Featured tool
● LocalPassword Generator
Create strong, unique passwords using the cryptographic random generator built into your browser.
Open password generator →◆ Built for a clear, focused job.— Private by design
Useful tools. Nothing extra.
Fast browser and command-line utilities for developers, system administrators, and anyone who values clear results and sensible privacy.
✓ No account✓ Local-first✓ Clear network boundaries
Toolbox
Find the right utility
Focused tools that solve one job well—without sign-ups or clutter.
PAUtility
Password Generator
Create strong, unique passwords using the cryptographic random generator built into your browser.
TOUtilityTOTP Generator
Generate RFC 6238 time-based codes locally from a Base32 secret.
WHUtilityWhat Is My IP?
Check the public address and request metadata visible to the application server.
MAUtilityMarkdown Editor
Write Markdown, preview it safely, download the source, or create a polished A4 PDF.
CIUtilityCIDR Calculator
Calculate a normalized IPv4 network, masks, address range, broadcast address, and usable hosts.
HAUtilityHash Generator
Calculate lowercase hexadecimal hashes for text or a local file using Web Crypto.
TIUtilityTimestamp Converter
Convert Unix seconds or milliseconds into ISO 8601, UTC, local time, and a relative description.
Private by design
Use focused technical utilities without creating an account. Sensitive calculations remain in your browser whenever the job does not require a server.
Every tool states its network boundary before you use it.
Practical guides
Understand what the tool is doing
Guide
How to Check Your Public IP with curl
Use an HTTPS endpoint to discover the address a public server sees.
Read guide →GuideIPv4 CIDR and Subnet Ranges
Read a slash prefix, find the subnet boundary, and count total and usable addresses.
Read guide →GuidePassword vs Passphrase
Choose between random characters and memorable words using length, entropy, and practical usability.
Read guide →