Development & Technical Utilities
Frequently asked questions
Should code be minified during development?
No, minification makes code unreadable for debugging. It is applied at the build stage, before deployment to production, and the working copy is kept in its original form.
How is a UUID different from an ordinary ID counter?
A UUID is generated independently on any machine and is almost guaranteed not to match another UUID, which makes it fit for distributed systems. A sequential counter needs a single source and reveals how many records are in the database.
Can MD5 be used to store passwords?
No, MD5 is considered unsafe for that task because of known collisions and how fast it can be brute-forced. For file checksums it is still fine.
Does the JSON validator only check syntax?
Yes, it checks the structure – whether brackets, quotes and commas are correct – not whether the data matches a specific schema or business logic.
Tools for everyday developer tasks: shrinking code before production, checking data structures, parsing request headers and generating service values like UUIDs and hashes.
Code minification
- JavaScript minifier – removing spaces, line breaks and comments from a JS file.
- CSS minifier – compressing a stylesheet without changing its behavior.
- HTML minifier – shrinking markup before it is served to the browser.
Minification reduces a file's weight but does not speed up its execution – the effect is on page load time first, not on how fast a script runs.
Checking and parsing data
- JSON validator – finding syntax errors and formatting the structure.
- User-Agent parser – breaking a browser string down into OS, engine and version.
- URL parameter parser – splitting an address into path, query parameters and anchor.
- Diff checker – a line-by-line difference between versions of a file or code.
Service value generators
- UUID and GUID generator – unique identifiers for database records.
- MD5 and hash generator – a checksum of a string or file.
- .htaccess redirect generator – redirect rules for Apache.
- Schema.org markup generator – structured data in JSON-LD format.
When these tools are needed in CI/CD
Minifiers and validators are handy not only run by hand before a release but also as part of a build pipeline: JSON checks and hash generation for file integrity checks are easy to automate. The manual online version comes in useful for a one-off check or debugging a specific fragment, when setting up a local environment for a single check makes no sense.
Converters for development
Some converters overlap with the "Converters and generators" section, but here is gathered specifically the part needed while working with code: Base64 for embedding small files into code, the binary system for low-level debugging, URL encoding for passing parameters correctly in a request.
Where to go next
Technical checks of the site itself – availability, SSL, speed – are covered in Technical SEO & Security. Working with domains and IPs is in Domains & Hosting.