PDF Compressor — Free Online Tool
Reduce PDF file size without losing quality
How to use this tool
- [01]Upload the PDF file you want to shrink.
- [02]The tool re-encodes embedded images and removes redundant internal objects automatically.
- [03]Download the compressed PDF — the text layer stays intact and selectable.
About this PDF Compressor
The PDF Compressor uses pdf-lib in your browser to shrink file size by re-encoding embedded images and removing redundant internal objects, while leaving the document's text layer intact as real, selectable text rather than flattening pages into images. That distinction matters: a PDF compressed this way stays searchable and copy-pasteable, unlike compression methods that rasterize each page.
Most of a PDF's size comes from embedded photos and scanned images, so documents with heavy image content — product catalogs, scanned contracts, photo-based reports — see the largest reduction, while text-only documents (already small) shrink less dramatically since there's less to compress. The tool currently works on standard, non-encrypted PDFs; a password-protected file needs its password removed first in a PDF reader before compressing.
The most common trigger for this tool is an email attachment limit or a portal upload cap that rejects a file over a certain size, along with simply wanting faster uploads and downloads for a document that will be shared or archived repeatedly. Processing happens locally, so the document's contents never leave your device during compression.
Our PDF Compressor is completely free to use with no signup required. For this tool, processing runs in your browser — your files and data stay on your device and are not uploaded to our servers.
Whether you are a developer, designer, student, or business owner, this tool is designed to save you time and make your workflow more efficient. Bookmark this page to access it whenever you need it — it will always be free.
Frequently asked questions
Is the PDF Compressor completely free?
Yes, the PDF Compressor is 100% free to use with no hidden charges, no subscription, and no signup required. Simply visit the page and start using it immediately.
Does this tool upload my files to a server?
No. Everything runs entirely in your browser using JavaScript. Your files, text, and data never leave your device and are never sent to our servers. This makes it completely private and secure.
Does the PDF Compressor work on mobile?
Yes, the PDF Compressor is fully responsive and works on all devices including smartphones, tablets, and desktop computers. It works on Chrome, Firefox, Safari, and Edge browsers.
How accurate is this tool?
Our PDF Compressor uses industry-standard algorithms to ensure accurate results every time. It has been tested extensively across different browsers and devices to ensure consistent and reliable output.
Will compression affect the text or make it unselectable?
No. The compressor only re-encodes embedded images — the text layer stays intact as real, selectable, searchable text, unlike tools that flatten pages into images.
Can I compress a password-protected PDF?
Not directly — the tool works on standard, non-encrypted PDFs. Remove the password in your PDF reader first, then compress the file.
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