PDF Tools — Merge and Optimize PDFs

Combine multiple PDF files into one, or reduce a PDF's file size — entirely in your browser.

Merge PDFs

Choose PDF files or drag them here

Reduce PDF size

Choose a PDF or drag it here

About these tools

Both tools run entirely in your browser — your files are never uploaded anywhere. "Optimize" restructures the PDF's internal objects, which helps with some files; it doesn't recompress embedded images, so it won't shrink every PDF significantly.