Compress PDF Online

Free

Reduce PDF size with Lossless clean, Balanced or Maximum quality, or auto-tune to a Target Size. Works on mobile; private by design.

Processing happens in your browser for Balanced/Maximum. No uploads. Lossless uses our server only to clean structure—no files are stored.

Drag & drop a PDF here, or

Select PDF

Tip: Use “By Target Size” to make a file email-safe (e.g., ≤ 5 MB). Balanced keeps color; Maximum uses grayscale for smallest files.

Less (clean only)

High quality, less compression

Balanced (Recommended)

Good quality, good compression

Maximum

Less quality, high compression

No file

How it works

Lossless keeps vectors and cleans internals. Balanced/Maximum convert pages to optimized images for big savings. Target Size chooses the best mix to meet your limit.

Frequently asked questions

What’s the difference between the levels?

Lossless cleans structure and metadata without visual changes.
Balanced/Maximum render pages to optimized JPEGs for big savings.
Target Size auto‑tunes DPI, JPEG quality, and pixel caps to meet your chosen size.

Is my file private?

Balanced/Maximum and Target Size compression run in your browser. Lossless uses our server only to clean structure; files aren’t stored.

Does it work on mobile?

Yes. The interface is touch‑friendly with large tap targets and responsive previews.

How fast can it reduce PDF size?

Compression streams pages in your browser, so you can compress large PDFs and reduce PDF size in just a few seconds.