Short, practical how-tos. Each one ends with the free tool that does the job in your browser.
Make a PDF small enough for email or upload forms, step by step, without installing anything.
4 min read
Why iPhone photos are HEIC, why some apps can't open them, and how to turn them into JPG in seconds.
3 min read
Combine invoices, scans or chapters into a single PDF in the order you want, for free.
3 min read
Photos can reveal where you live. Learn what EXIF data is and how to strip it before you share.
4 min read
What actually makes a password strong, why length beats symbols, and when to use a passphrase.
5 min read
Percent of a number, percentage change and reverse percentages, with simple formulas and worked examples.
4 min read
Turn photos, scans or screenshots into a single PDF, choose page size and order, in your browser.
3 min read
Change pixel dimensions, keep the aspect ratio and cut the file size for web, email or social media.
4 min read
Save every page, or just the ones you need, as JPG or PNG images for slides, chats and social posts.
3 min read
Make a QR code that scans reliably, add your logo and colors, and avoid the mistakes that break codes in print.
4 min read
Let customers message you in one tap: build a wa.me link with a pre-filled message and a QR code.
3 min read
The formulas to add VAT to a net price or take it out of a gross price, with worked examples and common mistakes.
4 min read
Years, months and days, total days, business days and leap years, explained with examples.
3 min read
Make unreadable JSON readable, find the exact line of a syntax error, and fix the mistakes that break it most often.
4 min read
Count words, characters and reading time, and fit posts, meta descriptions and essays into their limits.
3 min read
Pull out the pages you need or break a long PDF into separate files, without losing quality.
3 min read