How to use it
- Choose Generate or Assess locally.
- For generation, choose length and character groups; for assessment, enter a password only when ready.
- Review the estimate and handle the generated value using your own secure password manager.
Everyday Utilities · Local-first · Beta
Password Toolkit
Generate a password with Web Crypto or assess one locally with clearly labelled strength estimates.
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Trust record
Check the method before you rely on the result
- Method
- Use Web Crypto random values for generation and a conservative character-set entropy estimate for local assessment.
- Estimated entropy ≈ password length × log₂(character pool size)
- Effective period
- Formula-based; no statutory effective period
- Last verified
- 10 August 2026
- Review every 365 days
- Reviewer status
- Product and domain review: specialist approval not required
- Privacy
- Password values remain in browser memory only. They are never sent to analytics, a backend, a URL or a log, never persisted, and never auto-copied.
Important limitations
- Strength is an estimate, not a guaranteed crack time or security certification.
- Generated passwords are not copied, saved, logged or sent anywhere automatically.
Browse Everyday Utilities · Methodology · Sources
A quick guide
Use the number with context
The answer is only useful when you know what it includes and what it leaves out.
Formula
Estimated entropy ≈ password length × log₂(character pool size)
A strength label is a rough signal. Unique passwords and a password manager matter more than a label alone.
Make it concrete
Worked example
A 16-character password using lowercase, uppercase, numbers and symbols has a higher estimated search space than a short lowercase-only password.
Boundaries
What this tool does not assume
Limitations
- Strength is an estimate, not a guaranteed crack time or security certification.
- Generated passwords are not copied, saved, logged or sent anywhere automatically.
Edge cases
- At least one character group is required for generation.
- If Web Crypto is unavailable, the tool reports an honest error instead of falling back to Math.random.
- The assessment input is never placed in analytics or the URL.
Last reviewed 10 August 2026 · Formula version 1.0
Method & sources
How this result is grounded
The formula is deterministic and runs in your browser. Read the reference below for the method used by this tool.
- Everyday Utilities methodology v1
KarobarKit controlled methodology · authoritative reference · Checked 10 August 2026
Supports: everyday utility formulas · rounding and scope limitations · privacy boundary
Questions
Frequently asked
Does the generator use secure randomness?
It requires the browser Web Crypto API and does not fall back to an insecure random source.
Keep going
Related tools
A related local-first tool for the next step.
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Source register checked 10 August 2026.