CSV to XLSX - Convert document online

(DOC, DOCX, RTF, TXT, ODT, XLS, XLSX, CSV, ODS, PPT, PPTX, ODP, HTML, XPS etc.)
Conversion Results:
# Output File Source File Action

Steps:

1. Click "Choose Files" button to select multiple files on your computer. You can also click the dropdown button to choose online file from URL, Google Drive or Dropbox. A target format can only be converted from certain document formats. For example: It can convert DOC to DOCX, but it can't convert DOC to XLSX.

2. Choose a target document format. The target document format can be PDF, DOC, DOCX, XLS, XLSX, PPT, PPTX, HTML, TXT, CSV, RTF, ODT, ODS, ODP, XPS or OXPS. When choosing a target format, it will list what source formats can be converted to the target format.

3. Click "Convert Now!" button to start batch conversion. The output files will be listed in the "Conversion Results" section. Click icon to show file QR code or save file to online storage services such as Google Drive or Dropbox.

CSV vs XLSX:
Name CSV XLSX
Full name Comma-Separated Values Office Open XML Document
File extension .csv .xlsx, .xlsm
MIME text/csv application/vnd.-openxmlformats-officedocument.-spreadsheetml.-sheet
Developed by Informational RFC Microsoft
Type of format Multi-platform, serial data streams Spreadsheet
Introduction In computing, a comma-separated values (CSV) file stores tabular data (numbers and text) in plain text. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. The use of the comma as a field separator is the source of the name for this file format. The Office Open XML file formats are a set of file formats that can be used to represent electronic office documents. There are formats for word processing documents, spreadsheets and presentations as well as specific formats for material such as mathematical formulae, graphics, bibliographies etc.
Technical details The CSV file format is not standardized. The basic idea of separating fields with a comma is clear, but that idea gets complicated when the field data may also contain commas or even embedded line-breaks. CSV implementations may not handle such field data, or they may use quotation marks to surround the field. Office Open XML documents are stored in Open Packaging Convention (OPC) packages, which are ZIP files containing XML and other data files, along with a specification of the relationships between them. Depending on the type of the document, the packages have different internal directory structures and names.
Associated programs Microsoft Excel, LibreOffice Calc Microsoft Office, LibreOffice, Kingsoft Office, Google Docs.
Sample file sample.csv sample.xlsx
Wikipedia CSV on Wikipedia XLSX on Wikipedia