Meeting portal upload limits for scanned documents
Portals often enforce strict size limits. Compressing a scan can make the difference between repeated failures and a successful upload.
Compress PDF
Reduce PDF file size for email and upload limits without changing page order or creating a new page selection.
How to reduce PDF file size When a PDF is already correct but too large to send, compression is often the last step before upload. This tool focuses on file size reduction rather than page editing, merging, or splitting. It does a - effort PDF rewrite in your browser without installing anything. When possible, files stay on your device. Useful when: emailing PDFs, submitting forms with limits, or saving storage space
How to use
Upload the PDF, choose a compression level if available, and then verify readability on key pages after compression.
- Upload your PDF file by clicking or dragging
- Select compression level (low, medium, or high)
- Click 'Compress' to run the browser - side rewrite
- Download the smaller PDF if a reduction is found
Why this tool is useful
PDF uploads often fail due to size limits in email, portals, and document management systems. Scans and image - heavy PDFs are especially prone to large file sizes. When deadlines are tight, recreating the file is costly; compression is usually the fastest first step.
Compression is a practical way to reduce size while keeping the content readable for submission or sharing.
What this tool helps with
Reducing file size improves upload and delivery success. Smaller PDFs also reduce storage overhead and speed up sharing, especially on slower networks.
A careful review step matters: compression can affect image clarity, so verifying legibility and important details helps ensure the compressed file still fits the purpose.
Examples
Emailing a PDF without exceeding attachment limits
Email systems commonly reject large attachments. Compressing first reduces friction and avoids switching to alternative delivery methods at the last minute.
Recommended for
Recommended if you: - upload PDFs to portals with size limits - share scans and image - heavy documents - need faster delivery and smaller storage footprints - want a quick first step before recreating a file
Privacy and processing
Compression happens entirely in your browser. Your PDF is not uploaded to our servers.
Frequently Asked Questions
How much can I reduce my PDF size?
Results vary a lot by document. Browser - based PDF rewrites can help with some files, but scanned or image - heavy PDFs may shrink only a little.
Will compression reduce the quality?
This tool does not rasterize pages. It rewrites the PDF structure and keeps the smaller browser - generated result when possible.
Can I compress to a specific file size?
No. This tool does not offer a target - size guarantee. If you need a strict upload limit, split the PDF or compress the source images first.
Are my files safe and private?
Yes. Compression happens entirely in your browser. Your PDF is not uploaded to our servers.
What's the maximum file size I can compress?
The browser tool accepts PDFs up to 50MB. Very large files may still be slow depending on your device, so splitting first can help.
Is the compressed PDF watermarked?
No, we never add watermarks. Your compressed PDF looks exactly like the original, just smaller in file size.
Can I compress password - protected PDFs?
Not directly in this browser workflow. Unlock the PDF first, then compress the unlocked copy.
Does this work on mobile devices?
Yes, our PDF compressor works on all devices including iPhones, Android phones, and tablets. No app required.
Related Tools
Combine multiple PDF files into one document, with optional page ranges from each source file.
Split one PDF into separate files by page, range, or selection without changing the original document.
Turn PDF pages into JPG or PNG image files for previews, slides, chat, or design review.
Reduce image file size in your browser. Supports JPG, PNG, and WebP, and can try to meet a target KB size with - effort compression.