Pixlush

Compress PDF Online Free — Reduce PDF File Size, No Upload

Reduce the size of your PDF documents instantly in your browser.

How to Compress a PDF

  1. Drop your PDF document into the upload area above.
  2. Pixlush analyzes and compresses the images and streams inside your PDF.
  3. Download the smaller PDF file.

Fast, free, and secure. Your sensitive documents never leave your computer.

Why Compress PDFs?

Large PDF files are hard to share via email or upload to web portals that have strict file size limits. Compressing your PDF optimizes the internal structure and reduces image resolution to create a much smaller file footprint while keeping text perfectly legible.

Frequently Asked Questions

Is it safe to compress confidential PDFs here?

Yes. Unlike most PDF compressors, Pixlush operates entirely within your web browser using WebAssembly. Your PDF is never uploaded to an external server, ensuring maximum privacy.

Will compressing my PDF make the text blurry?

No. Our algorithm keeps text sharp and vector-based. Compression primarily targets embedded images and redundant metadata to reduce file size.

Is the compressor completely free?

Yes — no signup, no watermark, no hidden limits. Free forever for personal and professional use.

How do I compress a PDF to under 1MB?

Our tool automatically applies the most efficient compression. If your file is still over 1MB, it may be due to a very high number of high-resolution images within the document.

Does compressing a PDF affect its security?

No. The compression process respects the internal structure of the PDF. However, if a PDF is password-protected, you may need to unlock it first for the best compression results.

Can I compress a PDF on my iPhone or Android?

Yes! Pixlush is fully responsive and works directly in any mobile browser. You can optimize your documents on the go without installing any apps.

How much can I reduce my PDF file size?

Typically, PDFs with many images see a reduction of 50-80%. For text-only documents, the reduction is smaller but still significant for large reports.