PDFMaxAnnotate PDF Online
Need to mark up a PDF without buying expensive software? PDFMax lets you annotate a PDF right in your browser. Highlight key sentences, add text comments, and draw shapes to point out what matters — then download the marked-up file. It's a fast way to review a contract, give feedback on a draft, or flag pages for a colleague. Everything runs in the browser, so there's nothing to install and no account to create. The tool is completely free, with no signup, and works the same on your phone, tablet, or computer. Open your file and start annotating in seconds.
Annotate PDF →100% freeNo signupWorks in your browser
Why PDFMax
- Highlight text, add notes, and draw shapes in one place — no editor to learn
- 100% free with no signup and no software to install — it all runs in your browser
- Works on any device: annotate from your phone, tablet, Windows, Mac, or Linux
- Keeps your original layout and text quality intact when you download the marked-up PDF
How to annotate PDF
- Open your PDFClick to choose a PDF from your device, or drag and drop the file into the tool. It loads straight in your browser.
- Add your annotationsPick a tool to highlight text, add a text note, or draw shapes, then place them where you need on the page.
- Adjust as neededMove or edit any highlight, note, or shape until your markup looks right across all the pages.
- Download the resultSave the annotated PDF back to your device — your highlights, text, and shapes are baked into the file.
Frequently asked questions
Is it free to annotate a PDF here?
Yes. Annotating PDFs on PDFMax is completely free. There's no signup, no subscription, and no watermark added to your file.
Is it safe and private?
Your PDF is processed for your task and not shared with anyone. Since there's no account to create, you don't hand over any personal details to use the tool.
Are there any limits?
There are no signup or paywall limits for everyday use. Very large files may take a little longer to load and annotate, depending on your device and connection.
Can I annotate a PDF on my phone?
Yes. The tool works in any modern mobile browser, so you can highlight text and add notes on a phone or tablet just like on a desktop.
Will annotating reduce the quality of my PDF?
No. Your original text and layout stay intact. The highlights, text, and shapes are simply added on top, so the rest of the document keeps its quality.
What can I add to my PDF?
You can highlight text, add text comments, and draw shapes to mark up the pages. Then download the finished file with all your annotations included.