Compress PDF Online — Reduce File Size
Compress PDF files to shrink their size while keeping quality. Free and processed entirely in your browser.
Click to select files
or drop them here
How to compress a PDF
- 1Select or drop the PDF you want to shrink.
- 2Pick a compression strength — Recommended suits most files.
- 3Click Compress and download the smaller PDF.
FAQ
Is the compression lossless?
Yes — content is recompressed structurally (streams, duplicate objects, metadata) with no change in visual quality.
How much smaller will my file get?
Depends on the file: PDFs with duplicated resources or uncompressed streams shrink a lot; already-optimized files may barely shrink.
Why not compress images like iLovePDF does?
True image downsampling needs a heavyweight engine (Ghostscript) — it's planned for our upcoming backend service. The current tool is 100% lossless and in-browser.
Are my files uploaded anywhere?
No — compression runs locally via WebAssembly.