How do I reduce PDF file size?

Upload your PDF and our compressor automatically optimizes it by removing unused objects and applying object-stream compression. Download the smaller file instantly.

Will compression reduce PDF quality?

No. Our compressor reduces file size by removing redundant data and optimizing the internal structure. Text, images, and formatting remain identical to the original.

How much can PDFs be compressed?

Results vary depending on the original file. PDFs with lots of embedded fonts, metadata, or redundant objects can see 10-60% size reductions. Already optimized files may see smaller gains.

PDF Compressor

Compress PDF file size without losing quality. Reduce PDF size online for free.

Related:PDF Merger PDF Splitter

Click to upload a PDF fileYour file never leaves your browser

How PDF Compression Works

Our compressor reads your PDF, rebuilds it from scratch, and applies object-stream compression. This removes unused objects, duplicate data, and metadata bloat. The result is a clean, smaller PDF that looks identical to the original.

100% Private Compression

Your PDF never leaves your browser. All compression happens locally using JavaScript — no server upload, no waiting for cloud processing. This means your confidential documents stay completely private.

Frequently Asked Questions

How do I reduce PDF file size?: Upload your PDF and our compressor automatically optimizes it by removing unused objects and applying object-stream compression. Download the smaller file instantly.
Will compression reduce PDF quality?: No. Our compressor reduces file size by removing redundant data and optimizing the internal structure. Text, images, and formatting remain identical to the original.
How much can PDFs be compressed?: Results vary depending on the original file. PDFs with lots of embedded fonts, metadata, or redundant objects can see 10-60% size reductions. Already optimized files may see smaller gains.