Back to Developers
Parameters
Results
- Entropy
- 104.9 bits
- Combinations
- 3.72e+31
- Rating
- Very strong
How it works
Estimate password strength in bits of entropy from length and character set size.
Who it's for: Developers and security-conscious users evaluating password policies.
Entropy = length × log₂(charset size) in bits.
Charset options from lowercase only through full ASCII symbols.
Rates strength as Weak, Moderate, Strong, or Very strong.
How to use
- Enter Length and Character set size.
- Read Entropy (bits), Combinations, and Rating.
Good to know
- Use a password manager to generate and store high-entropy passwords.
Related tools
More calculators in the same category
- JSON FormatterFormat, minify, and validate JSON in your browser
- JWT DecoderDecode JWT tokens locally — nothing is sent to a server
- Base64 Encode/DecodeEncode and decode text with Base64
- Cron Expression BuilderBuild and explain cron schedules
- UUID GeneratorGenerate cryptographically random UUID v4 values
- Timestamp ConverterConvert Unix timestamps to dates and back