Guides

Practical instructions for choosing options and checking the result.

How to merge PDFs in the right order

Combine documents, supporting evidence and appendices into an ordered copy, then check it before sharing.

How to split a PDF into pages or ranges

Separate chapters or pages into multiple files and learn when a single extracted selection works better.

How to extract PDF pages into one file

Save selected pages and control the order of the copy while keeping the original document intact.

How to duplicate PDF pages without changing their order

Add copies beside their originals and distinguish extra copies from total appearances.

How to insert blank pages into a PDF

Create dividers or note space before or after selected sheets while matching their dimensions.

How to number a PDF while leaving its cover unnumbered

Distinguish physical sheets from visible numbers and configure the sequence on the final document.

How to add a watermark to a PDF

Identify drafts or copies with a readable notice and understand its limits as a protection measure.

How to add a logo or image to a PDF

Prepare a sharp image, preserve readability and apply your logo to the final document version.

How to convert JPG, PNG or WebP images to PDF

Order photos, receipts or screenshots and choose original dimensions or A4 while preserving proportions.

How to interleave pages from two PDFs

Rebuild double-sided scans by alternating files and correct back-side pages saved in reverse order.

How to split odd and even PDF pages

Create alternating groups, count from the first sheet and run a test before manual double-sided printing.

How to crop PDF margins without confusing cropping with deletion

Hide scan borders with careful measurements and understand why contents may remain inside the file.

How to add PDF margins for notes or printing

Enlarge sheets without scaling their contents and check dimensions and interactive elements in the copy.

How to delete pages from a PDF

Remove unwanted sheets by number or range and keep the others in their original order.

How to rotate a PDF and save its orientation

Correct sideways or upside-down sheets and save the change in a downloadable copy.

How to reorder PDF pages with an exact sequence

Move, repeat or omit sheets by entering the complete order of the output copy.

How to download and save a PDF on your phone

Find the downloaded copy, save previews and open ZIP archives produced by the tools.

How to merge PDFs on your phone

Select phone documents, order them with touch controls and save a copy without installing another application.

How to extract a single page from a PDF

Save a receipt or specific sheet as a standalone PDF and check its physical position.

How to count Unicode characters and words

Understand spaces, line breaks and emoji so you can interpret text counts accurately.

PNG, JPG or WebP: what changes when converting an image

Choose by content and transparency, then compare the output without assuming it will always be smaller.

How to resize an image without distortion

Calculate proportional dimensions and distinguish changing size from cropping the frame.

How to calculate percentages and percentage change

Distinguish a percentage of a quantity, a proportion between quantities and change from an initial value.

How to validate, format and minify JSON

Recognize syntax errors and understand what the browser’s JSON parser preserves.

How to encode and decode Base64 with UTF-8 text

Convert accents and emoji correctly and distinguish encoding from encryption.

How to generate and save random passwords

Choose length and character groups without treating a generated password as an absolute security guarantee.

How to create and check a readable QR code

Encode text or direct links and verify contrast, margin and destination before sharing the code.