Guides

Practical, step-by-step guides written by M Alamgir Saeed: how to get files to the right size, pick the right format and finish everyday tasks faster.

How to compress a PDF for email

Email attachment limits explained, plus a step-by-step way to shrink a PDF in your browser so it sends first time. No upload, no sign up, no watermark.

JPG vs PNG vs WebP vs AVIF: which image format should you use?

A plain-English comparison of JPG, PNG, WebP and AVIF: quality, file size, transparency and browser support, with a simple rule for picking the right format.

How many words is a page?

How many words fit on a page single- or double-spaced, how long a 5-page essay is, and how reading time is worked out, with a quick table for common lengths.

How to remove the background from an image

Remove a photo background in seconds without uploading it: how AI cut-outs work, how to get clean edges on hair and products, and when to use PNG or WebP.

How to create a strong password

What makes a password strong today, based on the latest NIST guidance: length over complexity, passphrases, no forced changes, and why a password manager helps.

How to convert a PDF to Word

Turn a PDF into an editable Word document: what converts well, what does not, how to handle scanned PDFs, and how to do it without uploading your file.

How to make a QR code that always scans

Create a QR code for a link, Wi-Fi or contact details, choose the right size and error correction level, and test it before you print, all for free.

How to calculate percentages

The three percentage formulas you actually need, with worked examples for discounts, tips, grades and percentage change, plus common mistakes to avoid.