Compress via iLovePDF

Open ilovepdf.com in a browser on your phone or computer, then choose "Compress PDF". Tap "Select PDF Files", pick the file to shrink, and wait for the upload.

Choose your compression level — "Recommended" balances size and quality, while "Extreme" produces the smallest file with lower image quality. Click "Compress PDF", wait for the process to finish, then download the result.

Alternatives: Smallpdf and Other Sites

Smallpdf (smallpdf.com) works almost identically: choose "Compress PDF", upload via the "Choose Files" button or drag the file onto the page, wait, then download. Other sites like PDF2Go, PDFBear, and PDFCandy are worth trying as backups.

All these services run in the browser, so they work on Windows, macOS, Android, and iOS with no install. Make sure your internet connection is stable so the upload doesn't fail halfway.

Some sites also support batch compression of multiple files at once, handy for tasks involving dozens of documents. Downloads are usually named like the original plus a "compressed" suffix so they're easy to tell apart.

When You Need to Compress a PDF

PDF compression is most often needed when uploading documents to official sites with file-size limits — such as civil-service registration, scholarships, or admin services — and when sending email attachments that reject oversized files.

Smaller files also upload, download, and open faster on phones with limited storage. As a benchmark, iLovePDF's "Recommended" level cut a file's size by about 50 percent in one test.

Many email services cap attachments at 25 MB, so oversized PDFs often fail to send. Compressing before sending ensures the file reaches the recipient without having to split it into several inconvenient parts.

Security Notes

Because files are uploaded to third-party servers, avoid compressing highly sensitive documents — such as ones containing banking data or important IDs — through online services. For those, use offline apps like Adobe Acrobat or built-in OS features.

If you still use an online service, pick a trustworthy provider and read its privacy policy; good services delete user files from their servers a few hours after processing.