The Blog

Guides, tips, and updates on getting the most out of our free browser-based tools.

Oct 24, 2026

How to Convert HEIC to JPG on Windows, Mac, iPhone and Android

iPhones save photos as HEIC to save space, but many apps and websites still expect JPG. Here's what HEIC is and every easy way to convert it, including in your browser with no upload.

5 min read Read Article
Oct 24, 2026

How to Compress a PDF Without Losing Quality (and When You Can't)

Most oversized PDFs are big because of images, not text. Learn what makes a PDF heavy, what each compression level does, and how to hit a size limit without making the document unreadable.

5 min read Read Article
Oct 24, 2026

Lakh and Crore to Million and Billion: Conversion Guide with Table

1 million is 10 lakh, 1 crore is 10 million and 100 crore make 1 billion. Here's the full conversion table, the comma rules, and quick tricks to switch between the two systems in your head.

5 min read Read Article
Oct 24, 2026

How to Calculate Percentages: 7 Formulas with Worked Examples

Percent of a number, what percent one number is of another, increases and decreases, reverse percentages, percentage difference and percentage points, each with a formula and a worked example.

4 min read Read Article
Oct 24, 2026

How to Calculate EMI: Formula, Worked Examples and Ways to Pay Less Interest

EMI = P × r × (1+r)^n ÷ ((1+r)^n − 1). We break the formula down, work through a ₹10 lakh and a ₹50 lakh loan, and show how tenure, rate and prepayments change what you really pay.

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Oct 24, 2026

How to Merge PDF Files into One (Free, on Any Device)

Need to send one PDF instead of five? Here's how to merge PDFs in your browser without uploading them, the built-in options on Mac and iPhone, and fixes for locked files and mixed page sizes.

4 min read Read Article
Oct 24, 2026

Wi-Fi QR Code: Let Guests Join Your Network Without Typing the Password

A Wi-Fi QR code lets guests join your network by pointing their camera at it. Here's how to make one, which phones can scan it, how to keep it secure, and how to print it so it scans first time.

5 min read Read Article
Oct 24, 2026

How to Password Protect a PDF (and Remove the Password Later)

Password protecting a PDF encrypts it so it can't be opened without the password. Here's how to add one with AES-256 encryption, how to choose and share it safely, and how to remove a password you know.

5 min read Read Article
Oct 24, 2026

How Long Should a Password Be? Length, Entropy and Passphrases Explained

At least 12 random characters for everyday accounts, 16 or more for the ones that matter. Here's the maths behind that advice, what NIST now recommends, and how to manage strong passwords without remembering them.

5 min read Read Article