Free browser-based PDF size reducer
PDF Compressor
Reduce PDF file size for email, WhatsApp, online forms, visa portals, job applications, school uploads and business sharing. Choose safe optimization or stronger image compression for scanned PDFs.
Upload PDF
Choose one PDF file to compress.
Free PDF compressor to reduce PDF file size online
This PDF compressor helps reduce PDF file size for email attachments, WhatsApp sharing, school uploads, job applications, visa portals, online forms and business document submission. Large PDF files are often rejected by websites because they exceed upload limits. Compressing the PDF can make it easier to send, upload, archive and store.
Compress scanned PDF files
Scanned PDFs are usually large because each page is stored as an image. Image compression can reduce these files significantly by lowering image quality and resolution.
Reduce PDF size for email
Many email providers limit attachment size. Compressing PDFs helps you send reports, receipts, invoices and forms more easily.
Optimize PDF for online upload
Government portals, school portals, job sites and application forms often require smaller files. This tool helps create upload-friendly PDF documents.
Quality and scale control
Adjust quality and render scale to balance size and readability. Higher quality keeps documents sharper while lower quality creates smaller files.
Safe optimize mode
Safe Optimize re-saves the PDF structure and may reduce some overhead without converting pages into images.
Private PDF compression
Your file is processed locally inside your browser. This helps protect sensitive documents such as IDs, invoices, certificates and business records.
How to compress a PDF
- Upload one PDF file.
- Choose Image Compression for scanned PDFs or Safe Optimize for text PDFs.
- Adjust quality and scale if using image compression.
- Click Compress PDF.
- Compare original and compressed size, then download the smaller PDF.
Why some PDFs do not compress much
Some PDFs are already optimized by professional software, so the file size may not reduce much. Text-heavy PDFs can already be very small. Scanned/image-heavy PDFs usually compress better because the images inside the document can be reduced in quality or resolution.
PDF Compressor FAQ
Can I reduce PDF size for email?
Yes. Upload the PDF, compress it, and download a smaller version for email or messaging.
Which mode should I use?
Use Image Compression for scanned PDFs. Use Safe Optimize for text/vector PDFs.
Will text stay selectable?
Safe Optimize usually preserves text. Image Compression rasterizes pages, so text may no longer be selectable.
Are my PDFs uploaded?
No. The compression process runs locally in your browser.
Why did the file become larger?
Some already-optimized PDFs may not compress further. Try Safe Optimize or adjust quality/scale settings.
Can I compress password-protected PDFs?
Locked or encrypted PDFs may need to be unlocked before this tool can process them.