Printable Random Code Planner
This sheet is for anyone planning random codes, test data, or access strings. It has columns for code format, alphabet size, length, bits, possible values, guess hit chance, and codes issued. Enter the alphabet size, length, and number of codes issued, and the sheet calculates entropy, possible values, and the chance that a random guess matches a valid code. Sample rows include formats like SPRING-AAAA99 and Hex 16.
Free printable · PDF
- 1 page
- US Letter, landscape — choose “Fit to page” for A4
- PDF, 60 KB
Free for personal, family and classroom use.
Use it to compare code patterns before you generate them. Fill in the format you want, then review the calculated values to see how hard the code is to guess and how many unique values it can support. The sheet works as a quick planning page for random string systems, validation rules, and test data sets.
Good for
- Plan secure random code formats
- Estimate valid code space size
- Review guess hit chance
Tip: Print in landscape so the full row of code data stays easy to scan.
4 files · XLSX, PDF, DOCX
Get every sheet: Random Code and Test Data Pack
This sheet plus 3 more in one download, with the editable Excel and Word files. Coupon code planning workbook with entropy and guess-risk formulas, a printable code card template, a test data planning sheet and a security checklist for codes and tokens.
$5.00 USD, one-time 4 files · about $1.25 each
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