File Converters

PDF Size Converter

The PDF format allows us to create documents of different sizes - A5, A3, letters, etc. Sometimes you need to unify the format of a bunch of pages but keep the style intact. The best and easiest way to convert PDF page size is by using the PDF size converter from our site. Your document will be ready in just a few minutes!

Quick answer: To change PDF page size with Total PDF Converter, open the folder with your PDF files, check the documents you want to resize, click the PDF icon to launch the wizard, pick the new size (such as A3 or A4) and orientation, then click Start. Every selected file is resized in one batch while the original layout and content stay intact.

How to Change PDF Page Size

Total PDF Converter is extraordinary - it is a powerful all-purpose solution. Aside from transforming PDFs into other formats, it facilitates modification in a variety of ways. Change PDF page size or the appearance and content of any document according to your needs.

PDFConverter

Convert A4 to A3 Size in PDF

Here is how to change PDF page size and switch between these formats quickly and easily. After opening the converter, there are just a few simple steps.

Browse to the folder with your A4 files and click on it.
Check the box next to each PDF you want to be resized.
Click the PDF icon at the top bar to launch the wizard.
Pick the size (A3) and orientation.
Click Start to convert PDF page size.

TotalPDFConverter

Convert A3 to A4 Size in PDF

The procedure for this is similar. Open the PDF size converter, pick the source files, and launch the wizard. Choose A4 as the destination format, select the desired orientation, and click Start! If you need to change PDF page size, this is as easy as 1-2-3!

TotalPDFConverter A4

Other Useful Features

You can merge PDF files even if some originals are bigger than others - unify and change PDF page size in a click! However, the system doesn't just convert PDF page size. It has many more helpful features. For example, you can:

Extract pages (odd, even, or a range) and turn the selection into a new PDF;
Add bookmarks in three ways;
Add blank pages;
Convert to a specific subtype like PDF 1.0 - 1.5;
Compress the output files to save space.

Get a trial version of the PDF size converter to try it for free! CoolUtils offers flexible licensing. Convert and edit as many PDFs as you like, as often as you like - there are no limits!

Total PDF Converter Customer Reviews 2026

Rate ItRated 4.7/5 based on customer reviews

"Clients send PDFs in every page size imaginable, and we need them unified to A4 before sending files to press. Total PDF Converter resizes an entire folder in one batch — pick A4, choose orientation, click Start, and every file keeps its original layout. Saves us from opening each document individually."

5 Star Diane Kowalski Print Production Coordinator, Meridian Print Group

"We had a mix of letter-size and A3 scanned exhibits that needed to match for a filing. Total PDF Converter let us select the batch, pick the new size, and get consistent A4 output in a few minutes without touching Acrobat. Content stayed intact, no cropping issues."

5 Star Marcus Ellinger Office Manager, Rittenhouse Legal Services

"Our archive had documents mixing A5 and letter formats from different departments. The PDF size converter resized the whole batch to A3 for our new binder standard while keeping the original content untouched. Straightforward wizard, no complicated settings to figure out."

4 Star Priya Nandakumar Records Officer, Chennai Port Authority

Change PDF Page Size — FAQ ▼

How do I change the page size of a PDF?

Open Total PDF Converter, browse to the folder with your PDF files, check the documents you want to resize, click the PDF icon to launch the wizard, pick the new size and orientation, then click Start. Every selected file is resized in one batch.

Can I convert A4 to A3 in a PDF?

Yes. Select your A4 files in Total PDF Converter, launch the wizard, choose A3 as the destination size and the orientation you need, then click Start. The program reflows each page to the new format.

Can I convert A3 back to A4?

Yes. The procedure is the same in reverse. Open the PDF size converter, pick the source files, launch the wizard, choose A4 as the destination size, set the orientation, and click Start.

Does resizing a PDF change its content?

No. Total PDF Converter changes the page dimensions while keeping the text, images, and layout intact. Only the paper size and orientation change, not the document content.

Can I resize many PDF files at once?

Yes. Total PDF Converter handles batch jobs. Tick several files, or a whole folder, and the program applies the same page size to all of them in a single run.

Can I merge PDFs of different sizes into one file?

Yes. With the companion PDFCombine tool you can merge PDF files even when some originals are larger than others, then unify the page size in a click during the same workflow.

What other PDF edits can Total PDF Converter make?

Besides resizing, it can extract odd, even, or a range of pages into a new PDF, add bookmarks, insert blank pages, convert to a specific PDF subtype like 1.0 to 1.5, and compress the output to save space.