Convert XLSX to JSON

Convert XLSX files to JSON locally, completely free and with maximum privacy.

Drag and drop your files here

or click to browse local files (large files supported, limited only by browser RAM)

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How to convert XLSX to JSON

Drop your .xlsx files above, or click Upload Files. You can add many files at once.
JSON is already selected as the output. Open the settings (gear icon) to fine-tune the result.
Click Convert All. SheetJS runs inside your browser through WebAssembly; nothing is uploaded.
Download your .json files as soon as each one finishes.

What to know about XLSX to JSON conversion

JSON holds a single table: convert the active sheet only, or all sheets at once (as one JSON object keyed by sheet name).
Cell values are exported as they were last calculated; formulas, formatting and charts are not part of the output.
JSON is best for APIs, JavaScript apps and data pipelines, and opens in code editors, browsers and every programming language.

XLSX vs JSON

Feature	XLSX (Excel Workbook)	JSON (JSON Table)
Multiple sheets	Yes	No
Formulas and formatting	Yes	No
Best for	everyday spreadsheets shared with Excel users	APIs, JavaScript apps and data pipelines
Opens in	Excel, Google Sheets, LibreOffice and Numbers	code editors, browsers and every programming language

XLSX (Excel Workbook): The default Microsoft Excel workbook format since Office 2007, based on Office Open XML.

JSON (JSON Table): Tabular data as a JSON array of row objects, ideal for APIs and JavaScript applications.

Conversion options

Active sheet only or all sheets
Custom output file name

Frequently asked questions

Is it safe to convert XLSX to JSON here?

Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.

Is there a file size limit?

There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.

Can I convert several XLSX files at once?

Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.

Related conversions

Need the opposite? Convert JSON to XLSX.

Convert XLSX to other formats

Convert other formats to JSON

See every XLSX converter and JSON converter, or browse the full converter directory.