Compress PDF Online Free

Use this free PDF compressor to reduce the file size of a PDF while keeping pages clear and readable. Upload a PDF, choose a compression level, and download a smaller copy for email, uploads, assignments, invoices, reports, or online forms.

Large PDF files can be difficult to email, upload, or share. This tool helps make PDFs smaller without requiring software installation or account registration.

How to compress a PDF

Upload or drag in a PDF file.
Choose a compression level: Light, Balanced, or Strong.
Review the estimated output size.
Select Compress PDF.
Download the smaller PDF file.

The original PDF stays unchanged. The tool creates a new compressed copy for you to save and share.

Choose the right PDF compression level

Light compression

Choose Light compression when document clarity is your priority. It is useful for printed reports, portfolios, documents with fine details, and scans with small text.

This option usually creates a larger file than the other modes, but it is designed to preserve more visual detail.

Balanced compression

Balanced compression is a practical choice for everyday sharing. It reduces file size while keeping most text and images clear enough for email, school submissions, reports, invoices, and standard business documents.

For most users, Balanced compression offers the best mix of readable quality and a smaller file size.

Strong compression

Choose Strong compression when you need the smallest possible PDF for a strict upload or email attachment limit. It is useful for scanned documents that are too large to send.

Because Strong compression reduces image quality more aggressively, always review the final PDF before submitting or sharing it.

Why make a PDF smaller?

Compressing a PDF can make it easier to:

Email documents with attachment limits
Upload assignments and application forms
Share invoices, receipts, and reports
Send scanned documents to clients or colleagues
Save space on your device
Upload documents to portals with file-size restrictions

Does PDF compression reduce quality?

Compression can reduce image detail, especially in scanned PDFs and documents containing photographs. The amount depends on the compression level you select.

Use Light compression when visual quality matters most. Use Balanced compression for everyday documents. Use Strong compression only when reducing the file size is more important than preserving every visual detail.

After downloading the compressed PDF, check small text, dates, figures, signatures, and images before sharing it.

Compress scanned PDFs for email

Scanned PDFs are often much larger than needed because each page is saved as a high-resolution image. Compressing these files can make them easier to email or upload.

For invoices, forms, assignment scans, and records, start with Balanced compression. If the file is still too large, try Strong compression and confirm that the important content remains readable.

Is this PDF compressor private?

This PDF compressor processes your document locally in your browser. The PDF does not need to be uploaded to a server by the tool, and the document leaves the current browser session when you clear it or close the page.

Only process documents you are authorized to handle. For sensitive legal, financial, medical, business, or personal files, review your organization’s document-handling rules before sharing the compressed copy.

Important output note

To reduce file size in a browser, the tool creates a new compressed PDF from the visible pages. This preserves the page appearance for reading and printing, but advanced PDF features may not be retained.

Interactive form fields, selectable text, annotations, embedded links, attachments, and some metadata may not appear in the compressed file. Review the final PDF before using it for an important submission or record.

PDF compression FAQs

Can I compress a PDF for free?

Yes. Upload the PDF, choose a compression level, and download the smaller version without registration.

Will the original PDF be changed?

No. The tool creates a new compressed copy. Your original file stays unchanged.

Which compression level should I use?

Use Light for maximum clarity, Balanced for everyday sharing, and Strong for strict file-size limits.

Can I compress a PDF for email?

Yes. Compressing a PDF can make it easier to meet email attachment limits. Start with Balanced compression for a good balance of size and readability.

Should I check the compressed PDF before uploading it?

Yes. Always inspect important pages, text, images, signatures, dates, and amounts before submitting or sharing the file.

Compress a PDF Online Free

Drop a PDF here