Calculators & Web Utilities
Scientific math, crypto hashes, URL tools, colors, units and UUIDs.
A combined desk of utilities: a scientific and standard calculator with live history, URL encoder and parameter parser, HEX/RGB/HSL color converter, SHA-256, MD5 and HMAC hashing, unit conversions and one-click UUID v4 generation.
- SHA-256
- MD5
- HMAC
- UUID v4
- URL
- HEX/RGB/HSL
How to use it
- Open the Calculators & Web Utilities workspace.
- Switch to the calculator, hash lab, color or unit tab you need.
- Compute and copy results with one click.
Frequently asked questions
Can I generate SHA-256 hashes online here?
Yes — plus MD5 and HMAC variants. Hashing uses the Web Crypto API locally, so secret inputs never leave your device.
Does the calculator keep a history?
Yes. Every calculation is logged in a live history panel you can revisit and reuse.
How do I generate a UUID v4?
Open the UUID tab and click generate — each ID is cryptographically random and ready to copy.