Compress PDF on iPhone
Compress PDF on your iPhone straight from Safari — no App Store download, no in-app purchase, and no account. ContinuePDF works with the iOS Files app and iCloud Drive, so you can compress your PDF whether it's saved on your phone, in iCloud, or attached to an email. You can even add the tool to your Home Screen so it opens like a regular app.
Start Compress PDF NowHow to Compress PDF on iPhone
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1
Open ContinuePDF in Safari
On your iPhone, open Compress PDF in Safari. Tap the Share icon then "Add to Home Screen" if you want app-like access.
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Pick a file from Files or iCloud
Tap to add your PDF and choose from the Files app, iCloud Drive, Photos, or a recent attachment.
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3
Save back to Files
Run the tool and tap download — compressed PDF is saved into the Files app (usually under Downloads).
What you can do with Compress PDF
Compressing rewrites a PDF so it takes up less space — mainly by optimising embedded images and stripping redundant data — making the file easier to email, upload, or store.
Get under an email limit
Shrink a photo-heavy PDF so it fits within a 10 MB or 25 MB attachment cap.
Speed up a web upload
Reduce a large scan before submitting it to a government portal, job application, or loan form that rejects big files.
Save storage space
Compress archived documents so a folder of scans takes a fraction of the disk or cloud space.
Share faster
Send a lighter file that downloads quickly for recipients on slow or mobile connections.
Compress PDF on iPhone without an app
Most iPhone PDF apps want an App Store download, then gate the useful features behind a subscription or a one-time purchase — a lot of overhead just to compress a single document. And each app is one more thing taking up space and asking for permissions.
ContinuePDF runs in Safari instead, so there is nothing to install. It plugs into iOS the way you'd expect: pull your PDF from the Files app, iCloud Drive, or Photos, compress it, and save compressed PDF straight back to Files. Everything happens on the phone — your document is never uploaded — and adding the page to your Home Screen gives you a one-tap "app" without the App Store.
Why choose ContinuePDF
No App Store
Runs in Safari — no download and no in-app purchases.
Files & iCloud
Pull files from the Files app, iCloud Drive, or Photos.
Add to Home Screen
Save it as a Home Screen icon for one-tap, app-like access.
Stays on your iPhone
Documents are processed on-device and never uploaded.
Pro tip
Most of a PDF's size usually comes from scanned pages and embedded photos, not text. If a file is still too big after compressing, check whether it is a scan — reducing image resolution has the biggest effect, while a text-only PDF is already small.
Frequently asked questions
Will compressing make my PDF look worse?
At a moderate level, text and vector graphics stay sharp and the savings come from optimising images, so documents still look clean. The strongest setting works harder — it can even convert pages to images to shrink the file further, which softens photos and makes text non-selectable — so choose a moderate level when you need to keep text crisp and selectable.
Why didn't my PDF get much smaller?
If the file is mostly selectable text, it is already efficient and there is little to remove. The biggest savings come from PDFs built around high-resolution images or scans.
Is there a Compress PDF app for iPhone?
You don't need one. Compress PDF runs in Safari on your iPhone. Add your PDF from the Files app, iCloud Drive, or Photos, and save compressed PDF back to Files — no App Store download required. You can add it to your Home Screen for app-like access.
Where does the file save on my iPhone?
After processing, tap download and compressed PDF is saved into the iOS Files app, typically in the Downloads folder. From there you can move it to iCloud Drive or share it to any app.
Is ContinuePDF free to use?
Yes. ContinuePDF and all of its tools, including Compress PDF, are free with no signup required. Because documents are processed in your browser rather than on our servers, we can offer the full feature set at no cost.
Other ways to Compress PDF
Prefer a different device, browser, or setup? Compress PDF works the same everywhere.
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