Step-by-step guides for working with PDFs and images. Follow along right in your browser, with nothing to install or upload.
- How to reduce PDF file size (without uploading)Make a PDF small enough for email or upload limits. Why PDFs get big, which level to choose, and what to do when a PDF will not shrink.
- How to reduce image file size (JPG and PNG)Shrink phone photos and screenshots while keeping them looking the same. How JPG and PNG shrink differently, and when to use WebP.
- How to resize an image (change its pixel size)Change the width and height of photos by percentage or in pixels. How to make many images the same size, the difference between keeping the aspect ratio and an exact size, and how size affects file size.
- How to merge PDF files into oneCombine several PDF files into one in the order you want. Reordering files and pages, leaving out pages, and merging password-protected PDFs.
- How to convert PDF to JPG imagesTurn PDF pages into JPG or PNG images. Converting every page or only some, choosing between JPG and PNG, and the difference between 150 and 300 DPI.
- How to sign a PDF (no printer needed)Add a handwritten signature to a contract or consent form PDF. Drawing with a mouse or finger, using a photo of a paper signature, signing every page, and how this differs from a digital signature.
- How to convert WebP and PNG to JPGWhen a saved WebP will not open, or a PNG is too big. The differences between JPG, PNG and WebP, which to choose, and how to handle iPhone HEIC photos.