Blog
Practical guides and SEO tips — how to convert, edit and optimize your files, each paired with a free tool that does the work.
How to Audit Your Website's SEO for Free: A 10-Point Checklist
A practical 10-point technical SEO checklist you can run today, free — each step paired with a tool that does the work for you.
8 Free Alternatives to Adobe Acrobat (No Sign-Up Needed)
Skip the subscription — 8 free, private, browser-based tools that cover everything most people use Acrobat for.
How to Sign a PDF for Free (No Printing, No Scanning)
Add your signature to a PDF without printing or scanning — free, in your browser, and nothing uploaded.
Core Web Vitals Explained (and How to Test Yours for Free)
LCP, INP and CLS in plain English — what they mean, why they affect rankings, and how to measure and fix them for free.
JPG vs PNG vs WebP: Which Image Format Should You Use?
When to use JPG, PNG or WebP — the strengths of each, a simple decision rule, and a free converter.
HEX, RGB and HSL: A Simple Guide to CSS Colors
What HEX, RGB and HSL actually mean, when to reach for each, and how to convert between them in a click.
How to Compress Images Without Losing Quality
Make images smaller and pages faster without visible quality loss — the formats, sizes and settings that matter, with a free tool.
How to Create a Strong Password (Why Length Beats Complexity)
The real rules for strong passwords: length beats complexity, uniqueness beats everything. Plus a free generator and strength tester.
What Is an SSL Certificate? (And How to Check Yours)
What the padlock really means, why HTTPS matters for trust and SEO, and how to check any certificate's validity and expiry free.
How to Calculate Your GPA (Step by Step, with a Free Calculator)
How the 4.0 scale works, how to weight courses by credit hours, and how to find your semester and cumulative GPA — free.
How to Calculate a Percentage (with Simple Examples)
The three percentage calculations you actually need — of a number, percent change, and 'what percent' — with formulas and examples.
How to Calculate BMI (Formula, Categories and What It Means)
The BMI formula, what the categories mean, and — importantly — what BMI doesn't tell you. Plus a free calculator.
What Is a UTM Link? How to Build and Track Campaign URLs
UTM parameters, explained simply — what each tag does, naming conventions that keep your data clean, and a free builder.
What Is Base64 Encoding? A Plain-English Explainer
Base64, explained simply — what it does, why it's not encryption, where it's used, and how to encode or decode for free.
What Is JSON? A Beginner's Guide (with Examples)
JSON explained for beginners — the syntax, the rules that trip people up, and free tools to format, validate and convert it.
What Is a Hash Function? MD5, SHA-256 and Checksums Explained
Hashing explained simply — what MD5 and SHA-256 do, why it's one-way and not encryption, and where you'll meet it.
How Compound Interest Works (and Why Starting Early Wins)
Compound interest, explained with plain examples — why time beats amount, and how to project your own savings growth.
How to Write a Meta Description That Gets Clicks
What a meta description is, the ideal length, and how to write ones that actually earn the click — with free tools to check them.
How to Convert Time Zones (Without the Headache)
Stop botching cross-timezone meetings — how offsets and daylight saving work, plus a free converter that does the math.
How to Make a QR Code for Free (No App, No Sign-Up)
Make a free QR code for a link or text in seconds — no app, no account, and it never expires.
How to Edit a PDF for Free Online (Without Acrobat)
Change the text in a PDF, sign it, or reorganize pages — free, in your browser, with no Acrobat and nothing uploaded.
How to Merge PDF Files for Free (No Upload, No Sign-Up)
Combine several PDFs into one, free and private — no upload, no watermark, no account. Plus splitting and reordering.
How to Split a PDF for Free (Extract or Separate Pages)
Break one PDF into separate files or pull out just the pages you need — free, private, no upload.
How to Convert a PDF to JPG or PNG (Free, No Upload)
Turn PDF pages into JPG or PNG images — free and private, for thumbnails, slides or embedding anywhere.
How to Read a WHOIS Record (and Check When a Domain Expires)
Decode a WHOIS record line by line — registrar, dates, nameservers and status codes — and check any domain's expiry free.
How to Extract Text From an Image for Free (OCR, Nothing Uploaded)
Copy the text out of any screenshot, photo or scan with free in-browser OCR — no upload, no account.
How to Convert Photos to PDF for Free (No Watermark, No Sign-Up)
Combine photos into one clean PDF in seconds — free, no watermark, no sign-up, and nothing uploaded to a server.