Top Free PDF Compressors of 2024—A Definitive Guide


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The ever-growing digital realm demands efficient data handling and storage, and PDFs are no exception. Large PDF files can be cumbersome, often slowing down sharing and uploading processes. But fret not! Compressing PDFs is simpler than you think. In this article, we’ll explore some common questions about PDF compression and introduce you to the best tools available. Stay with us till the end for some enlightening insights.

Part 1. The Basics of PDF Compression

So before we delve into the best software for PDF file compression, let’s discuss some common concerns with PDF compression.

Can I reduce a PDF’s size by 50% or more?

Yes, based on your PDF’s initial content and size, you can potentially reduce its size by over 50%. Especially for PDFs containing high-res visuals, a noticeable size reduction can be accomplished without majorly impacting the quality.

Is it possible to control the output quality when compressing PDF files?

Absolutely! Many compression tools, including UPDF, offer varying levels of output quality. With UPDF, you can determine the balance between compression and quality, ensuring your PDFs remain sharp while becoming lightweight.

Can I compress an already compressed PDF?

Technically, yes. However, compressing an already compressed PDF may not yield a significant reduction. Moreover, compressing repeatedly can degrade the quality of images and graphics within the PDF.

By understanding these fundamental aspects of PDF compression, you’re well on your way to mastering the art of efficient PDF handling. Stay tuned as we delve deeper into the best free online PDF compressors in upcoming sections.

Part 2. The Best PDF Compressors from Our List

Navigating the digital landscape today, we encounter many tools, each promising efficiency and reliability in handling PDF tasks. But with so many options available, how do we determine which tool stands out? Which one offers a blend of usability and functionality that caters to both novices and experts alike? As we sift through our curated list of PDF compressors, one name consistently rises to the top: “UPDF.”

UPDF emerges as the beacon for all PDF compression needs in today’s wide variety of digital tools. Wondering what sets UPDF apart from its competitors? Let’s delve deep into the reasons that make it a standout.

Top Free PDF Compressors of 2024—A Definitive Guide

Reasons Why UPDF is the Best PDF Compressor

Cross-Platform Functionality: Whether you’re on Windows, Mac, iOS, or Android, UPDF is there for you. One tool, every device.

Secure Compression: UPDF guarantees your files remain confidential during compression, prioritizing user data protection.

User Control Over Output Quality: UPDF lets users select the preferred output grade, achieving a perfect equilibrium between document dimensions and sharpness.

Cloud Integration: Once you register a UPDF account, easily store and access your compressed files across devices via the cloud.

More Than Just Compression: UPDF isn’t a one-trick pony. It offers PDF editing, conversion, and more, all within the same interface.

User-Friendly Interface: Jump right in without fearing a complex interface. UPDF is user-friendly, ensuring PDF compression is simple for individuals across all tech backgrounds

Optimized for Speed: Time is of the essence. UPDF compresses your PDFs rapidly, ensuring you don’t miss out on pressing deadlines.

Quality Maintenance: UPDF guarantees that the excellence of PDF visuals, content, and illustrations remains intact post-compression.

Considering all these stellar features, it’s evident that UPDF is more than just a PDF compressor; it’s a holistic solution designed to make your digital life simpler and

more efficient. Dive in and experience the UPDF difference!

Part 3: What Are Some Other PDF Compressors Of 2023

The Internet is a whole of PDF compressors, each bringing flair to the table. While UPDF is special in our recommendations, others shouldn’t be overlooked. From cloud-based platforms to the most intuitive interfaces, these four tools can be your go-to tool for compressing PDFs. Let’s further discuss each of them below.

1. Smallpdf

Smallpdf is not just a compressor; it’s a holistic online solution tailored to handle various PDF-related tasks. Its browser-based functionality means it’s universally accessible, making it a favorite for those who work across different devices or platforms.

Limitations: With its online nature, Smallpdf can sometimes be limited by your internet bandwidth. And while the Pro version promises unlimited tasks, the free version might leave you waiting if you’re processing large batches of files.

Pros & Cons:


  • User-centric design
  • Comprehensive PDF toolset beyond just compression
  • High-level security measures


  • Files are briefly hosted on their platform, which may pose data privacy questions.
  • Large batch tasks can be time-consuming in the free version.
  • Reliant on the steadiness and speed of your internet connection.
  • Limited operations per hour in the free version.
  • Batch processing is only available for the Pro users.

2. PDF Compressor by Tu Phan

For Apple users, this iOS-centric app blends effortlessly with the device’s ecosystem. Its sleek interface and touch-optimized controls make compressing PDFs feel like a native iPhone experience.

Limitations: Despite its elegance, the free version can sometimes be disrupted by ads. Additionally, users might miss out on some advanced functionalities without an upgrade.

Pros & Cons:


  • Seamless iOS experience
  • Swift compression mechanics


  • Interruptive ads in the free version.
  • Missing advanced features unless upgraded.
  • Limited file size for compression in the free version.
  • The app might consume more storage on the device due to cached files.

3. Compress PDF File by SmartApps38

Android users, rejoice! This tool integrates deeply with Android, offering widget-like functionalities and an interface that feels like an extension of the operating system.

Limitations: Some users have noted that the app doesn’t always play nicely with all Android versions, which can lead to occasional hiccups. The presence of ads might also deter the user experience in the free variant.

Pros & Cons:


  • Intuitive design tailored for Android
  • Effective compression without quality loss


  • Ads can be a tad intrusive.
  • Compatibility issues across different Android versions.
  • Compressed files are sometimes saved in obscure folders, making them hard to locate.
  • Lack of batch processing features.

4. Preview

A long-standing staple for Mac users, Preview offers more than just PDF viewing. Its integration as a default app ensures that Mac users always have a compression tool at their fingertips without scouting the App Store.

Limitations: Although handy, Preview doesn’t match up to the feature richness of dedicated compressors. Also, the lack of customization options during compression might not sit well with those looking for precise outcomes.

Pros & Cons:


  • Zero installation; it’s preloaded on every Mac
  • Versatility with other PDF editing tools


  • Compression capabilities aren’t exhaustive.
  • Absence of fine-tuned compression settings.
  • Limited to the Mac ecosystem; no cross-platform capabilities.
  • Lacks advanced PDF editing features compared to specialized PDF editors.
Top Free PDF Compressors of 2024—A Definitive Guide

Part 4: Comparing Top PDF Compressors: A Quick Guide

Did the above list of the best PDF compressors confuse you? Do you feel like Navigating the maze of PDF compressors? Here, we’ve compared five leading tools to provide a clear snapshot. Let’s dive in to discern the differences and help you make an informed choice.

FeatureSmallPDFCompressor (TuPhan)Compress PDF File (SmartApps38)           Preview           UPDF
Ratings (out of 5)
Compression Quality           HighMediumHighMedium           High
Multiple Output Options××
Compatible OSAlliOSAndroidmacOSWindows, macOS, iOS, Android
Free Version Available
Batch Processing in the Free Version          ××××
Ease of Use  HighMediumHighHighHigh
Customer SupportLimitedLimited×
Privacy & Security         High    MediumMediumHighHigh
Online/OfflineOnlineOfflineOfflineOffline  Offline  

So there you have it: a compression table of the best PDF compressions. Although each of the above tools has merits, UPDF’s comprehensive suite of features makes it a standout choice. For dependable quality and seamless usability, it’s hard to overlook what UPDF brings.


Compressing a PDF doesn’t mean compromising its content. With the right tools and knowledge, you can balance size and quality. Whether you’re sending that important presentation or sharing a portfolio, ensure your PDFs are in the optimal size without losing their essence. Try UPDF for a tailored compression experience today!

Jennifer Wilson
Jennifer Wilson
She knows business processes and operations management inside out. As she understands all the challenges of running a small business firsthand, it’s her mission to tackle the topics that are most relevant to entrepreneurs and offer viable solutions.


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