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Free PDF tool

Compress PDF

Reduce your PDF file size online without losing quality. Upload your file at the top to compress it in seconds, then read the guidance below.

Working field

Drop a PDF or click to upload it.

PDF Upload

Drag & drop a PDF here or click to upload

Accepted file type: PDF only

Result

Your compression status and download appear here.

Your compressed PDF will show here once you upload a file and start compression.

This compressor is best for shrinking PDFs for email and uploads while keeping them readable.

Compress PDF Online — Reduce File Size Without Losing Quality

Shrink large PDFs into smaller, easy-to-share files in seconds. This tool keeps the workflow simple: upload first, supporting content below, and the sidebar on the left for popular and related tools.

Smaller file sizes

Reduce heavy PDFs so they fit upload limits and send easily by email.

Quality preserved

Smart compression keeps text crisp and images clear while cutting size.

Works everywhere

Use it on Windows, Mac, iOS, Android, and tablets in any modern browser.

No setup required

Drag, drop, and compress directly in the browser — no installs.

How it works

  1. Drag and drop your PDF into the upload zone above, or click to browse.
  2. Click Compress PDF to optimize images, fonts, and metadata.
  3. Wait a moment while the file is compressed and prepared.
  4. Download the smaller PDF, or reset the form and compress another file.

Best practices

  • Upload a valid PDF file for reliable compression.
  • Unlock password-protected PDFs before compressing.
  • Merge related files first, then compress the combined PDF.
  • Keep the original if you may need full quality later.
  • Check the result preview before you download.
  • Compress scanned documents to make them email-friendly.

Frequently asked questions

Is this PDF compressor really free?

Yes. The tool is 100% free with no hidden charges or watermark restrictions, and you can compress as many files as you like.

Will my file quality be reduced?

We use smart compression that keeps text clear and images sharp while shrinking the file size, so your PDF stays easy to read.

Can I compress password-protected PDFs?

If your file is locked, run it through the Unlock PDF tool first to remove the password, then come back here to compress it.

How do I compress multiple PDFs at once?

The easiest way is to use the Merge PDF tool to combine your documents into one file, then compress that single file here.

What file types can I upload?

This tool accepts PDF files only. Drag and drop a PDF or click the upload zone to browse for one.

Is my document safe?

Your file is sent securely for compression and is not stored long-term, so your personal, legal, or academic PDFs stay private.

For related PDF work, try the Unlock PDF tool to remove restrictions, or the Merge PDF tool to combine files before compressing.