Convert Excel to CSV online
Convert Excel Workbook (Office Open XML Spreadsheet) files to Comma-Separated Values instantly in your browser — free, private, and with no account. Files never leave your device: the Excel Workbook (Office Open XML Spreadsheet) → Comma-Separated Values pipeline runs entirely on your machine.
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25 private, browser-based workflows
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Browse files · Excel to CSV · Up to 25 MB each (max 20 files)
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Local processing · No account · No watermark
Built for reliable exports
Why convert Excel Workbook (Office Open XML Spreadsheet) to Comma-Separated Values?
XLSX-to-CSV exports the active sheet into plain comma-separated rows, stripping formulas and formatting. The universal hand-off format when a target system needs raw data, not a workbook. Formulas and calculated fields, multiple sheets per file, rich number formatting and conditional styles, and native handling by Excel and Google Sheets. Dead-simple structure, negligible file size, importable by Excel, Google Sheets, pandas, and virtually every data tool in existence.
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Guide
About Excel Workbook (Office Open XML Spreadsheet) and Comma-Separated Values
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.
Comma-Separated Values (Comma-Separated Values) — CSV is the lowest common denominator of tabular data: one row per line, values separated by commas. Spreadsheet apps, databases, and scripts all speak it.
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 Comma-Separated Values: data export/import, contact lists, analytics datasets, database snapshots, and moving tables between systems that share nothing else.
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, Comma-Separated Values solves that with this strength: Dead-simple structure, negligible file size, importable by Excel, Google Sheets, pandas, and virtually every data tool in existence.
Guide
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 Comma-Separated Values 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 Comma-Separated Values 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 Comma-Separated Values?+
Comma-Separated Values 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.