To remove private details for good, use Redact PDF.
How editing works
Choose Edit text and click any line. Type your change, then click outside the line or press Enter. The original words are taken out of the page and your words are written in the same place, size and colour. Everything else on the page, such as pictures, tables and other text, is left exactly as it was.
Add text puts a new text box wherever you click. Drag any box to move it, and use the panel to change its font, size, colour, bold or italic. Undo and redo cover every change, and you can zoom in for small print.
About fonts
Fonts are matched, not copied. Most PDFs only carry the letters they already use, so new words are written with the nearest standard font: Helvetica, Times or Courier, chosen by the original font's name and weight. An edited line can look slightly different from the text around it, so check the result before you send it. Letters outside the standard set, such as Greek or Cyrillic, are written with Open Sans. Scripts such as Devanagari, Arabic, Chinese and Japanese are not supported.
Whiteout and images
Whiteout draws a box over part of the page, in white or any colour. It only covers what is underneath: the hidden text is still inside the file and can be copied out. To remove private details for good, use Redact PDF. Images can be a logo, a stamp or a signature, and if you keep a logo or signature in Your kit, it is one click away.
Scanned and locked PDFs
A scanned page is a picture, so it has no lines to click. You can still add text, images and whiteout, or run it through Make PDF searchable first. A PDF with a password or edit limits needs to be unlocked with its password before it can be changed.
Privacy
Your PDF is opened, edited and saved entirely in your browser. Nothing is uploaded, and the file you opened is never changed: every download is a new copy.