DEV Community: Bilal Shahid

How to Calculate Exact Age in Years, Months, and Days

Bilal Shahid — Wed, 19 Aug 2026 05:00:39 +0000

Most people calculate age by subtracting birth year from the current year.

That works for a rough number. It fails when you need exact age for forms, benefits, sports categories, or legal cutoffs — because months and days matter.

Why “just subtract the year” is wrong

Example:
• Date of birth: 15 March 1998
• Today: 20 May 2024

Year-only math says 26.
Exact age is 26 years, 2 months, and 5 days.

If a form asks for age as of a specific date, the difference becomes even more important.

The right approach (Y-M-D)

Take the end date (today, or a fixed “as of” date)
Subtract the birth date
Borrow months/days when needed (like manual date subtraction)
Account for month lengths and leap years

Doing this by hand is error-prone. A small calculator removes the mistakes.

When exact age is required

• School / exam eligibility
• Sports age groups
• Visa or application forms
• HR and onboarding paperwork
• “Age as of 1 January” style rules

In all of these, being one day off can change the answer.

A simple free option

If you want a quick exact breakdown without spreadsheets:

https://360toolhub.com/tools/age-calculator.html

Enter date of birth (and an optional target date). You get years, months, and days in one step — no signup.

Quick tip

Always confirm the “as of” date the organization is using.
“Age today” and “age on 31 December” are not the same question.

Summary

• Year subtraction ≈ approximate age
• Years + months + days = exact age
• Use a reliable date calculation when paperwork depends on it

Exact age is a small detail until it rejects an application. Better to calculate it correctly once.

How to Merge Multiple PDFs Into One File (Free & Fast)

Bilal Shahid — Wed, 12 Aug 2026 04:26:43 +0000

If you’ve ever emailed a client three separate PDFs—a proposal, a pricing sheet, and a contract—you already know the problem.

They open the wrong file first. Something gets lost in the thread. Or they ask you to “send everything again as one document.”

Merging PDFs is a small task that saves a surprising amount of back-and-forth.

When merging PDFs actually helps

• Proposals + appendix + terms in one package
• Monthly reports combined into a single file
• Signed pages joined with the original document
• Coursework or applications that must be one upload

One clear file is easier to download, print, and archive.

What you need before you merge

All PDFs in the final content order (cover first, appendix last)
A quick check that each file opens correctly
A sensible output name (ClientName_Proposal_2026.pdf)

If the combined file becomes huge, compress it after merging so email limits don’t block the send.

How to merge PDFs online (simple flow)

You don’t need desktop software for a basic merge:

Open a browser-based PDF merger
Add every PDF you want to include
Drag them into the correct order
Merge and download the single PDF
Open the result once before you share it

I use a free tool for this when I don’t want to install anything:

https://360toolhub.com/tools/pdf-merge.html

It runs in the browser, lets you arrange order, and downloads one combined file—no account required.

Common mistakes to avoid

• Merging before the content is final (you’ll redo the whole pack)
• Forgetting page order (landscape pages mixed into a portrait report)
• Sending a 40MB monster when a compressed version would do
• Not testing the final PDF on mobile (clients often open files on phones)

Merge first, compress second

If your combined PDF is still too large for email or a portal upload:

Merge everything into one file
Run that file through a PDF compressor
Spot-check quality (charts and scans matter most)

That two-step flow solves most “attachment too large” problems.

Quick checklist before you hit send

□ Correct page order

□ File opens and looks complete

□ Size is under the recipient’s limit

□ Filename is clear

□ You’ve kept the original separate files as backup

Final thought

Merging PDFs isn’t glamorous work—but clean packaging makes you look organized. One document, clear name, reasonable size. That’s usually all a client needs.

If you want a free no-signup option for the merge step:

https://360toolhub.com/tools/pdf-merge.html

Building a Meta Tag Generator: Why Every Web Project Needs One

Bilal Shahid — Mon, 03 Aug 2026 05:31:37 +0000

Building a Meta Tag Generator: Why Every Web Project Needs One

If you've built even a small website, you've probably added a

tag. But what about the rest of your metadata? Many developers leave SEO until the end of a project, even though creating good metadata only takes a few minutes. Why Metadata Matters Search engines use metadata to better understand your pages. Users also see your title and meta description before visiting your website. That means your metadata is often your first impression. Essential Meta Tags Every webpage should include: Title Meta Description Viewport Charset Canonical URL Open Graph tags (for social sharing) Twitter Card tags Automating the Process Instead of manually writing HTML every time, a Meta Tag Generator can help by: Generating valid HTML Reducing mistakes Saving development time Keeping metadata consistent Best Practices Write unique titles. Avoid duplicate descriptions. Keep titles concise. Focus on users first, then search engines. Final Thoughts A Meta Tag Generator isn't a replacement for a good SEO strategy, but it removes repetitive work and helps ensure every page has the essential metadata it needs. I've been building browser-based productivity tools recently, and adding a Meta Tag Generator has been one of the most useful additions for developers, bloggers, and website owners who want a faster workflow.

Stop Installing Software for Every Small Task

Bilal Shahid — Sat, 01 Aug 2026 05:20:06 +0000

As developers, we're quick to install new software.

But do we really need a dedicated application just to resize an image, format JSON, generate a password, or merge a PDF?

Modern browser-based tools can handle many of these tasks instantly.

Continue by discussing:

Faster workflow
Cross-platform compatibility
No installation
Easier collaboration
Examples like JSON formatting, image optimization, QR code generation, and link shortening

End with a natural mention of 360ToolHub as a browser-based collection of utilities.

Why Every Developer Should Keep a Link Shortener in Their Toolkit

Bilal Shahid — Fri, 31 Jul 2026 05:44:09 +0000

Why Every Developer Should Keep a Link Shortener in Their Toolkit

As developers, we rely on dozens of online tools every day.

From formatting JSON and compressing images to generating invoices or creating QR codes, small utilities save us a surprising amount of time.

One tool that's often overlooked is the Link Shortener.

At first glance, it seems simple—it just makes long URLs shorter. But in reality, it has many practical uses in development, documentation, testing, and collaboration.

Let's explore why.

1. Cleaner Documentation

If you've ever written a README, tutorial, or technical documentation, you've probably dealt with long URLs.

Instead of this:
https://example.com/documentation/api/v2/resources/users/create-account?ref=documentation&utm\_source=website

A shorter link is much easier to read and share.

Clean documentation improves the overall developer experience.

2. Better for Sharing Projects

Whether you're sharing:

GitHub repositories
Portfolio projects
Demo applications
Blog posts
API documentation

A short URL looks more professional and is easier to remember.

3. Great for QR Codes

Many developers create QR codes for:

Local demos
Event registrations
Product documentation
Wi-Fi access
Business cards

Shorter URLs usually produce simpler QR codes, making them easier to scan and print.

4. Easier Testing

When testing forms, emails, mobile apps, or printed materials, short links are easier to copy and less prone to typing mistakes.

5. Useful for Presentations

If you're giving a presentation or workshop, displaying a long URL on a slide isn't ideal.

A short, clean link allows attendees to access resources quickly without manually typing complicated addresses.

6. Helpful for Freelancers

Freelancers often send links to:

Invoices
Portfolios
Contracts
Proposals
Design files

Using shorter links makes communication cleaner and more professional.

Choosing the Right Link Shortener

A good link shortener should be:

Fast
Easy to use
Free
Browser-based
Mobile friendly
Privacy conscious

Most importantly, it shouldn't require unnecessary registration just to shorten a URL.

Final Thoughts

A link shortener isn't just about reducing the number of characters in a URL.

It's a simple productivity tool that makes documentation cleaner, sharing easier, QR codes more efficient, and daily workflows more organized.

Small improvements like these save time every day.

About 360ToolHub

I recently built 360ToolHub, a free collection of browser-based productivity tools designed for developers, freelancers, students, and businesses.

The platform currently includes tools such as:

Link Shortener
Password Generator
JSON Formatter
Invoice Generator
Resume Builder
Merge PDF
Compress PDF
Image Compressor
Image Resizer
QR Code Generator
Signature Generator
Unit Converter
Word Counter
Business Calculators

Everything works directly in the browser with no registration required.

🌐 https://360toolhub.com

I'm continuously adding new tools based on real-world use cases, so feedback and suggestions are always welcome.

12 Free Online Tools I Use Almost Every Day as a Developer & Freelancer

Bilal Shahid — Thu, 23 Jul 2026 05:51:40 +0000

12 Free Online Tools I Use Almost Every Day as a Developer & Freelancer

Working online means constantly switching between different websites just to complete simple tasks.

Sometimes I need to generate an invoice.

Other times I need to compress an image before uploading it.

Sometimes I need to merge PDFs or quickly generate a QR code.

After doing this for years, I realized I was wasting time searching for different tools every day.

That's why I built 360ToolHub—a collection of free online tools that work directly in your browser.

No registration.

No subscriptions.

Just open the tool and get your work done.

My Favorite Tools

Invoice Generator
Resume Builder
Merge PDF
Compress PDF
Image Compressor
Image Resizer
QR Code Generator
Word Counter
Age Calculator
EMI Calculator
BMI Calculator
Percentage Calculator

Why Browser-Based Tools?

There are a few reasons why I prefer browser-based utilities:

Faster than installing software
Works on any device
No account required
No unnecessary downloads
Great for quick everyday tasks

What's Next?

I'm continuously adding more tools based on real-world needs.

Some future ideas include:

Password Generator
JSON Formatter
UUID Generator
JPG to PDF
PDF Splitter

If you use a browser-based tool every day, I'd love to know which one.

Website:
https://360toolhub.com

productivity
webdev
opensource
tools