Convert CSV to Excel online
Upload a CSV file and download it as Excel. Translation keys, plurals and placeholders are preserved. Free, no account needed.
Pick the source format or let the converter detect it from the file.
Choose the format you want to download.
An .xlsx workbook with translation keys in the first column and one column per language. Excel is the format most non-technical translators and reviewers are comfortable with.
Need it the other way round? Convert Excel to CSV.
From: CSV
A comma-separated spreadsheet with one row per translation key and one column per language. CSV is the easiest way to hand translations to people who work in Excel or Google Sheets.
Used by: Excel, Google Sheets, translation agencies. All languages in one file. Read the CSV format guide.
"key","english","polish"
"welcome","Welcome!","Witajcie"
"about-us","About Us","O nas"
"register","Register","Rejestracja"To: Excel
An .xlsx workbook with translation keys in the first column and one column per language. Excel is the format most non-technical translators and reviewers are comfortable with.
Used by: Microsoft Excel, Google Sheets, LibreOffice. All languages in one file. Read the Excel format guide.
How to convert CSV to Excel
- Drop your .csv file into the converter above, or paste its content.
- Click Convert. You get a single .xlsx file with all languages.
- Preview the result, copy it or download the file.
What changes between CSV and Excel
- Keys, texts, plural forms and placeholders are mapped one to one. Comments and descriptions are kept when both formats support them.
Convert and translate in one place
If you need the Excel file in more languages, the fastest route is a free SimpleLocalize project: import the CSV file, add languages, run auto-translation with DeepL, Google Translate, OpenAI, Claude or Gemini, and download the result as Excel. The CLI does the same from CI with upload and download commands, so the conversion becomes part of your build. See also translating CSV files.
Frequently asked questions
Is the converter free?
Yes. There is no signup and no limit on the number of conversions beyond a few requests per second.
Are my files stored?
No. The file is parsed in memory, converted and returned in the same request. Nothing is written to disk or a database.
What about plurals and placeholders?
Plural forms are normalized to ICU message syntax and written back in the native form of Excel. Placeholders are kept, and Apple and Android specific syntax is translated between platforms. Read more in the pluralization guide.
Convert CSV to other formats
Translate your Excel files
- Import CSV or Excel files into a free project
- Auto-translate with DeepL, Google, OpenAI, Claude or Gemini
- Download in any of the supported formats or publish to the CDN