In this fast-paced society, people demand efficiency and speed. That is why many people work on the go using their phones to download documents and send emails. It is important to reduce the size of PDF documents on your phone to meet all the needs of your daily lives.
This article will teach you how to compress your PDF document using an iPhone, with its built-in features, mobile apps, and even online tools. Here, you will learn the steps to compress PDF on iPhone, the pros and cons of relevant tools, their pricing, and certain limitations.
How to Compress PDF on iPhone
iPhone has a built-in feature that helps reduce the PDF size without needing any apps. As it is a built-in feature, it is free and convenient.
How to reduce PDF file size on iPhone using Quick Actions in the Files app:
Step 1 Open the Files app on your iPhone and select the PDF document.
Step 2 Tap and hold on to the PDF document; you will see a drop-down. Tap on Quick Actions à Optimize File Size. The app will compress the PDF document to make it smaller and autosave it.

Best for
Fuzz-free and easily accessible.
Fast and convenient without downloading external applications.
Drawbacks
The File app does occasionally get stuck while compressing PDF documents.
It does not work for all PDF documents, especially files that are too large.
PDF Compressors to Reduce PDF File Size on iPhone
In this fast-paced society, people often like to work on the go and send documents fast and effectively. Here are three mobile apps that compress PDF documents quickly and efficiently.
PDFelement for iOS
PDFelement is a full-featured PDF editor that allows you to perform comprehensive functions on PDF documents, including PDF compressing, editing and converting. One good feature of PDFelement is its integration with the iOS system, enabling you to easily compress PDF documents on your iPhone.
How to compress PDF files on an iPhone using PDFelement:
Step 1 Download PDFelement from the Apple App and open the app on your iPhone.
Step 2 Open PDF from the Open File option and select the PDF document you want to compress.
Step 3 Tap on the … icon in the top right corner, and you will see a drop-down menu. Tap on Reduce File Size.

Step 4 You will have the option to select from five different compression levels. Select your desired compression level and tap on Save to save your compressed PDF document.

Best for
Large batch processing
Fast and simple interface
Five different compression levels to satisfy various memory conditions
Prices are reasonable compared to other PDF apps
Drawbacks
Advanced features are only available in the paid version
The batch processing function is slow
Unable to perform word search function on PDF documents
Tip: If you need to compress PDF on Windows and Mac, PDFelement is also available to PC and Mac. The desktop version of PDFelement offer batch compression that allows you to quickly reduce PDF file size in bulk. Moreover, it is an easy-to-use PDF editor to edit, convert, sign, combine PDFs and more.
Adobe Acrobat Reader: Compress PDF
If you have a subscription to Adobe, you can utilize the powerful Adobe PDF editor on your iPhone.
How to reduce PDF size on iPhone using Adobe Acrobat Reader:
Step 1 Download Adobe Acrobat from the Apple App and open the app on your iPhone.
Step 2 Tap on the + icon on the bottom right and tap on Edit PDF.
Step 3 Add PDF document into Adobe Acrobat and tap on the …icon in the top right corner.
Step 4 From the drop-down menu, tap on Compress PDF.

Step 5 You will be able to see the current size of your PDF document and the option to select the desired compression level. Tap on the desired compression level and tap Compress in the top right corner.

Step 6 After compressing, you will see the compressed and original PDF documents.

Best for
Large batch processing with high-quality compression
Able to create PDF files from almost any document
Edit PDF documents from a single platform
Secure and optimizes PDFs
Drawbacks
A free trial is available; however, an expensive subscription plan is needed for more advanced features.
Smallpdf
An alternative to Adobe Acrobat Reader: Edit PDF is Smallpdf. Besides compressing the files, you can edit and annotate PDF documents on your iPhone.
How to reduce a PDF document size on iPhone using Smallpdf:
Step 1 Download Smallpdf from the Apple App Store and open the app on your iPhone.
Step 2 Tap on the + icon at the bottom and add a PDF document from the Files app.
Step 3 Once the PDF document is opened, tap on the … icon in the top right corner. You will see a drop-down menu, and tap on Compress.

Step 4 There are two compression options available, Strong Compression, which reduces up to 75% of your PDF document, and Basic Compression, which reduces up to 40%. Tap on desired compression level.

Step 5 After compressing, you will see the compressed PDF document and the original document.
Best for
Fast compression and allows for batch compressing.
Able to work directly on PDF files.
All documents can be managed in one place.
Drawbacks
Only two compression levels are available.
A free trial is available; however, for more advanced features, a subscription is required.
PDF Compressor for iPhone
The last App recommendation is using PDF Compressor. It does the job of compressing PDF documents and does not require expensive subscription plans.
How to compress PDF on iPhone using PDF Compressor:
Step 1 Download PDF Compressor from the Apple App Store and open the app on your iPhone.
Step 2 Once you open the app, you will have to select your compression level from the following: EXTREME COMPRESSION, RECOMMENDED COMPRESSION, or LESS COMPRESSION. This compression level is equivalent to High, Medium, or low compression.

Step 3 Tap on Select PDF and import the PDF file for compression.
Step 4 Tap on Compress PDF, the and compression will begin.
Step 5 Once compression is completed, a pop-up showing the compression size and percentage will be reflected. Tap on Save Compressed PDF to save the document.

Best for
Free App
Fast compression speed
Safe and secure as all uploads are deleted after 60 minutes
A maximum of 20 PDF documents can be uploaded
Drawbacks
Compression level does not translate to compression percentage
Online PDF Compressors to Reduce PDF File Size on iPhone
If you would like to compress PDF documents on an iPhone without downloading a PDF processing application, online tools are the most effective and time-saving methods. Here are two recommendations on online tools to help compress PDF documents.
iLovePDF
iLovePDF is one of the leading online platforms for easily editing PDF documents. It contains tools like merging, splitting, compressing, and many tools needed to edit PDF documents.
How to compress PDF documents free online using :
Step 1 Go to the iLovePDF compress PDF website on your iPhone.
Step 2 Click on Select PDF files to add a PDF document from your iPhone to compress.
Step 3 You will have three compression levels to choose from. Click on the desired compression level and click on Compress PDF.

Step 5 Once compression is completed, you can see the compressed percentage and click on Download Compressed PDF to save your document.

Best for
Compress multiple PDF documents. You can compress all PDF documents in one go, and compressed PDF documents can be downloaded as a zip file.
Free and unlimited use
Fast compression
Drawbacks
Like all online platforms, you will need strong and stable Wi-Fi to ensure fast compression
Compression level does not translate to compression percentage
PDF24 Tools
PDF24 Tools is a free online platform that offers solutions to all PDF needs. From converting PDF documents to merging to compression, PDF24 Tools got you covered.
How to make PDF smaller on iPhone through PDF24 Tools:
Step 1 Go to PDF24 Tools website by clicking on the link on the header.
Step 2 Click on the Compress PDF icon.
Step 3 Click on Choose files to add a PDF document to compress.

Step 4 Once uploaded, click on Compress.
Step 5 Once compression is completed, you will see the compression and percentage compressed summary, and you can download the file to save it.
Best for
Free and unlimited use
Fast compression
Simple interface
Drawbacks
To ensure fast compression, solid and stable Wi-Fi is required.
Unable to select compression level. The document will be compressed based on the PDF24 Tools compression algorithm.
Which Method Should I Choose
If you like to work on the go and compress PDFs wherever you are, mobile apps will be your best method. Out of the three apps shared above, Smallpdf is recommended as it is free and offers fast compression. If you only have one or two PDF documents to compress at one time, PDF Compressor can do the job well.
For the best compression quality, PDFelement and Adobe Acrobat Reader: Edit PDF will be recommended, especially for those who compress PDF documents regularly. They are the top PDF editor apps on the iPhone and offer one of the fastest compression speeds and best compression qualities.
For online methods, iLovePDF will be recommended as it allows users to select the desired compression level and offers many other PDF tools for editing as well. It has a user-friendly interface and possesses a relatively fast compression speed.
Why You Need To Reduce PDFs On iPhone
In this face-paced society, people often like to work on the go and send documents fast and effectively. The ability to reduce PDF size on your iPhone will help when your documents are too big to be sent via email. This saves time and allows flexibility for people to work on the go.
Conclusion
Compressing PDF documents does not need to be complicated. Start with in-built features and mobile apps if you are looking for a fast, free, and convenient PDF compression tool on the iPhone. These methods are quick, and you can get your compressed PDF documents in seconds.
PDFelement and Adobe Acrobat are recommended for users who compress documents regularly and seek high-quality documents. Alternatively, Smallpdf and PDF Compressor are excellent apps that get the job done as well. If online methods are what you are looking for, iLovePDF and PDF24 Tools will be able to compress your PDF documents in no time.