How to Compress PDF Online Free (15MB, 20MB+ Files)
Upload failed because your PDF is too large? Government portals, college forms, and email often limit PDF size to 5MB or 10MB. Here is how to compress a large PDF online — free, private, and without installing software.
Why PDFs Become Too Large
- Scanned documents saved as high-resolution images inside the PDF
- Multiple pages from phone camera scans
- Certificates and marksheets scanned at full quality
Compress PDF in 4 Steps
- Open PhotoBandhu Compress PDF.
- Upload your PDF (up to ~50MB).
- Choose preset: Balanced for normal use, Strong or Maximum for 15MB+ files.
- Optional: set target Under 5 MB or Under 10 MB, then download.
Which Preset to Use?
Balanced — Good quality, moderate shrink. Best for readable documents.
Strong / Maximum — Smallest file. Best when portal rejects your upload.
Still Too Large? Merge First
If you combined files with Merge PDF, compress after merging. Large textbooks may take 1–3 minutes on phone — keep the tab open.
Privacy
Your PDF stays on your device. PhotoBandhu does not upload files to any server.
FAQ
How to compress PDF online free without uploading to server?
Use PhotoBandhu Compress PDF — files are processed in your browser and are not sent to our servers.
How to reduce 15MB PDF to 5MB?
Upload to Compress PDF, choose Strong or Maximum preset, optionally set Under 5 MB target, then download.
Will compressed PDF text remain readable?
Balanced preset keeps text clear for marksheets and certificates. Use Strong only when the portal strictly rejects file size.
Can I compress PDF on phone?
Yes — works in mobile Chrome. Large PDFs may take 1–3 minutes; keep the tab open.
Is PDF compression free on PhotoBandhu?
Yes — no account required.
PDF still too large after compress?
Try Split PDF first, remove blank pages, or scan documents at lower DPI before converting to PDF.