Guides & How-tos
Short, practical guides: compress images and PDFs, merge PDFs privately, make a Wi-Fi QR code, remove a background and write good title tags.
All guides
How to compress images for the web without losing visible qualityA practical guide to choosing the right format, size and quality setting so your images load fast and still look sharp.How to merge PDF files privately, without uploading themCombine several PDFs into one in your browser, put pages in the right order, and keep confidential documents on your device.How to make a Wi-Fi QR code your guests can scanCreate a QR code that connects phones to your Wi-Fi network without typing the password, print it, and keep it secure.How to open HEIC photos on Windows (and convert them to JPG)Why iPhone HEIC photos will not open on Windows, three ways to fix it, and how to convert them to JPG privately in your browser.How to reduce a PDF’s file size for email and upload formsWhy PDF files get large, how to shrink scanned and text documents, and when sending fewer pages is the better fix.How to make a passport photo at homeTake, crop and print a passport or visa photo from your phone: framing, background, file-size limits and print sheets, plus what to check first.How to remove a background from a photo without uploading itCut out a subject on a transparent, white or coloured background in your browser, with tips for cleaner edges, hair and product photos.How to sign a PDF without printing itDraw, type or upload your signature and place it on a PDF on your own device, plus when an image signature is enough and when it is not.What to include on an invoice (with a free generator)A practical checklist of what an invoice should contain, how tax and discounts are usually calculated, and how to make a clean PDF in your browser.How to create and check a strong passwordWhy length beats complexity, how to generate random passwords privately, and what a strength checker can and cannot tell you.How to write good meta titles and descriptionsPractical rules for page titles and meta descriptions: length in pixels, wording and uniqueness, and how to preview and generate the tags.How to compress an image to 100 KB for upload formsWhy forms ask for small images, how to reach 100 KB or 50 KB without ruining the photo, and what to do when a file will not get small enough.How to check that a tool does not upload your filesTwo simple checks, the browser’s Network tab and offline mode, to see whether a PDF or image tool works on your device or sends the file to a server.