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For security reasons and to ensure the best performance, a set of rules and limitations are put in place to control the files that can be stored on Lead Space.

Supported File Formats

Lead Space supports the following file types:

Extension Description

.doc, .docx


Microsoft Word document

Portable Document Format (Adobe Acrobat)




Electronic messages saved in a plain text file

Microsoft Outlook Mail Message file


.jpg, .jpeg


JPEG image

PNG image


.ppt, .pptx

Microsoft PowerPoint presentation


.xls, .xlsx

Microsoft Excel workbook

Files with an extension other than those listed above, with multiple file extensions, or no file extension at all are not supported.

Macro enabled files (such as .docm, .pptm, .xlsm, etc.) are not supported.

File size limitations

Maximim size limit for an individual file 25 MB (25,000 KB)
Minimum size limit for an individual file 1 KB

For best performance, it is recommended to keep the file size under 10MB (10,000 KB) whenever possible.

The file size of the document can be determined by locating it on the computer, using the right-click option with a mouse (Shift + F10 on Windows OS, or Ctrl + 5 on Mac OS), followed by selecting "Properties".

Please note that time-out issues may be experienced with files above the maximum allowed size, depending on the internet connection.

File name rules

The maximum length for a filename is defined as 255 characters.

File names can include most characters, including letters, numbers, spaces, punctuation marks, and/or symbols, except for the following:

< left angle bracket or less-than sign > right angle bracket or more-than sign
\ back slash / forward slash
: colon ; semicolon
, comma ? question mark
" double quote * asterisk
& ampersand | vertical bar or pipe