About the Compress PDF
Compress PDF online is a simple solution to reduce your PDF file size for email attachments and uploads. Government portals, job applications, and email attachments all enforce size limits, which can make it difficult to share large files.
Our PDF compressor re-renders each page and re-encodes its imagery at the quality you choose, typically cutting scanned or photo-heavy PDFs by 50–90%. Text-only PDFs that are already small will not shrink much.
Everything runs on your device with pdf.js and pdf-lib; your document is never uploaded. Try our free online tool today!
How to use the Compress PDF
- Step 1: Choose a PDF file to compress
- Step 2: Pick a compression level (Strong for scans, Balanced for mixed documents, Light for print quality)
- Step 3: Click Compress to start the process
- Step 4: Compare the before/after sizes and download your compressed PDF
Tips & benchmarks
- For forms that need to stay searchable, use Light compression — Strong converts pages to images.
- If you only need a few pages, split the PDF first to get even better results.
Frequently asked questions
Why did my PDF not get smaller?
Please ensure your browser and pdf.js are up-to-date. Also, check if the PDF file itself is corrupted or has incompatible formatting. Our tool works best with standard PDF files without embedded fonts or images.
Does compression keep the text selectable?
Yes, our PDF compressor preserves text selectability and hyperlinks for most formats. However, some image-heavy PDFs might have reduced text selection accuracy due to the conversion process.
Is there a size limit for compressed PDFs?
There is no explicit size limit for compressed PDFs generated by our tool. The optimized file size will depend on the original document's content and compression level chosen.
Can I use this tool for commercial purposes?
Yes, you can use our PDF compressor for commercial purposes without any restrictions. Our tool is designed to be a helpful resource for individuals and businesses alike.
Is my personal data secure when using the tool?
Absolutely! Your personal data remains confidential with us. We do not collect or store any sensitive information about you or your PDF files. Our service runs entirely on your device's browser, ensuring maximum security and data protection.
Can I use this tool with PDFs from specific sources (e.g., Adobe Acrobat)?
Our PDF compressor is compatible with most standard PDF formats, including those created by Adobe Acrobat. However, certain advanced features or proprietary formats might not be fully supported.
All tools on 24SevenUpdates are free to use for personal and commercial work. Calculations and file conversions are performed in your browser; the redirect and cache checkers make a single request to the URL you enter and store nothing. Found a bug or want a new tool? Tell us.