Best FREE PDF Compression Tool in 2026
Is your PDF too large to upload, send, or attach? In this quick tutorial, you’ll learn how to compress a PDF online using OnlyDoc — open the PDF compressor, upload your file, wait for automatic compression, and download a smaller PDF that is easier to share.
👉 Compress PDF now: https://onlydoc.com/compress-pdf
In this video, we show what happens when a PDF file is too large for a regular upload and how to fix it with the OnlyDoc Compress PDF tool. Instead of trying to upload the same oversized document again, you can reduce the file size directly in your browser and get a lighter PDF in just a few steps.
Step-by-step guide: go to OnlyDoc, open the “All Tools” menu, choose “Compress PDF,” and upload your document. You can drag and drop your PDF into the upload area or click “Choose file.” Once the file is uploaded, OnlyDoc starts processing it automatically. After compression is complete, download the optimized PDF and use it for email, forms, websites, document sharing, or storage.
Why compress a PDF:
Large PDF files can be difficult to upload, email, or share. Some websites, online forms, messengers, and email services have file size limits, so reducing your PDF size can help you avoid upload errors and send documents faster. PDF compression is especially useful when working with scanned files, reports, presentations, contracts, manuals, invoices, portfolios, or documents with many images.
Common use cases:
Reduce PDF size before uploading it to a website
Compress a PDF for email attachments
Make scanned documents easier to send
Prepare files for online forms with upload limits
Save storage space on your computer or cloud drive
Share contracts, reports, manuals, or presentations faster
Fix “file too large” errors when submitting documents online
Why use OnlyDoc:
Simple online PDF compression
Works directly in your browser
No extra software installation needed
Drag-and-drop PDF upload
Automatic file processing
Useful when a PDF is too large to upload or send
Helps make PDF files easier to share, store, and manage
Helpful link:
🔗 Compress PDF: https://onlydoc.com/compress-pdf
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