Best App for Shrinking PDFs in 2026: 9 Apps Compared

Smallpdf is the easiest compressor for most people. Drop a PDF onto the web tool or open it in the mobile app, choose basic or strong compression, and download the result. The interface explains the trade-off plainly, and the wider toolset covers merging, splitting, converting, and signing, so you are not installing a one-trick app.

The free tier limits how many tasks you can run each day, and very large files need the paid plan. Files are also uploaded to Smallpdf servers for processing, with deletion after a stated period, so sensitive documents deserve a local tool instead. For everyday email attachments and uploads, Smallpdf is fast, clear, and hard to get wrong.

iLovePDF pairs a clean web compressor with strong mobile apps, which makes it a good pick for people who shrink PDFs on a phone. You can choose a compression level, see the resulting size, and then use the same app to merge, split, convert, or sign the file. The workflow feels coherent rather than a set of disconnected web pages.

Free use has file size and task limits, and unlimited use needs the premium plan. As with Smallpdf, files are uploaded for processing, so read the deletion policy before using it for private material. For frequent mobile use, iLovePDF is one of the most polished options here.

Adobe Acrobat is the workhorse choice when a PDF has to look right after compression. The desktop app offers detailed optimisation controls, including image downsampling and font handling, while the online compressor covers quick one-off jobs. Results are predictable, which matters for client documents, portfolios, and forms that will be printed or archived.

The cost is the main barrier. Full Acrobat needs a subscription, and it is heavier than a simple web tool if you only shrink one file a month. For occasional use, the free online tool may be enough. For regular work documents, Acrobat is worth the price for reliability alone.

PDF24 Tools is a strong free option that does not push you to create an account for basic compression. Upload a PDF, compress it, and download the result, with a wider set of PDF tools available on the same site. A desktop app is also offered for people who prefer to process files locally.

The interface is plainer than Smallpdf or iLovePDF, and quality previews are less detailed. Very large files may work better in the desktop app than in the browser. For a free, no-fuss compressor that you use a few times a month, PDF24 is easy to recommend.

Sejda is a good choice for a one-off job when you do not want to sign up. The web compressor offers clear options, processes the file, and deletes it after a stated period. That no-account flow is useful for a single large attachment or a form that needs to fit an upload limit.

The free tier limits the number of tasks per hour and the size of each file, so batch work quickly needs the paid plan. It is also web based for free use, with desktop options behind paid plans. For occasional, private-minded web compression, Sejda is a solid pick.

PDFelement, from Wondershare, suits people who already edit PDFs on a computer and want compression in the same app. You can compress a file, adjust image quality, edit text, add signatures, and batch process several files without uploading them to a web service. Local processing is a real advantage for work documents.

The full version needs a paid plan, and the desktop app is heavier than a web tool. The range of features also takes a little learning if you only want compression. For regular desktop PDF work, PDFelement is a practical all-in-one choice.

Foxit PDF Editor is a desktop alternative to Acrobat that many teams use for editing, reviewing, and securing PDFs. Compression sits alongside editing, commenting, form filling, and security tools, so a team can standardise on one app for most PDF work. Results are reliable, and local processing keeps files off third-party servers.

Casual users will find it more than they need, and pricing varies by edition, so check the current plan page for the version that includes the features you want. For business users who shrink PDFs as part of wider document work, Foxit is a strong, well-supported option.

PDF2Go is a straightforward web compressor for people who do not want to install anything. Upload a file, choose compression settings, and download the smaller result, with other PDF tools available if you need to merge or convert the file first. The workflow is quick and the site is easy to follow.

Free use has limits, and files are uploaded for processing, so it is not the best choice for sensitive documents. Mobile features are also lighter than a dedicated app such as iLovePDF. For a fast desktop browser job, PDF2Go does the work with little fuss.

Stirling PDF is different from the other tools here, because you run it yourself on your own server or computer rather than using someone else's website. That local processing is a major advantage for private documents, since files never need to leave your own system. Compression sits alongside merging, splitting, converting, signing, and many other PDF tools in one web interface.

The cost is setup. Stirling PDF needs Docker or a similar deployment, and it suits technical users, small teams with IT help, or privacy-minded users who already run self-hosted tools. There is no simple consumer phone app in the same sense as iLovePDF. For a team that shrinks PDFs often and wants full control over file handling, it is a strong and genuinely free option.