How to Use the Compress PDF
- Select the PDF file you want to compress.
- Click compress to optimize the document.
- See the original size, new size and percentage saved.
- Download the smaller PDF.
Frequently Asked Questions
How much smaller will my PDF get?
It depends on the file. PDFs with redundant structure or uncompressed streams shrink the most; already-optimized or image-heavy PDFs may only reduce a little.
Does compression lower quality?
This tool optimizes the document structure and object streams without re-rasterizing pages, so text stays sharp and the visual content is preserved.
Is my document uploaded anywhere?
No. Compression is performed locally in your browser with pdf-lib, so your file never leaves your device.
Why compress a PDF?
Smaller PDFs are faster to email (many services cap attachments around 25MB), quicker to upload, and take less storage space.