SysAdmin Quick Tools

Runs locally in your browser. Nothing is uploaded.

UTC —

Epoch —

ms —

Patch Tuesday: —

A single-page toolbox for quick ops work — paste, convert, copy, move on.

YAML converter and formatter, IPv4 subnet calculator, and an offline password strength checker with entropy estimation — all local, nothing uploaded.

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JSON ⇄ YAML Converter

Auto-detect input. Pretty JSON + YAML output. Highlights parse errors.

▾

Paste JSON or YAML here

Formatted JSON

Readonly

YAML Output

Readonly

YAML Formatter / Fixer

Checks YAML syntax + basic spacing issues. Outputs normalized YAML.

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Paste YAML here Validation mode:

Ready.

Formatted YAML

Readonly

Notes: comments/order may change when YAML is re-serialized. Anchors/aliases are expanded (noRefs).

Subnet Calculator (IPv4)

Enter IP and CIDR or netmask. Outputs network, broadcast, usable range, wildcard, and host counts.

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IP address

CIDR or netmask

Ready.

Tip: you can paste 10.0.0.5/16 into either box and hit Calculate.

Network: —

Broadcast: —

First usable: —

Last usable: —

Prefix: —

Netmask: —

Wildcard: —

Total addresses: —

Usable hosts: —

Password Strength Checker (offline)

Estimates entropy and crack time. No upload, no storage.

▾

Password

Score: ——

Estimate (bits): —

Character set: —

Length: —

Estimated crack time

Illustrative only. Depends on hashing and rate limits.

10k guesses/sec: —

1B guesses/sec: —

100B guesses/sec: —

Suggestions

Use 14+ characters.
Mix upper/lowercase, numbers, symbols.
Avoid reused or known-breached passwords.

Ready.