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Guides & Tips
Practical guides on PDF tools, file conversion, invoicing, and productivity. No fluff, no filler.
Free Online Quote Generator — Create Professional Quotes Instantly
Create professional business quotes free online. Learn what a quote must include, how it differs from an invoice or estimate, and tips to win more clients.
Free QR Code Generator — Create QR Codes for URL, WiFi, and More
Create free QR codes for websites, WiFi passwords, contacts, and payment links. Covers PNG vs SVG for print, design tips, and common QR code mistakes to avoid.
How to Convert HEIC to JPG — 3 Free Methods (iPhone Photo Fix)
iPhone saves photos as HEIC but Windows can't open them. Here are 3 free ways to convert HEIC to JPG — online tool, iPhone settings change, and Windows Photos app.
Age Calculator — Calculate Your Exact Age in Years, Months, Days and Hours
Calculate your exact age in years, months, days, and hours. Covers manual age calculation, leap year edge cases, age for legal documents, and days until your next birthday.
How to Generate a Strong Password (Free Online Tool)
What makes a password strong, the most common mistakes, and how to use a free password generator to create secure, memorable credentials.
Word Limits Explained — Twitter, LinkedIn, Instagram, Essays and More
Character and word limits for every major platform: Twitter/X, LinkedIn, Instagram, Facebook, college essays, blog posts, SMS, and email subject lines.
VAT Interest Calculation — How Late Payment Penalties Work
How HMRC, SARS, FIRS, ZIMRA, and KRA calculate late VAT payment interest. Worked examples, how to avoid penalties, and what to do if you receive a notice.
How Many Words Is 280 Characters? (Twitter Word Count Guide)
280 characters is approximately 40–55 words. A quick guide to Twitter's character limit, word count estimates, and writing concise tweets.
Compound Interest Calculator — How Compound Interest Works (With Examples)
The compound interest formula explained, how compounding frequency affects growth, the power of starting early, and worked examples at $5K and $10K.
BMI Calculator — What Is BMI and How Do You Calculate It?
What BMI is, how to calculate it, the four categories, limitations of BMI for muscle mass and ethnicity, and when BMI is and isn't a useful measure.
UUID Generator — What Is a UUID and When Should You Use One?
What is a UUID, when should you use v4 vs v7 vs ULID, and how do they affect database performance? A practical guide with a free generator.
Tip Calculator — How Much Should You Tip? (By Country and Service Type)
How much to tip at restaurants, hotels, and taxis in the US, UK, Europe, Australia, and Japan. The math, bill splitting, and when not to tip.
How to Convert PNG to JPG Free Online (3 Easy Ways)
Three ways to convert PNG to JPG free: an online tool, Windows Paint, and Mac Preview. When to use each, quality settings, and batch conversion tips.
Random Number Generator — Free Online Randomizer for Any Use Case
True vs pseudo-random, why crypto randomness matters, dice probability, and practical use cases: giveaways, sampling, games. Free randomizer tool.
Loan Calculator — How to Calculate Monthly Payments and Total Interest
How monthly loan payments are calculated, what amortization means, how extra payments save money, and how mortgages, car loans, and personal loans compare.
Zimbabwe VAT Calculator — ZIMRA 15% VAT Guide for Businesses
Zimbabwe's 15% VAT: ZIMRA registration, zero-rated food, exempt supplies, USD vs ZiG, worked examples, and quarterly vs monthly filing explained.
How Strong Is Your Password? Use Our Free Password Strength Checker
Learn what actually makes a password strong, how strength is measured, and how to test any password instantly with a free online checker.
Text Case Converter — Change Text to UPPERCASE, lowercase, Title Case Free
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, and kebab-case instantly. When to use each format and a free online tool.
How to Resize an Image Online Free (Without Losing Quality)
Learn how to resize any image to exact dimensions or a percentage, when to use each output format, and how to maintain quality. Free online tool included.
WebP to PNG — Convert WebP Images to PNG Free Online
Learn what WebP is, why you might need to convert it to PNG, and how to convert WebP to PNG free in seconds — no software or account needed.
Lorem Ipsum Generator — What It Is and How to Use Placeholder Text
What lorem ipsum actually is, where it came from, why designers use it, and when to switch to real content. Plus a free lorem ipsum generator.
Free Barcode Generator — Create EAN-13, UPC-A and Code 128 Barcodes Online
Barcode types explained: Code 128, EAN-13, UPC-A, EAN-8, ISBN. When to use each, the EAN vs UPC difference, and how retailers use barcodes. Free generator.
Age Calculator — Calculate Your Exact Age in Years, Months and Days
How age is calculated precisely, why it matters for legal and medical purposes, leap-year edge cases, and a free online age calculator.
Percentage Calculator — How to Calculate Percentages (With Examples)
The three types of percentage problems, worked examples with tips and discounts, percentage vs percentage points, and common mistakes to avoid.
Color Picker — How to Convert HEX, RGB and HSL Color Codes
What HEX, RGB, and HSL color formats mean, when to use each in CSS, how to check WCAG accessibility contrast ratios, and a free online color picker.
Hash Generator — SHA-256, MD5 and File Integrity Checking Explained
What cryptographic hashing is, SHA-256 vs MD5, why MD5 is deprecated for security, file integrity verification, and how to generate hashes free online.
What Is My IP Address and Why Does It Matter?
What an IP address actually is, how websites use it, IPv4 vs IPv6, public vs private IPs, and what your IP reveals about you. Plus a free IP lookup tool.
What Can Websites See About You? (Browser Privacy)
Every website you visit collects your user agent, screen size, timezone, and more — automatically. Here's what they actually see and how to limit it.
How to Embed a Free PDF or Invoice Tool on Your Website (Copy-Paste Code)
Add a free PDF compressor, invoice generator, QR code maker, or VAT calculator to your site with a single iframe. Auto-resizing widgets, no signup, no API key.
Base64 Encoder/Decoder — What It Is and How to Use It
Learn what Base64 encoding is, why it exists, and how to encode and decode text or files instantly. Common uses, worked examples, and a free online tool.
JSON Formatter — How to Format and Validate JSON Online
Learn what JSON is, why formatting matters, how to spot common JSON errors, and how to format or validate any JSON instantly with a free online tool.
Kenya VAT Calculator — How to Calculate 16% VAT (KRA Guide)
Calculate Kenya's 16% VAT with our free KRA guide. Learn how to add or remove VAT, check the KSh 5M registration threshold, and see worked KES examples.
India GST Calculator — How to Calculate GST Online Free
Learn how India's GST works: the 5-slab rate structure, CGST vs SGST vs IGST, registration thresholds, and how to add or remove GST from any INR amount.
How to Create a Receipt for Payment (Free Template)
Create a professional receipt for payment in seconds — free, no signup, instant PDF. Covers what every receipt needs, numbering, and the difference from an invoice.
Profit Margin Calculator — Calculate Margin and Markup Free
Calculate profit margin, markup, and selling price free. Covers the margin vs markup difference, what a good profit margin is by industry, and worked examples.
Nigeria VAT Calculator — How to Calculate 7.5% VAT (2026)
Calculate Nigeria's 7.5% VAT quickly and accurately. Learn how to add or remove VAT, check FIRS registration thresholds, and see worked examples in Naira.
UAE VAT Calculator — How to Calculate 5% VAT in the UAE
Everything you need to know about UAE VAT: 5% rate explained, zero-rated vs exempt supplies, FTA registration thresholds, and worked AED examples.
How to Compress a PDF for Email (Free, Without Losing Quality)
Learn how to compress a PDF for email in 3 easy steps. Free, no signup. Works on Gmail, Outlook, and all email clients. Realistic size reduction estimates included.
How to Convert JPG to PDF Free Online (No App Required)
Convert any JPG or PNG image to PDF online for free. No app needed — works on iPhone, Android, and desktop. Combine multiple images into one PDF in seconds.
The Best Free Invoice Generator for Small Businesses (No Signup)
Create a professional invoice in under 2 minutes. Free invoice generator — no signup, no watermark. Includes line items, tax calculation, logo upload, and instant PDF download.
How to Merge PDF Files Online Free (No Software Needed)
Learn how to merge PDF files online in seconds — no software, no signup. Covers page ordering, large file tips, and when to compress after merging.
How to Convert HEIC to JPG Free (iPhone Photos Fix)
HEIC photos from your iPhone won't open on Windows? Here are 3 free ways to convert HEIC to JPG — online, via iPhone Settings, and Mac Preview.
How to Create an Invoice in South Africa (Free Template)
Complete guide to South African invoice requirements — what SARS requires, VAT invoice rules, how to number invoices, and how to create free ZAR invoices with Criply.
How to Compress Images for Your Website (Free, No Quality Loss)
Compress images for your website without losing quality. Improve Core Web Vitals scores, speed up page loads, and rank higher on Google. Free, no signup.
How to Create a QR Code Free (For Any URL, WiFi, or Contact)
Create a QR code free for URLs, WiFi networks, contacts, and more. PNG and SVG download, print sizing tips, and how to make a WiFi QR code in under a minute.
How to Convert PNG to JPG Free Online (And When You Should)
Convert PNG to JPG free in your browser — batch up to 20 files. Learn when each format is the right choice, what happens to transparency, and real file size comparisons.
How to Create a Strong Password (Free Generator + Tips)
Learn what actually makes a password strong, why length beats complexity, and how to generate cryptographically secure passwords free. Plus password manager tips.
How to Split a PDF into Separate Pages (Free, Online)
Split a PDF into individual pages, custom ranges, or extract specific pages. Free online tool — no software, processed in your browser. Step-by-step guide.
South Africa VAT Calculator — How to Calculate 15% VAT
Calculate 15% VAT in South Africa — add VAT to a price or remove VAT from a total. Worked examples in ZAR, registration thresholds, and SARS invoice requirements.
Word Count Tool — Count Words, Characters & Reading Time Free
Count words, characters, sentences, and reading time instantly. Free online word counter with platform limits for Twitter, LinkedIn, and meta descriptions.