The Problem of "Loose" Tools
As a developer, you spend your day manipulating data. You need to convert a UNIX timestamp, then decode a URL, then generate a UUID v4 for a database. Normally, you search for each thing on Google and end up on websites full of pop-ups, annoying captchas, and worst of all, insecure.
Pasting a production JSON or an RSA private key into an unknown website is a serious security negligence. You never know if that site is saving a log of everything you type.
The IT-Tools Philosophy
ZenUtils groups all these small utilities into a single audited "Single Page Application" (SPA). Like our other tools, the premise is Privacy by Design. All processing is local.
Featured Tools
1. Tokenization and Security (JWT)
JSON Web Tokens (JWT) are the standard for modern authentication. But they are unreadable to the naked eye (`eyJhbGciOi...`). Our tool allows you to decode the Header and Payload to see:
- Expiration date (`exp` claim).
- User roles (`scope` or `roles`).
- Signing algorithm (HS256 vs RS256).
All this without having to send your Bearer token to an external server.
2. UUID and ULID Management
When designing distributed databases, the incremental ID (`1, 2, 3...`) is a security and scalability problem.
- UUID v4: Totally random. f47ac10b-58cc-4372-a567-0e02b2c3d479.
- ULID: Universally Unique Lexicographically Sortable Identifier. Compatible with UUID but time-sortable, which greatly improves indexing performance in databases like PostgreSQL or DynamoDB.
3. Hashing vs Encryption
Many juniors confuse these terms. IT-Tools allows you to experience the difference:
- Hashing (Hash Generator): It is one-way. From "Hello" you get an MD5 or SHA-256. You cannot go back. Useful for verifying file integrity or storing passwords (with Salt).
- Encryption: It is two-way. You need a key to encrypt and the same (or its pair) to decrypt.
Cron Jobs Explained
CRON syntax (`* * 5 * *`) is notoriously difficult to remember. Is the third asterisk the day of the month or the day of the week? Our "Crontab Generator" utility translates that cryptic syntax into human language: "Run at 05:00 on every day-of-week". And vice versa. Vital for configuring scheduled tasks on Linux servers.
Data Conversion and Encoding
Sometimes you receive binary data in a log that you need to inspect.
- Base64: Converts binary to transport-safe ASCII text.
- URL Encode: Converts special characters (`?`, `&`, `/`) into their `%20` equivalents so they don't break URLs.
- HTML Entities: Escapes characters like `<` and `>` to prevent XSS attacks.
Productivity for the Senior Developer
Having IT-Tools saved in your bookmarks bar saves you, on average, 15 minutes a day in trivial searches. More importantly, it protects you from accidental data leaks. It is an Open Source tool that respects your intelligence and your time. No 10-minute tutorials, no "Sign Up to see result". Just input and output.