Guides
Clear, step-by-step articles that show how to get common document, image and calculation jobs done, and what to watch out for.
How to Merge PDF Files Online for Free
Combine several PDFs into one file in the order you want, without installing software or uploading your documents.
2 min readHow to Compress a PDF for Email
Email services limit attachment size. Here is how to shrink a PDF, what to expect, and when compression will not help.
2 min readHow to Extract Pages from a PDF
Keep only the pages you need from a long PDF, using simple page ranges such as 1-3,5.
2 min readHow to Convert JPG and PNG Images to a PDF
Turn photos, scans and screenshots into a single PDF document, with the pages in the order you choose.
2 min readHow to Calculate EMI: Formula and a Worked Example
Understand how a loan instalment is calculated, how the period changes the interest you pay, and how to check a bank offer.
2 min readHow to Password-Protect and Unlock a PDF
Add a password to a private PDF, or remove the password from a file you own, directly in your browser.
2 min readHow to Reduce Image Size Without Losing Quality
Make photos small enough for websites, forms and email while keeping them sharp.
2 min readHow to Calculate Percentages and Discounts
Simple methods and worked examples for sales, extra discounts, tax and percentage change.
2 min readHow to Create a Favicon for Your Website
Make the small icon that appears in browser tabs, bookmarks and phone home screens, in every size you need.
2 min readHow to Sign a PDF Without Printing It
Add your drawn or typed signature to a PDF and place it exactly where it belongs.
2 min readAre Online File Tools Safe? How Browser-Based Tools Protect Your Files
Some sites upload your documents to a server. Others process them on your device. Here is the difference and how to check for yourself.
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