Free Online XLSX to OTB Converter
XLSX
to
OTB
XLSX
Office Open XML Worksheet Sheet
XLSX is a file format created with Microsoft Excel, version from 2007 and younger. This file is a spreadsheet. All data distributed document and stored in the cells. Each cell has a unique address, which is denoted by the letters and Arabic numerals. XLSX file format is based on the Open XML. To reduce the size of the file is compressed ZIP.
OTB
On-the-air bitmap
This format was created by Nokia for use in its proprietary phones. A bitmap image was used to transfer image files between devices over a wireless connection. It was mainly used when exchanging multimedia text messages that support inserting pictures.
How To Convert XLSX to OTB

Step 1: Upload Files
Click the upload button or drag and drop your XLSX files into the upload area.

Step 2: Convert File
Click "Convert" and wait for conversion done

Step 3: Download
Download the converted OTB file