Reduce PDF file size to save storage space
Reduce file size for email limits
Save storage space
Faster upload speeds
Reduce data usage
PDF compression works by removing duplicate data inside the file and optimizing object streams. It reduces file size by cleaning up unnecessary metadata and duplicate font information, and all processing is done within your browser.
This tool uses structural optimization compression, so text quality is not affected at all. Images retain their original data, so quality is preserved to a level indistinguishable to the naked eye.
Since processing is done in the browser without uploading to a server, there is no server-side size limit. However, very large files (100MB+) may process more slowly depending on browser memory.
Yes. The structural optimization method preserves the PDF's text layer intact, so text search, copy, and hyperlink functionality all work normally after compression.
PDF compression is an essential solution when email attachments exceed size limits (typically 10–25 MB) or when web upload speeds are slow. Compressed PDFs save cloud storage space and significantly reduce data usage on mobile devices.
Structure optimization compression works by removing unnecessary objects and duplicate data inside the file, making it effective for text-heavy documents. PDFs with many images can achieve higher compression rates through image recompression, and you can generally expect a 10–40% reduction in file size compared to the original.
Setting the image resolution appropriately for its intended use when creating a PDF can significantly reduce file size. For on-screen documents, 72–96 DPI is sufficient; for print, 150–300 DPI is enough. Also, removing unnecessary pages before compressing makes it even more effective at reducing file size.