OfficeWorkKitConvert CSV ↔ Excel
Turn CSV into Excel, or export a selected Excel sheet as CSV. Choose the text encoding and delimiter.
01 Choose files
Your file is ready.
Preview shows up to 8 rows. Review the result before use. Refreshing clears files and results.
Before you start
What are the file limits?
Up to 20 files, 20MB each and 50MB total. Spreadsheets: 50,000 rows, 200 columns, 1 million cells. PDFs: 300 pages total. Images: 16 megapixels each. Your device may require smaller files.
Where are my files stored?
File contents are processed in browser memory, without uploads or persistent app storage. Closing or refreshing the tab clears the work; downloaded files remain on your device.
Will spreadsheet data change?
Original files are unchanged. Dates and numbers are exported as displayed text; formulas are not recalculated. Empty rows are omitted. CSV values starting with formula characters such as =, +, -, or @ may receive a leading apostrophe to prevent formula execution. The checker never fixes values or deletes duplicate rows automatically.
Worked example
The values below are fictional examples that illustrate the workflow.
Input and settings
CSV text: ID,Name 001,김하늘 For a file saved as CP949, choose CP949 as the input encoding
Expected result
XLSX output: ID 001 is saved as text Name: 김하늘 CSV output includes a UTF-8 BOM