Compress PDF Online
Reduce PDF file size for email attachments, upload limits, and storage. No signup, no watermark, processed in your browser.
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.pdf — up to 10MBThis compress pdf helps you reduce PDF file size for email attachments, upload limits, and storage. It supports PDF files with text, images, and scanned pages and is ideal for reduce a pdf to fit an email attachment limit, compress a scanned document before uploading it and make pdf files smaller for storage and faster sharing.
Unlike other tools, ConvertWiki focuses on speed, simplicity, and privacy. Your files are processed quickly and are not stored on any server.
You can use this tool for:
- Reduce a PDF to fit an email attachment limit
- Compress a scanned document before uploading it
- Make PDF files smaller for storage and faster sharing
How to use this tool:
- Upload the PDF file you want to reduce.
- The tool compresses image-heavy pages where possible.
- Download the smaller PDF directly from the page.
Why use ConvertWiki?
How PDF compression works
PDF files grow large mainly because of embedded images. This compressor re-compresses the images inside the PDF at a reduced quality, which is usually unnoticeable on screen but dramatically reduces file size.
Text, fonts, and vector content are not affected by image compression. PDFs that consist mainly of text will see smaller reductions than image-heavy documents.
When to compress a PDF
- Reduce a PDF to fit an email attachment limit.
- Compress a scanned document before uploading it.
- Make PDF files smaller for storage and faster sharing.
Frequently Asked Questions
Yes. Text and fonts are not modified during compression — only embedded images are re-compressed.
Image-heavy PDFs can shrink by 50–80%. Text-only PDFs may see less reduction.
Up to 10MB per file.
Yes, it is completely free with no signup required.