XLSX to JSON Converter
Convert Excel spreadsheets to JSON in your browser. JSON is ideal when you need developers, automation, and app data interchange, while XLSX is better known for formulas, multiple sheets, and rich spreadsheet features.
- Files never uploaded
- Instant, on-device
- Free & no sign-up
Drop XLSX files here, or browse
XLSXJSON · files stay on your device
up to 50 MB per file · up to 20 files per batch
How to convert XLSX to JSON
- Step 01
Add your XLSX file
Drop one or many XLSX files onto the converter, or browse from disk. Stay within the on-device size limits shown under the drop zone — oversized files are rejected so your tab does not freeze.
- Step 02
Run the conversion
Start the XLSX → JSON conversion. Parsing and rendering happen in your browser tab, which keeps contracts and spreadsheets off remote servers.
- Step 03
Download JSON
Download your new JSON file immediately. Multiple outputs pack into a single ZIP archive.
Why convert XLSX to JSON
Spreadsheets become structured JSON records so web apps and scripts can consume rows without a CSV middle step. Headers map to object keys for each data row.
When to use this tool
- You are feeding configuration or catalog data into an application.
- You prefer JSON over CSV for nested-friendly tooling.
- You want to validate sheet content in a code editor.
Good to know
- Formulas are resolved to values when possible; live Excel formulas are not preserved.
- Dates may serialize as serial numbers or strings depending on cell types.
- Very large sheets need adequate browser memory.
- Browser limit: about 50 MB per file, up to 20 files per batch. PDFs are capped at 50 pages; large sheets at about 100,000 rows.
- Need a bigger file? For bigger PDFs or workbooks, use Adobe Acrobat, LibreOffice, Microsoft Office, or a desktop batch tool, then convert a trimmed copy here if you only need a quick private pass.
File size limits for XLSX to JSON
Browser limit: about 50 MB per file, up to 20 files per batch. PDFs are capped at 50 pages; large sheets at about 100,000 rows.
Why there is a limit
Documents are parsed and rendered entirely in your browser tab. Oversized PDFs and spreadsheets can exhaust memory, so limits protect the tab while keeping files private.
If your file is too large
For bigger PDFs or workbooks, use Adobe Acrobat, LibreOffice, Microsoft Office, or a desktop batch tool, then convert a trimmed copy here if you only need a quick private pass.
XLSX to JSON FAQ
Common questions about converting XLSX files to JSON.
Is this XLSX to JSON converter free?
Yes. Browser Convert does not charge for XLSX → JSON, add watermarks, or require an account.
What happens to formatting when I convert XLSX to JSON?
Expect a faithful but not always pixel-identical transfer. native fit for APIs, configs, and JavaScript apps matter most for JSON, while exotic XLSX features (overkill when you only need a simple data exchange format) may simplify. Always spot-check important pages.
Do I need Microsoft Office or Adobe apps installed?
No. Browser Convert handles XLSX → JSON in the browser without installing desktop software.
Is XLSX to JSON conversion private on Browser Convert?
Yes. Your Excel spreadsheet is processed in the browser. We do not upload the file to convert it, which is the main difference from typical online converters.
Are there file size limits for XLSX to JSON?
Yes. Browser Convert accepts about 50 MB per file, with up to 20 files queued at once. Documents are parsed and rendered entirely in your browser tab. Oversized PDFs and spreadsheets can exhaust memory, so limits protect the tab while keeping files private. If your file is larger, For bigger PDFs or workbooks, use Adobe Acrobat, LibreOffice, Microsoft Office, or a desktop batch tool, then convert a trimmed copy here if you only need a quick private pass.
Can I convert several XLSX files to JSON at once?
Yes. Queue up to 20 XLSX files and convert them in one pass. When finished, download the batch as a ZIP. Very large batches may need to be split so your browser stays responsive.