Annotating a PDF for review means adding comments, marks, and notes to a document so whoever produced it knows exactly what to change. The good news is you do not need an expensive Acrobat licence to do it well — and for collaborative review, a dedicated tool is often better than Acrobat anyway.
The built-in options (and their limits)
Most PDF viewers include basic markup. Preview on Mac and the free Acrobat Reader let you highlight, add sticky notes, and draw. These are fine for marking up a document for yourself or sending a one-off note back. Their weakness is collaboration: you end up emailing marked-up copies back and forth, and merging feedback from several people becomes a manual nightmare.
Why online proofing beats a marked-up copy
When more than one person needs to review a PDF, an online proofing tool is a different league. Everyone annotates the same document in the browser, comments are pinned to the exact spot, you can see who said what, and there is one version of truth instead of five conflicting copies in your inbox. Nobody needs Acrobat, and nobody needs an account to leave feedback.
How to annotate a PDF in a proofing tool
The flow is simple: upload the PDF, share a review link, and your reviewers open it in any browser. They click the spot that needs changing and type their comment — pinned precisely to that location on the page. You work through the comments, upload a corrected version, and they approve. No software to install, no licences to buy for reviewers.
Choosing the right method
For a private note to yourself, the free built-in tools are plenty. For a document that several people need to review, or where you need a record of who approved the final version, use a proofing tool. The deciding factor is collaboration: the moment feedback comes from more than one person, marked-up copies stop scaling and shared annotation takes over.
“The deciding factor is collaboration. For a private note, the free built-in tools are fine — but the moment more than one person needs to review a PDF, marked-up copies stop scaling.”
Ways to annotate a PDF for review
- Preview (Mac) — highlight and sticky notes, fine for solo markup
- Free Acrobat Reader — basic comments and drawing
- Online proofing tool — shared, pinpoint annotation for multiple reviewers
- Best for teams: one live version, pinned comments, no account needed
Frequently asked questions
How do I annotate a PDF without Adobe Acrobat?
Use the free built-in tools (Preview on Mac, free Acrobat Reader) for solo markup, or an online proofing tool for collaborative review. Proofing tools let multiple people annotate the same PDF in a browser with no paid licence and no account.
Can multiple people comment on the same PDF?
Yes, with an online proofing tool. Everyone opens the same review link in a browser and pins comments to exact spots on the page, so you get one consolidated set of feedback instead of several conflicting marked-up copies.
Do reviewers need to install anything to annotate a PDF?
Not with a browser-based proofing tool. Reviewers open a link, click where they want to comment, and type — no software install and no account required. That is what keeps PDF feedback fast across a team.
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