Reduce PDF file size by 50–80%. Fast, free, and secure compression.
Compress PDFs to reduce file size for email, sharing, or storage. Real image recompression via Ghostscript on our secure engine — files are deleted immediately after.
Upload your file using the tool above.
Adjust any settings to your preference.
Click the process button and wait for results.
Download your output using the download button.
Compression works by recompressing embedded images, so the savings depend on what is inside the file. A scanned document or an image-heavy brochure often drops 60–80%. A PDF that is almost entirely text is already compact — there is little image data to squeeze, so a 5–10% reduction is normal and expected.
Light keeps quality virtually untouched and is safe for printing. Balanced is the sweet spot for email and web sharing. Maximum downsamples images noticeably and is best when file size matters more than fine detail. Text and vector graphics stay sharp at every level — only embedded images are recompressed.
Yes. Switch to target-size mode and enter the size you need, such as 2 MB for an upload limit. The engine automatically tunes the compression level to land near your target. It is best-effort: if a PDF is mostly text there may not be enough image data to reach a very aggressive target.
Yes, PDF Compressor is completely free. No signup, no account, and no watermark on outputs. A Pro tier is available for 100 AI ops/day and larger file sizes.
PDF Compressor uploads your file over an encrypted connection to our own processing server, converts it, and returns the result. The file is deleted immediately after processing and is never used for anything else. It is not sent to any third party, and we keep no copies.
Drop your PDF here
Watch it shrink — with a live before/after you can drag
Drop a PDF into the stage. Pick how hard to compress, then drag the slider to compare original vs result.
How it works: Your PDF is compressed by a professional engine (Ghostscript) that recompresses and downsamples embedded images, subsets fonts, and repacks the file structure — producing genuine size reductions, not just cosmetic ones.
Choosing a level: Light keeps quality virtually untouched. Balanced is ideal for email and web. Maximum downsamples images most aggressively for the smallest possible file — great when size matters more than fine detail.
Image-heavy PDFs shrink the most: Because embedded images are the biggest source of PDF bloat, scanned documents and image-rich PDFs often shrink dramatically — frequently by 50% or more on the Balanced and Maximum levels.
Privacy: Your PDF is sent over an encrypted connection, compressed in memory, and deleted immediately after — never stored.