Compress PDF Files Online Without the Hassle
Need a smaller document for email, sharing, or storage? Use our browser-based PDF size reducer to create a more compact PDF with adjustable image quality. Your file is processed locally in your browser.
- Adjust image quality to balance size and clarity
- Process PDF pages locally in your browser
- Download your newly generated PDF
Your selected PDF is processed on your device, not uploaded to a DoMorely server by this tool.
Compress PDF
Make your document more compact
Lower quality and resolution may reduce file size more, but can make text and images less clear.
A Practical Way to Reduce PDF File Size
Large PDF documents can be inconvenient to email, share, or store. Compress PDF pages by adjusting image quality and rendering resolution to create a smaller, image-based document when suitable.
Adjustable Image Quality
Choose a quality level that suits your document and balance smaller output against visual clarity.
Simple Browser Workflow
Select a PDF, adjust the settings, process its pages, and download the resulting document from one interface.
Local File Processing
The tool processes the selected document in your browser. The PDF is not sent to a DoMorely upload endpoint by this code.
How to Compress a PDF Online
Create a more compact PDF in a few straightforward steps. For documents containing selectable text or interactive elements, keep your original file because image-based output changes how the document behaves.
Select your PDF
Choose a PDF from your device that is no larger than 50 MB.
Set quality and resolution
Lower settings can create smaller files, while higher settings preserve more visual detail.
Process and download
Generate the new PDF, compare the file sizes, and download the result if it meets your needs.
When Should You Reduce PDF Size?
A smaller PDF can be more convenient when you need to share image-heavy documents or work within a file-size limit.
Email Attachments
Make image-heavy documents more manageable before attaching them to an email. Check your provider's attachment limit first.
Online Applications
Prepare a smaller document for a submission portal when its file size limit allows image-based PDFs.
Everyday File Sharing
Reduce the storage footprint of some scanned or image-based documents before sharing them with others.
Before You Compress Your PDF
This tool renders each PDF page as an image and builds a new PDF. As a result, selectable text, text search, hyperlinks, form fields, signatures, bookmarks, and screen-reader accessibility may not be preserved. Fine text can become less readable at lower settings.
Compression is not guaranteed to reduce every file. The new PDF may be larger than the original, particularly if the original was already optimized. Compare both sizes before using the output.
Learn More About PDF Files
For additional guidance on PDF file optimization and document handling, read Adobe's guide to compressing PDF files. You can also learn about browser-based PDF rendering from Mozilla PDF.js documentation.
Compress PDF: Frequently Asked Questions
Helpful answers about file size, quality, privacy, and compatibility.
How can I compress a PDF file?
Select your PDF, choose image quality and resolution, and start processing. Download the new PDF and compare its size with the original. Results depend on the document's content.
Is this PDF compressor free to use?
This page's browser-based tool is designed to run without an account or payment. Your browser and device must support the processing required for your document.
Are my PDF files uploaded to a server?
The JavaScript in this page processes the selected file locally in your browser and does not send it to a DoMorely upload endpoint. Third-party scripts are loaded from their CDN addresses, so this statement does not mean the page has no external network requests.
Will the compressed PDF keep selectable text?
No. This implementation converts each page into an image. The generated PDF will generally not retain selectable or searchable text, hyperlinks, or interactive form fields.
Can the compressed PDF be larger than the original?
Yes. Some PDFs are already highly optimized or contain content that does not compress efficiently through page rendering. Compare the output size with the original before downloading.
Which image quality setting should I choose?
Start with Balanced for a practical compromise between file size and readability. Use Low for smaller output when detail is less important, or High when preserving page appearance matters more.