Free Utility Tools Online
Free browser-based utility tools for everyday tasks. Convert between 80+ units of measurement, generate cryptographically secure passwords, create random names and usernames, generate UUID v4 identifiers in bulk, and convert Unix timestamps to human-readable dates — all running locally in your browser with no server round trips.
Everyday Tools for Developers and Professionals
Some tasks come up constantly in development and professional work — generating a secure password, creating test UUIDs, converting a Unix timestamp from a log file, or checking how many kilograms a weight converts to. These utility tools handle all these common tasks instantly without requiring any external services or manual calculations.
All Free Utility Tools Online
5 tools · Free · Browser-based · No sign-up
Convert 80+ units across 12 categories — length, weight, temperature, speed, data, energy and more. Instant.
Generate cryptographically secure random passwords. Customize length up to 128 chars, mix character types.
Generate random names — male, female, gender-neutral, usernames, fantasy names. Bulk generation.
Generate UUID v4 identifiers instantly — one or hundreds at once. Cryptographically secure, one-click copy.
Convert Unix timestamps to dates and vice versa. Live Unix clock, timezone support, milliseconds.
Common Workflows
Step-by-step guides for the most common use cases
- Open Password Generator
- Set length (16+ recommended)
- Enable uppercase, lowercase, numbers, symbols
- Optionally exclude ambiguous characters
- Generate and copy your password
- Open Timestamp Converter
- Paste a Unix timestamp from your logs
- See the human-readable date and time
- Convert the other direction if needed
- Use the live Unix clock for current time
Frequently Asked Questions
Everything you need to know about these tools
The unit converter supports 80+ units across 12 categories: Length (mm, cm, m, km, inches, feet, yards, miles, nautical miles), Weight (mg, g, kg, tonnes, ounces, pounds, stones), Temperature (Celsius, Fahrenheit, Kelvin), Area, Volume, Speed, Time, Data/Storage, Energy, Pressure, Power, and Frequency. All conversions are instantaneous with no server required.
The password generator uses the Web Crypto API (window.crypto.getRandomValues), which is cryptographically secure and suitable for generating passwords. It is significantly stronger than Math.random() which is not cryptographically secure. Generated passwords are never sent to any server, never logged, and are only visible on your screen.
UUID (Universally Unique Identifier) v4 is a 128-bit randomly generated identifier in the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Use UUIDs as primary keys in databases, unique IDs in distributed systems, session tokens, file names for uploads, and any situation requiring a unique identifier that will never collide. Our generator creates cryptographically random v4 UUIDs, one or hundreds at a time.
A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). It is used in databases, log files, APIs, and programming because it is timezone-independent and easy to do arithmetic with. Our timestamp converter shows the current Unix time live and converts between Unix timestamps and human-readable dates in any timezone.
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