Compress PDF Online
Reduce your PDF file size for email attachments, portal uploads, and cloud storage. No server upload — all processing happens in your browser.
PDF compression tool
Compress PDF in your browser
Try basic PDF optimization for upload and sharing. It works best for PDFs that can be rebuilt more efficiently.
Upload PDF
Choose a PDF from your device. Large files can take longer.
Upload PDF to optimize
Your PDF stays on your device.
Upload a PDF to try browser-side optimization. No file is uploaded to our server.
File details
Compare original and output size after optimization.
No PDF selected
Upload a PDF to see file details and compression result.
What this tool does
Upload a PDF and the tool compresses it by optimising embedded images, removing redundant metadata, and re-encoding where possible. The compressed PDF is downloaded directly to your device. Your file is never uploaded to any external server.
When to use it
Use this when a portal rejects your PDF for being too large, when sending a document via email that has a size limit, or when you need to save storage space on a shared drive or cloud folder.
Frequently Asked Questions
How much can this tool reduce a PDF file size?
Compression results depend on the content of the PDF. Image-heavy PDFs often compress by 50–80%. Text-only PDFs with already optimised fonts compress less significantly.
Will compression affect the readability of my PDF?
For most document PDFs, compression has minimal visible impact on text quality. Image quality may reduce slightly, but the document remains fully readable and printable.
Is my PDF uploaded to a server?
No. PDF compression in this tool happens entirely in your browser. Your file is never sent to any server, stored, or shared.
What is the maximum file size I can compress?
The tool handles PDFs up to several hundred MB, depending on your device's memory. Very large PDFs may take longer to process on older devices.
Can I compress a password-protected PDF?
No. Password-protected PDFs cannot be processed by this tool. Remove the password protection first using another tool, then compress.