Optimize
Compress PDF
Shrink file size by recompressing embedded images.
Drop files here, or click to browse
PDF files only · stays on this device
Private by design. Reduce PDF file size by recompressing embedded images at a lower quality and resolution, right in your browser. Your file is processed entirely in this browser tab using WebAssembly — it is never uploaded anywhere, so it stays yours even on a shared or offline computer.
Frequently asked questions
- How much smaller will my PDF get?
- It depends on the file — PDFs full of photos shrink the most, since compression works by recompressing embedded images. Text-only PDFs may barely change.
- Which preset should I choose?
- Balanced works well for most files. Use Light if you need to preserve image quality, or Aggressive when file size matters more than quality.
- Will compressing lower my PDF’s image quality?
- Yes, slightly — images are re-encoded at a lower quality and resolution. Text and vector content are left untouched.