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Edit & annotate

Add Comments

Attach sticky-note comments to any spot on a page.

Size limit shown is a conservative default; the server applies your plan's real limit.

Options

Place text, images, links, shapes and marks exactly where you want them on the page.

Open in editor

Add a file to begin.

How it works

  1. 1Upload your file — drag it in or pick it from your device.
  2. 2Choose the options you need; defaults work for most files.
  3. 3Press Process and watch the progress in real time.
  4. 4Download the result. Anonymous files are deleted shortly after.

What this tool does

  • Accepts: .pdf · one file at a time
  • Produces: pdf
  • Runs on: the pdf worker, in an isolated process with a 3-minute ceiling
  • Account: required, because the result is stored in your workspace
  • API: available as toolSlug: "add-comments"

Questions

Can other people reply?

Anyone can reply in their own PDF reader — Acrobat and Preview both support replies to standard notes. Each note carries the author name you set.

Are comments visible in other readers?

Yes, they are written as standard text annotations.

Security note

Files are checked to be what they claim (by content, not extension), processed in a sandboxed worker with no network, and deleted on the schedule your plan sets. We do not run antivirus and do not claim to — please do not upload files you do not trust. Read the security page.