NUM Converter

Extract text from NUM files

Select File
Drop or upload your .NUM file

Online File Converter

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How to extract text from your NUM file

Click the "Select File" button above, and choose your NUM file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.

Convert NUM to another file type

To convert your NUM file to another format, you need See5 or other Data software.

Convert a file to NUM

To convert other file formats to the "Numeric Attribute File" file type, you need software like See5 or a similar tool.

About NUM files

The .num extension represents a split in file identity, creating significant confusion for users.

1. Samsung Mobile Image (Most Common Consumer Case):
For many users, a .num file is actually a standard JPEG image that has been renamed or obfuscated by older Samsung mobile software (specifically the Samsung Kies backup tool or internal cache systems). These files typically reside in hidden folders or backup archives. They are fully functional images locked behind the wrong extension. A major limitation is that image viewers (like Windows Photos or Preview) will not recognize them, leading users to believe their photos are corrupted.

2. Numeric Dataset / C5.0 Attribute File:
In technical fields, .num serves as a specialized text-based format for data mining and machine learning, specifically associated with the C5.0 and See5 algorithms developed by RuleQuest Research. In this context, the file defines numeric attribute names or stores raw numeric arrays for decision tree generation. Unlike the image variant, these are legitimate text files but lack compatibility with standard spreadsheet software like Microsoft Excel without manual importing.

Practical Conversion Advice:

For Samsung Files: The quickest fix is often renaming the extension from .num to jpg. If you have hundreds of files, a batch converter is safer to avoid data corruption.
For Data Files: These should be opened with a code editor like VS Code or imported into Excel as a generic "Text" file. Converting them to CSV or PDF is recommended for long-term archiving and sharing.

Convert.Guru analyzes your NUM file, detects the exact format, and lets you read the text inside.

Users also converted NUMBERS, ANON, VERSION and IST files.

FAQ

If you want to convert NUM file to XLS, XLSX, XLSM, XLSB, ODS, CSV, TSV, TAB, DIF, SLK, WK1 or WK3, you can use See5 or similar software from the "Numeric Dataset / Renamed Image" category. In the File menu, look for Save As… or Export….

To convert WQ1, XLSM, NOTES, QPW, WK3, WB2, WKS, XLSB, 123, XLS, WB1 or XLSX files to NUM, try See5 or another comparable tool in the "Numeric Dataset / Renamed Image" category.

The NUM Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our NUM converter.