Compress PDF Files Online Free

PDF compression reduces the file size of your PDF documents without significantly affecting visual quality. Large PDFs are common when documents contain high-resolution images, embedded fonts, or unnecessary metadata — making them difficult to email, upload, or share.

Our PDF compressor works by removing unused objects, stripping metadata, and optimizing the internal document structure. This can reduce file sizes by 5-50% depending on the content. Text-heavy documents typically see smaller reductions, while image-heavy PDFs benefit the most.

Unlike other online PDF compressors that upload your files to cloud servers, our tool processes everything locally in your browser. Your documents never leave your device — perfect for compressing confidential files.

1. Upload your PDF — Select the file you want to compress.
2. Click "Compress PDF" — The tool optimizes the document structure and removes unnecessary data.
3. Review results — See the original size, compressed size, and reduction percentage.
4. Download — Save the smaller PDF file.

• Instant compression — Results in seconds, no waiting for server processing.
• Size comparison — See exactly how much space was saved with before/after sizes.
• Metadata removal — Strips title, author, keywords, and other metadata to save space.
• Structure optimization — Uses PDF object streams for more efficient encoding.
• 100% client-side — Your files stay on your device. Nothing is uploaded anywhere.

• Email attachments — Reduce PDF size to fit within email attachment limits (typically 10-25MB).
• Website uploads — Compress documents for faster web hosting and downloads.
• Cloud storage — Save space in Dropbox, Google Drive, or OneDrive.
• Form submissions — Meet file size requirements for job applications, government forms, or university submissions.
• Mobile sharing — Create smaller files that are faster to send via messaging apps.