Compress PDF
Reduce PDF file size by removing metadata and optimizing structure. Lossless, browser-based, no upload.
100% client-side · no upload
This tool removes metadata and optimizes PDF structure (lossless). Best results on text-heavy PDFs. Image-heavy PDFs will see modest reduction.
Download compressed.pdf
How to use
- Drop your PDF into the upload area.
- Click <strong>Compress PDF</strong> — the tool removes metadata and optimizes structure.
- Check the size savings shown in the stats.
- Download the compressed PDF.
Related PDF tools
Common uses
よくある質問
- Does this upload my PDF?
- No. All processing happens locally in your browser using pdf-lib. Nothing is sent to any server.
- Does this work on mobile?
- Yes. Works in Safari on iPhone/iPad and Chrome on Android. Tap the upload area to select a PDF.
- Is there a file size limit?
- No imposed limit. The practical limit is your device memory. Most modern devices handle hundreds of megabytes.
- Are password-protected PDFs supported?
- No. Remove the password from the PDF first using your PDF reader, then use this tool.
- What PDF versions are supported?
- Standard PDF 1.x and 2.0 files. Encrypted PDFs are not supported.
- Is the output quality the same as the input?
- Yes. The tool does not re-encode page content. Text remains selectable and images retain full resolution.