Compress PDF
Make a PDF smaller by rewriting its internal structure more efficiently. Best results come from documents that were never optimized.
Processed in your browser. This tool reads your file locally and does not upload it to any server. How we handle your files.
How to compress pdf
Step 1
Choose the PDF you want to shrink.
Step 2
Click Compress PDF and wait for the document to be repacked.
Step 3
Compare the before and after sizes, then download.
Why use IlikePDF?
Your files stay with you
Tools marked as browser-based read your document locally. There is no upload step, no server-side storage and no account.
No signup, no watermarks
Every tool is free to use and adds nothing to your document that you didn't ask for.
Honest about limits
Where a conversion can't be perfect in a browser, we say so on the page instead of shipping a file that quietly loses your formatting.
Works on your phone
The interface is built for small screens as well as desktop, so you can fix a document wherever you are.
Frequently asked questions
Why did my file barely shrink?
This tool repacks PDF structure using object streams. If most of the file is embedded photographs, there is little structural overhead to remove and the saving will be small.
Does compression reduce image quality?
No. Images are carried across untouched, so the document looks identical. That is also why image-heavy files compress less.
Can it make a file bigger?
Occasionally, on already-optimized documents. The tool reports both sizes so you can simply discard the result.