XLSX to CSV
Drop in a .xlsx or .xls workbook and download a CSV. By default the first worksheet is exported; specify a sheet name in the options to pick a different one. Formulas are evaluated to their cached values; dates are rendered as ISO-like strings. Output uses standard RFC 4180 quoting. Conversion runs entirely in your browser — your workbook never leaves your device.
Drop .xlsx / .xls 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
.xlsx, .xls → .csv
Related tools
Tools that work with the same formats — most users open one of these next.
CSV to XLSX
Convert a CSV file into an Excel .xlsx workbook — free online, no upload.
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.
YAML to CSV
Convert a YAML list into a CSV spreadsheet — free online, no upload.
TSV to CSV
Convert a tab-separated file to standard CSV — free online, no upload.
CSV to JSON
Convert CSV files to pretty-printed JSON — free online, no upload.
Frequently asked
Is XLSX to CSV free to use?
Yes. XLSX to CSV 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 — XLSX to CSV 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 XLSX to CSV work?
Open XLSX to CSV, drop in your XLSX, XLS file, choose any options, and click Convert. Your browser does the work locally and produces a CSV file you can save right away.
What's the maximum file size for XLSX to CSV?
Because XLSX to CSV 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.