Pen, text, highlighter and shapes on an endless canvas in your browser. No download, and your markup saves on its own.
Answer: photosynthesis
The canvas keeps going past the edge of the sheet, so working out has somewhere to go.
Annotating inside a PDF viewer means working within the page. Pappper puts the page on a canvas that keeps going, so a calculation that does not fit in the blank can continue next to it, and the sketch, the screenshot and your notes can all sit beside the sheet they belong to.
Your markup is stored against the document, so it travels with its page when you switch between one page and two side by side. A single undo puts the layout back.
A board holds more than one document. Drop in a second PDF or a Word file, paste a picture from your clipboard, paste a YouTube link and it plays right there, or drop in an audio file.
Everything you upload is searchable. Search for a phrase across your whole library, or describe a diagram to find it again.
If you need to change the words already printed on the PDF, sign a contract, or build a form with fillable fields, use a dedicated PDF editor. Pappper is made for working on top of a document, not for rewriting it.
Yes. Pappper runs in your browser. Open it, upload the PDF, and start writing, without an account if you like.
Yes. Use a mouse, a trackpad, a finger or a stylus. On a touch screen, two fingers move and zoom.
Yes. Your work saves as you go, in this browser without an account and in your account once you sign in.