What is Annotate PDF and how does it work?

Annotate PDF is a free online tool from HuntPDF. Add a text note to any page of your PDF. You upload a file, the work happens on our servers, and you download the result. There is nothing to install and no account to create.

How do I use Annotate PDF online?

Upload your file using the box above — drag it in, browse for it, or bring it in from your cloud storage. A preview appears so you can check you've picked the right file. Run Annotate PDF, then download the result. You can rename it before you save it.

Is my file secure when I use Annotate PDF?

Yes. The file you send to Annotate PDF travels over an encrypted HTTPS connection and is processed automatically on our servers. It is never made public, never shared with anyone, and nobody reads it.

Does HuntPDF store my files after Annotate PDF has run?

No. Your upload is deleted the moment Annotate PDF finishes with it, and the file it produces is removed as soon as you have downloaded it, or when you upload another file, or when you close the page. Nothing is kept, and nothing is used to train anything.

Will the original quality and formatting be maintained?

Yes. Annotate PDF is built to leave your content exactly as it is — only the change you asked for is applied. Nothing else about the file is altered or re-compressed.

Can I use Annotate PDF on mobile?

Yes. Annotate PDF works in any modern browser on phones and tablets — iPhone, iPad or Android — with nothing to install. You can upload straight from your device or from your cloud storage.

Can I rename my file before downloading it from Annotate PDF?

Yes. The file Annotate PDF gives you back keeps the name of the file you uploaded by default. If you'd rather call it something else, edit the name in the field next to the download button before you save it.

Do I need to install any software to use Annotate PDF?

No. There is nothing to download, install or sign up for — Annotate PDF is used from your browser and does the work on our servers, so it behaves the same on Windows, macOS, Linux, Android and iOS.

How long does Annotate PDF take?

Most files are finished in a few seconds. A large or page-heavy file takes a little longer, because Annotate PDF runs on our servers rather than on your device — but you won't be waiting around. You can upload files up to 250MB.

Is Annotate PDF free to use?

Yes. Annotate PDF is free, with no signup, no watermark on the result and no daily limit for normal use.

Annotate PDF Online

Draw, highlight, add text, boxes and whiteout — across any page — then flatten it into your PDF.

Drop your file here

Choose file

Processed securely over HTTPS on our servers, then deleted after processing. No file is stored, shared, or used for training.