Compress PDF

A PDF compressor reduces a PDF's file size. This one runs a lossless structural pass in your browser, stripping document metadata and repacking objects, and reports the size saved. Images aren't re-encoded, so scanned or image-heavy PDFs may shrink little. Downloading needs a free account.

This tool re-saves your PDF with a leaner internal structure and strips redundant metadata, shrinking the file without touching a single pixel of the visible content. PDF files often carry more bytes than their content needs — verbose internal structure, duplicated objects, and metadata fields (author, application version, edit history) that serve no purpose once the document is final.

Be clear-eyed about what this does and doesn't do. It's a lossless, structural compression: text stays crisp, vector graphics stay sharp, and nothing is re-rendered or degraded. What it can't do is recompress embedded images — the biggest source of bloat in scan-heavy or photo-heavy PDFs — because that requires decoding, re-encoding and potentially quality loss, which a lossless browser tool won't do without your explicit consent to a lossy trade-off. For a PDF that's mostly text and light graphics, expect a meaningful reduction; for a PDF built from high-resolution photos, expect the report to tell you the structural pass alone won't move the needle much.

The tool shows you the before-and-after size so you know exactly what you gained. Processing happens entirely in your browser, so uploading a confidential contract or financial report to compress it is not something this tool ever does.