What is compress pdf?
PDF compression reduces the storage size of a document by optimizing internal objects and, when possible, recompressing embedded images. Image-heavy reports, scans, brochures, and presentation exports often have more room to shrink than text-only files that are already optimized.
How to use Compress PDF
- 1
Choose the PDF you want to reduce.
- 2
Select Light, Balanced, or Strong compression.
- 3
Start processing and keep the tab open while the file is uploaded and optimized.
- 4
Download the new compressed PDF and review it before replacing your original.
Why use this tool?
A smaller PDF can be easier to email, upload to application portals, share over slower connections, and keep within document-size limits. PDFora creates a new output file so your original remains unchanged on your device.
How PDFora works
PDFora validates the selected files and options, processes the task locally inside your browser, and creates the download on your device. Document contents are not sent to PDFora servers.
Common ways to use Compress PDF
- Email attachments that exceed mailbox limits
- Application or document portals with file-size limits
- Image-heavy scanned records and reports
- Archiving copies that do not need maximum image resolution
Tips for better results
- Use Balanced first for a practical size-quality tradeoff.
- Try Strong for scanned or image-heavy PDFs when a smaller file matters more than image detail.
- If the result is nearly the same size, the original PDF may already be efficiently compressed.
- Always check small text, diagrams, and images in the downloaded copy before important submission.
Frequently asked questions
Will PDF compression change my original file?
No. PDFora generates a separate result and does not modify the original file stored on your device.
Why did my PDF shrink only a little?
Some PDFs are already optimized or contain mostly text and vector graphics. Compression savings depend on the file's internal structure and images.
What is the upload limit?
The current limit is 50 MB per uploaded file.
Are password-protected PDFs supported?
Password-protected PDFs are rejected in this version because the service does not ask for or store PDF passwords.