Encoding auto-detection
UTF-8, UTF-16 LE/BE with byte-order marks, Windows-1252, ISO Latin 1, and Mac OS Roman are recognized on open — no more é and ’ artifacts in your spreadsheet.
All use cases
Convert CSV to Excel without the guesswork.
Double-clicking a CSV into Excel breaks on semicolon delimiters, foreign encodings, and odd quoting. CSV Power Editor detects the encoding and delimiter automatically, shows the file in a real grid, and saves a clean XLSX workbook — all locally on your Mac.
How to
CSV to XLSX in four steps.
- 1
Open the CSV file
CSV Power Editor auto-detects the encoding (UTF-8, UTF-16 with BOM, Windows-1252, ISO Latin 1, Mac OS Roman) and the delimiter (comma, semicolon, tab, or pipe), so the grid loads correctly the first time.
- 2
Check the grid
Headers, row counts, and values appear in a spreadsheet view. If the source system exported junk — blank rows, stray spaces, broken dates — fix it here with preview-first Power Tools.
- 3
Add more CSVs as tabs (optional)
Import additional CSV files as new sheet tabs to build a single multi-sheet workbook from several exports.
- 4
Save As XLSX
Choose File → Save As and select Excel workbook (.xlsx). Every tab becomes a worksheet in the output file.
Why it works
Built for CSVs that don't behave.
Delimiter sniffing
European exports that use semicolons, log-style tab-separated files, and pipe-delimited dumps load as proper columns automatically instead of one long string per row.
Several CSVs, one workbook
Import multiple CSV exports as tabs and save one organized XLSX — handy for weekly reports or per-region exports that belong together.
What you see is what's written
The XLSX is written from the grid you reviewed. Clean the data first with trim, dedupe, date conversion, or split tools, then export with confidence.
FAQ
Common questions.
My CSV uses semicolons instead of commas. Will it open correctly?
Yes. The delimiter is detected automatically — comma, semicolon, tab, and pipe are all recognized — so semicolon-separated European exports load as proper columns.
Can I combine several CSV files into one Excel workbook?
Yes. Open the first CSV, then import the others as new sheet tabs and save the whole thing as a single .xlsx workbook.
What about large CSV files?
Sheets above 50,000 rows are spilled to a disk-backed store, and the app is tested with 75,000-row files. Filtering and search stay responsive.
Do I need Microsoft Excel installed?
No. CSV Power Editor writes XLSX natively. The output opens in Excel, Numbers, and Google Sheets.
Is it free?
The app is free to download with a 14-day full Pro trial. After the trial, free mode keeps files up to 300 rows fully editable, and a one-time $14.99 Lifetime Pro purchase unlocks larger files.
Keep going
Related guides.
Convert Excel to CSV on Mac
Turn XLSX sheets into clean UTF-8 CSV files without broken characters, mangled delimiters, or Excel.
Remove Duplicates from CSV Files
Find exact and fuzzy duplicate rows by key columns, preview what gets removed, then apply with undo.
Merge CSV Files into One
Combine multiple CSV or Excel exports into one workbook, dedupe the result, and export.