Edit & Annotate

Write and draw on a PDF: text boxes, highlights, shapes, notes, stamps and signatures. The text already in the PDF cannot be changed.

Add electronic signatures to PDF documents. Draw, type, or upload your signature.

Crop the pages of a PDF to the area you frame. What lies outside the frame is hidden, not deleted from the file.

Add, edit, and manage PDF bookmarks. Create navigation structure for your documents.

Generate a table of contents for your PDF. Create clickable navigation from bookmarks.

Add page numbers to PDF documents. Customize position, format, and starting number.

Put a text or an image watermark on the pages of a PDF, once in the middle of each page or repeated across it.

Add headers and footers to PDF documents. Include page numbers, dates, and custom text.

Reverse the colours of every page of a PDF for reading on a dark background. Each page comes back as an image.

Put one colour behind the content of every page of a PDF.

Recolour the dark (or light) parts of every page of a PDF, which changes the colour of ordinary text. The pages come back as pictures.

Add stamps to PDF documents. Use preset or custom stamps for approval, review, and more.

Remove every annotation from a PDF: comments, highlights, notes, stamps, drawings, links and form boxes.

Fill in a PDF form on its own pages, in your browser: type, tick and choose in the form itself, in Arabic too, then download it filled in.

Create fillable PDF forms: text boxes, checkboxes, radio buttons, dropdowns, lists, date fields, signature fields and buttons. Values and choices can be in Arabic.

Make a grey version of a PDF. The standard method turns every page into a picture; the Ghostscript option converts the colours and keeps the text.

See the layers (Optional Content Groups) of a PDF and change them: show or hide a layer, rename it, lock it, merge it into the page, or delete it with what is on it.

Find the headings of a PDF by the size of their type and their numbering, look through the list, and add nested bookmarks. Free, in your browser.

Add a contents page to a PDF: its headings are found, looked through by you, and listed at the front with their page numbers and links.

Add links to the numbered citations of a PDF, such as [3]: each opens the DOI its reference prints or jumps to the reference. Free, in your browser.

Add rules to a PDF form: show, hide, lock or require a field depending on a tick box, a list or what is typed in another field. Free, in your browser.

Draws a small red label, such as Sign here, onto one page of a PDF at a spot you choose, to show a signer where to sign.

Turns a JPG or PNG photo of a signature or stamp into a PNG with a transparent background by removing every pixel brighter than a level you set.

Whitens the paper in a PNG or JPG photo of handwriting and darkens or strengthens the ink, using a brightness level and a contrast setting you choose.