
JSON to CSV
Convert a JSON array (or object) into a CSV spreadsheet — free online, no upload.
JSON to YAML
Convert JSON to YAML — free online, no upload.
JSON to XML
Convert JSON to XML — free online, no upload.
JSON to HTML
Pretty-print JSON inside a styled, syntax-highlighted HTML document — free online, no upload.
CSV to XLSX
Convert a CSV file into an Excel .xlsx workbook — free online, no upload.
Frequently asked
Is JSON to XLSX free to use?
Yes. JSON to XLSX is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — JSON to XLSX runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does JSON to XLSX work?
Open JSON to XLSX, drop in your JSON file, choose any options, and click Convert. Your browser does the work locally and produces a XLSX file you can save right away.
What's the maximum file size for JSON to XLSX?
Because JSON to XLSX runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.