Compress PDF online for free

Compress your PDF files Conversion is available on the free plan within its daily usage quota.

Accepted source formats

PDF

Available output formats

PDF

How it works

Drag and drop your PDF or click to select

Choose your desired compression level

Download your compressed PDF

Common mistakes

Using a source file of poor quality.
Publishing without checking the final result.
Confusing file size, dimensions and quality.
Overwriting the original file without keeping a copy.

Pro tips

Always keep an original version.
Test several settings before downloading.
Use WebP for the web when possible.
Choose descriptive file names for SEO.

Privacy and file handling

File handling depends on the selected tool and format. For sensitive files, review the tool information before starting the operation.

Compress PDF without visible quality loss

Lossless or lossy compression depending on the chosen ratio. Always check the output file before sharing it. A quick check can prevent problems later. Finally, test the file in the app or service where it will be used and keep the original until the finished version has been fully reviewed.

PDF compression for email and attachments

Email services often impose a 10-25 MB limit per attachment. With our tool, reduce large PDFs to send them via Gmail, Outlook, Yahoo or any other email service. No need for external transfer services for your important documents. A quick check can prevent problems later. Always check the output file before sharing it.

Compress PDF for free without signup

No daily limits, no watermarks added. Keep the original until you have approved the result. Always check the output file before sharing it. Before running the tool, check the source file and define the result you actually need so that you only change settings that matter for the final use.

Fast online PDF compression

Finally, test the file in the app or service where it will be used and keep the original until the finished version has been fully reviewed. Before running the tool, check the source file and define the result you actually need so that you only change settings that matter for the final use.

Optimize PDF for web and social media

Lighten your PDFs for faster loading on your website, blog or sharing platform. An optimized PDF improves user experience and page SEO. Always check the output file before sharing it. The final format should match how you plan to use it. Keep the original until you have approved the result.

Discover all our PDF tools

Compress, merge, convert, edit and protect your documents in a few clicks.

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Guides and tutorials

Learn how to use our tools with our detailed guides.

Blog — Convert PDF

Frequently asked questions

Compression preserves text readability and images. You can choose between high, medium, or low quality.

Yes, form fields, annotations, and links are preserved after compression.

Click the drop zone or drag and drop your PDF file (.pdf extension). Encoding to the PDF format starts automatically — no software to install. Then download your transformed file.

Conversion is available on the free plan within its daily usage quota. Current quotas and higher plans are shown on the Pricing page.

The practical file-size limit depends on the format, browser and memory available on your device. If a file fails, try a smaller version or split it when the tool supports that workflow.