Convert Excel to JSON online
Convert Excel Workbook (Office Open XML Spreadsheet) files to JavaScript Object Notation instantly in your browser — free, private, and with no account. Files never leave your device: the Excel Workbook (Office Open XML Spreadsheet) → JavaScript Object Notation pipeline runs entirely on your machine.
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25 private, browser-based workflows
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Browse files · Excel to JSON · Up to 25 MB each (max 20 files)
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Built for reliable exports
Why convert Excel Workbook (Office Open XML Spreadsheet) to JavaScript Object Notation?
XLSX-to-JSON converts worksheet rows into structured objects keyed by column headers — the standard bridge from spreadsheets into web applications, databases, and pipelines. Formulas and calculated fields, multiple sheets per file, rich number formatting and conditional styles, and native handling by Excel and Google Sheets. Structured and hierarchical, language-independent, natively consumed by every programming language and API, and self-describing through field names.
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About Excel Workbook (Office Open XML Spreadsheet) and JavaScript Object Notation
Excel Workbook (Office Open XML Spreadsheet) (Excel Workbook (Office Open XML Spreadsheet)) — XLSX is the Microsoft Excel workbook format since Office 2007. A single file can hold multiple sheets, formulas, charts, pivot tables, and formatting.
JavaScript Object Notation (JavaScript Object Notation) — JSON is the de facto data-interchange format of the web: nested key-value pairs, arrays, and primitives in a format both humans and machines parse effortlessly.
Guide
When this conversion makes sense
Reach for this conversion when your content currently lives as Excel Workbook (Office Open XML Spreadsheet) — budgets, financial models, reports with multiple tabs, data analysis with formulas, and stakeholder-facing spreadsheets. — and the destination needs JavaScript Object Notation: API responses, configuration files, application state, NoSQL documents, and structured data exchange between services.
Keep the source in mind: No plain-text diffing, heavier than CSV for pure data, and advanced features (macros, pivot caches) can behave differently across spreadsheet apps. Meanwhile, JavaScript Object Notation solves that with this strength: Structured and hierarchical, language-independent, natively consumed by every programming language and API, and self-describing through field names.
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What to expect from the output
This converter runs fully client-side — no upload, no server storage, no watermark. Drop files in, preview the result, and download individually or as a batch ZIP.
Because Excel Workbook (Office Open XML Spreadsheet) and JavaScript Object Notation were designed for different jobs, expect structure to map cleanly but presentation details to adapt: No plain-text diffing, heavier than CSV for pure data, and advanced features (macros, pivot caches) can behave differently across spreadsheet apps.
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Frequently asked questions
Is this Excel Workbook (Office Open XML Spreadsheet) to JavaScript Object Notation converter free?+
Yes. All document conversions are completely free with no sign-up, no watermarks, and unlimited usage.
Are my files uploaded to a server?+
No. All conversion happens in your browser using local JavaScript libraries. Your files are never uploaded, never stored, and never visible to anyone but you.
What quality can I expect from Excel Workbook (Office Open XML Spreadsheet) to JavaScript Object Notation?+
JavaScript Object Notation cannot store the full presentation of Excel Workbook (Office Open XML Spreadsheet) (styling, fonts, or layout are dropped by design), but the content and structure carry over intact.
Can I convert Excel Workbook (Office Open XML Spreadsheet) files in batches?+
Yes. Drop multiple Excel Workbook (Office Open XML Spreadsheet) files at once and they convert in sequence; download results individually or grab the whole batch as a single ZIP file.