Compress PDF

Pick a PDF. The tool re-saves it with compressed object streams in your browser. If the file was already efficiently built, the new file may not be smaller, and the tool will say so honestly instead of claiming a saving. Privacy note: PDF tools run in your browser using the pdf-lib library loaded from a CDN. Your files are not uploaded to a server; they stay on your device. If the library cannot load, a clear message is shown. Encrypted PDFs cannot be opened.