PDF Compressor
Shrink a PDF for email and sharing, free in your browser. Your PDF is re-saved and optimised on your device — no upload, no signup, no watermark.
Honest note: this tool re-saves your PDF with pdf-lib, strips unused data and metadata, and rebuilds it cleanly. That usually makes it smaller — but it does not recompress the images inside a PDF, so a photo-heavy PDF may only shrink a little. The result is always a valid PDF.
Your result will appear here
Compressed PDF
If the new file is barely smaller, your PDF was already well optimised — or its size is mostly images, which this tool does not recompress.
Related searches: compress pdf free, reduce pdf file size, make pdf smaller online, shrink pdf no signup, pdf size reducer.
How to use
- Choose a PDF from your device.
- Click Compress PDF — it is re-saved and optimised in your browser.
- Compare the sizes, then download the smaller PDF.
Frequently asked questions
Is my PDF uploaded to a server?
No. Compression runs entirely in your browser with the pdf-lib library — your document never leaves your device.
How much smaller will my PDF get?
It depends on the file. Text-heavy PDFs and ones with unused data often shrink noticeably; photo-heavy PDFs shrink only a little, because this tool does not recompress embedded images.
Will the compressed PDF still open normally?
Yes. The output is a standard, valid PDF with the same pages and content — only unused data and metadata are removed.
Is there a file size limit?
PDFs up to 50 MB. Larger files are refused with a clear message so the browser tab does not run out of memory.