Compress PDF Online

About the Compress PDF Tool

This free PDF compressor reduces your file size directly in your browser — no uploads, no sign‑ups, and no quality loss. Choose from three compression levels: Maximum (smallest file), Balanced (a mix of size and quality), or High Quality (best visual fidelity). The optimized PDF is ready in seconds and your original stays untouched.

How to Compress a PDF

1. Upload your PDF – Drag your file into the upload zone, or click Browse. Files up to 50 MB are supported.
2. Choose a compression level – Select Maximum, Balanced, or High Quality based on your needs.
3. Compress and download – Click "Compress PDF". You'll see the original size, the compressed size, and a percentage reduction badge. Click "Download Compressed PDF" to save the smaller file.

Pro tip: Client‑side compression typically reduces PDFs by 15–25%. Text‑heavy documents compress best. If your PDF is already well‑optimized, you may see only a small reduction — that's normal. For maximum size savings, choose the "Maximum" level and consider splitting very large files first.