An slk file extension is related to the Microsoft Symbolic Link, a data exchange file format (typically spreadsheets) used by various applications developed by Microsoft, but also supported by others.

There is one other file type using
the SLK file extension!

empty icon.slk - Timeslips lock data

Detailed description

Software that open slk file

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SLK file extension - Microsoft Symbolic Link format

What is slk file? How to open slk files?

File type specification:

Microsoft Office file type icon Microsoft Office file type

Spreadsheet and workbook file type icon Spreadsheet and workbook file type

slk file icon: slk filetype icon

The slk file extension is associated with Microsoft Office (mostly Microsoft Excel).

The SYLK stands for a Symbolic Link, which is a Microsoft proprietary file format typically used to exchange data between applications, specifically spreadsheets. SYLK files conventionally have an slk file extension.

From within a spreadsheet data can be exported in the SYLK format. Comprised of only ASCII characters, it is easily created and processed by other applications, such as databases.

Microsoft does not publish a full SYLK specification. Variants of the format are supported by Multiplan, Microsoft Excel, Microsoft Works,, and Gnumeric.

Updated: April 22, 2024

The default software associated to open slk file:

Microsoft Excel icon

Microsoft Corporation logoMicrosoft Excel  Microsoft Windows software

Company or developer:
Microsoft Corporation

A popular spreadsheet application distributed with Microsoft Office suite, Excel is offers calculating, contains graphing tools, pivot tables and own programming language based on Visual Basic.

Excel supports charts, graphs or histograms generated from specified groups of cells. Excel also can change data between other Microsoft Office applications. It is available for Microsoft Windows, Mac OS X (macOS) and various mobile platforms.

Microsoft Excel for Mac icon

Microsoft Corporation logoMicrosoft Excel for Mac  Apple macOS / Mac OS X software

Company or developer:
Microsoft Corporation

Microsoft Excel for Mac is popular spreadsheet application used to analyze, organize and manage data and lists. It is able to create visually rich datasheets and tables with icons, data bars and color scales. Microsoft Excel for Mac is fully compatible with Microsoft Excel for Windows.

Microsoft Office for Mac icon

Microsoft Corporation logoMicrosoft Office for Mac  Apple macOS / Mac OS X software

Company or developer:
Microsoft Corporation

Microsoft Office for Mac is popular office suite that contains a set of applications and services used to work with documents (Microsoft Word), spreadsheets (Microsoft Excel), presentations (Microsoft Powerpoint) and manage e-mail accounts, tasks, calendars and contacts (Microsoft Outlook).

Related articles:

File types supported in Microsoft Excel 2010

Help how to open:

Use Microsoft Office apps or other software office suites like

Occasionally, because the files are entirely in ANSI characters they can be opened with plain-text editors.

How to convert:

Open the file in suggested software and save in other file format supported by your application.

Find conversions from slk file:

slk to accdb

slk to csv

slk to silk

slk to xls

slk to xlsx

Find converter to slk file type:

excel to slk

ofx to slk

silk to slk

wks to slk

xls to slk

xlsb to slk

xlsx to slk

File identification strings:

HEX code: 49 44 3B 50
ASCII code: ID;P

List of software applications associated to the .slk file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open slk file, edit slk file, convert slk file, view slk file, play slk file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting slk files.

Software that open slk file - Microsoft Symbolic Link format

Programs supporting the exension slk on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open slk file action.

Microsoft Windows:

Main software associated with slk file by default:
Microsoft Excel small icon Microsoft Excel
Other suggested software:
PlanMaker Viewer small icon PlanMaker Viewer
PlanMaker small icon PlanMaker
Corel Quattro Pro small icon Corel Quattro Pro
Microsoft Works small icon Microsoft Works

Apple macOS / Mac OS X:

Main software associated with slk file by default:
Microsoft Excel for Mac small icon Microsoft Excel for Mac
Other suggested software:
NeoOffice small icon NeoOffice

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