The Toolszy Blog
Guides & how-tos
Practical guides on calculators, converters, images and more — with the free tools to do it.
TDS Explained: What It Is and How to Calculate It (India)
Understand TDS (Tax Deducted at Source) — common sections and rates for interest, rent and fees — and calculate it free in seconds.
NPS vs PPF vs EPF: Which Retirement Plan Is Best in 2026?
Compare NPS, PPF and EPF on returns, risk, lock-in, tax and pension — with free calculators to project your own retirement corpus.
How to Merge PDF Files for Free (No Upload, No Signup)
Combine multiple PDFs into one file for free — right in your browser, with nothing uploaded. Plus how to split, rotate and convert PDFs.
How to Find a Job Online: 6 Best Free Job Search Sites (2026)
The best free job search sites in India and worldwide — plus how to build an ATS-friendly resume and apply faster with free tools.
SIP vs Lumpsum vs PPF: Where Should You Invest in 2026?
A simple comparison of SIP, lumpsum and PPF investments — risk, returns, lock-in and tax — with free calculators to project your own growth.
Income Tax on Salary in India (FY 2025-26): New Regime Slabs Explained
New Tax Regime slabs for FY 2025-26, the ₹12 lakh rebate, standard deduction and HRA — explained simply, with free calculators to check your own tax.
7 Best Free Online PDF Tools (No Signup, Nothing Uploaded)
Edit, sign, split and convert PDFs for free — right in your browser. These 7 privacy-first PDF tools need no signup and never upload your files.
How to Calculate Fuel Cost for a Road Trip
A simple way to estimate the fuel cost of any journey from distance, mileage and fuel price — with a free calculator.
LCM and HCF Explained (with Simple Examples)
What LCM and HCF mean, how to find them by hand, where they're used, and a free calculator.
How to Choose Colors for Your Website
Practical tips for building a website color scheme that looks good and stays accessible, with free color tools.
Time Management: Simple Techniques and Free Timers
Proven time-management methods like Pomodoro and time-boxing, and the free timers to put them into practice.
How to Write a Cover Letter That Gets Read
A simple structure for a strong cover letter, what to include (and skip), and a free generator to start fast.
Binary, Decimal and Hexadecimal Explained
A beginner-friendly guide to the number systems computers use, how they relate, and free converters to switch between them.
How to Calculate Gratuity in India
What gratuity is, who's eligible, the official formula, and a free calculator to estimate your amount.
Understanding Inflation and How It Erodes Your Savings
What inflation is, why money loses value over time, and how to calculate the future cost of things — with a free tool.
How Many Calories Should You Eat a Day?
How daily calorie needs are calculated from BMR and activity, and how to use them for weight goals — with a free calculator.
FD vs RD: Which Is Better for Your Savings?
The difference between a fixed deposit and a recurring deposit, when each makes sense, and free calculators to compare returns.
How to Find the Best Hashtags and Usernames
Tips for choosing hashtags that grow your reach and usernames that stand out, plus free generators.
UTM Parameters: How to Track Where Your Traffic Comes From
What UTM parameters are, how to use them in Google Analytics, and a free UTM link builder.
How to Write SEO Meta Tags That Get Clicks
How to write title tags and meta descriptions, use clean URLs and keywords, and free SEO tools to help.
Unix Timestamps Explained (and Handy Time Tools)
What a Unix timestamp is, why developers use it, ISO week numbers, and free tools for working with time.
How to Calculate the Number of Days Between Two Dates
Easy ways to count days, weeks and months between dates, work out your exact age, or find a future date.
What Is Hashing? SHA-256, JWTs and Developer Security Basics
A plain-English intro to hashing, how SHA-256 works, what a JWT is, and free developer security tools.
How Strong Is Your Password? Password Security Explained
What makes a password strong, how attackers crack weak ones, and free tools to test and create secure passwords.
How to Sign Documents Online for Free
Simple, private ways to add a signature to documents without printing — draw and download a signature image.
Cooking Conversions: Cups, Grams, Oven Temps & More
A handy guide to kitchen conversions — cups to ml, scaling recipes, and oven temperatures across countries.
How to Copy and Paste Emojis, Symbols & Kaomoji
How emojis and kaomoji work as text, and how to copy and paste them anywhere for free.
Spin the Wheel: Fair Ways to Pick a Random Winner
Fun, fair ways to make random choices — spin a wheel, flip a coin or let a decision maker choose.
How to Check (and Improve) Your Content's Readability
What readability scores mean, why they matter for SEO and engagement, and free tools to measure your writing.
How to Create Beautiful CSS Gradients
A designer's guide to CSS gradients — linear vs radial, choosing colors, and a free gradient generator.
Scientific Calculator: Functions You Should Know
A quick guide to the key scientific calculator functions — trig, logs, powers and roots — plus free math tools.
How to Calculate Your GPA (Step by Step)
How GPA is calculated on the 4.0 scale, how credits are weighted, and free calculators for GPA and final grades.
How to Cite Sources in APA, MLA and Chicago
The difference between APA, MLA and Chicago citation styles, when to use each, and a free citation generator.
The Pomodoro Technique: Focus Better in 25-Minute Sprints
How the Pomodoro technique works, why it beats marathon study sessions, and free timers to try it today.
How to Choose a Business Name (with Free Idea Generator)
Practical tips for picking a memorable, brandable business name — and a free generator to spark ideas.
How to Create an Invoice for Free (Simple Guide)
What to include on a professional invoice, invoicing tips for freelancers and small businesses, and how to make one free in minutes.
How to Write an ATS-Friendly Resume (2026 Guide)
What an ATS is, why most resumes get rejected before a human sees them, and how to format yours to get through.
How to Compress Images Without Losing Quality
Why image size matters, how compression works, and how to shrink JPG and PNG files in your browser without an obvious drop in quality.
Color Contrast & Accessibility: A WCAG Basics Guide
Why color contrast matters for accessibility, what the WCAG ratios mean, and how to check your colors.
How to Calculate GST in India (Simple 2026 Guide)
Learn how to add and remove GST at 5%, 12%, 18% and 28%, understand CGST vs SGST, and use a free GST calculator with examples.
Hex, RGB & HSL: A Simple Guide to Color Codes
What HEX, RGB and HSL color codes mean, how they differ, and how to convert between them for web design.
How to Calculate Loan EMI: Formula, Example & Free Calculator
Understand exactly how your loan EMI is calculated with the formula, a worked example, and a free EMI calculator to try your own numbers.
What Is Markdown? A Beginner's Guide
A friendly introduction to Markdown — the simple formatting language used by GitHub, Reddit, notes apps and more.
How to Calculate Percentage of a Number (with Money Examples)
Master everyday percentages — what X% of a number is, percentage change, and reverse percentage — with real money examples for shopping, tips and interest.
What Is Base64 Encoding? A Simple Guide for Developers
What Base64 is, why it exists, where it's used, and how to encode or decode it safely in your browser.
How to Merge PDF Files for Free (Without Uploading)
Why you might merge PDFs, and how to combine them safely in your browser without uploading sensitive documents.
How to Write Numbers in Words (Indian Rupees)
The Indian numbering system explained — lakh and crore — and how to write any amount in words for cheques.
BMI Explained: What Your Number Really Means
How Body Mass Index is calculated, what the ranges mean, and the limits of BMI as a health measure.
How to Convert CSV to JSON (Quick Guide)
What CSV and JSON are, when to convert between them, and how to do it instantly and privately in your browser.
How to Split a PDF and Extract Pages (Free)
How to pull specific pages out of a PDF into a new file, privately, without any software.
What Is a QR Code and How to Make One for Free
A quick guide to what QR codes are, how they work, and how to create your own free QR code in seconds.
Text to Speech: Turn Any Text into Audio Free
What text-to-speech is good for and how to listen to any text read aloud right in your browser.
How to Create a Strong Password (and Why Length Matters)
Simple, practical rules for creating strong, memorable passwords — and why length beats complexity.
How to Get Fancy Fonts for Your Instagram Bio
How those stylish Instagram fonts actually work and how to create your own fancy text in seconds.
Compound Interest Explained (with Formula & Examples)
What compound interest is, how the formula works, and why compounding frequency and time matter so much for your money.
How to Convert Images to PDF (Free & Private)
Why you might turn images into a PDF and how to do it safely in your browser without uploading anything.
SIP vs Lump Sum: Which Is Better for You?
Understand the difference between SIP and lump-sum investing, the pros and cons of each, and how to estimate your returns.
How to Convert PNG to JPG (Free, No Upload)
When to use JPG vs PNG, and how to convert images between formats privately in your browser.
How to Calculate Percentage of Marks in Exams (Students' Guide)
Work out your exam percentage for one subject or your full aggregate, understand pass marks and grade bands, and see how percentage differs from percentile and CGPA.
How to Convert CGPA to Percentage (CBSE & Others)
The simple formula to convert CGPA to percentage, why CBSE uses 9.5, and a free calculator to do it instantly.