# Annotate PDF: Arthize vs Sejda

_Updated July 2026 · Arthize · https://arthize.com/vs/sejda/annotate-pdf_

To annotate a PDF, Arthize offers a free, private annotate pdf with no watermark — a focused alternative to Sejda. Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text.

## Arthize's annotate pdf vs Sejda

Sejda is a web and desktop PDF editor. Sejda offers capable editing with daily task limits on its free tier.

**Arthize's approach:** Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text.

- Files are processed inside your private Arthize workspace and deleted after the job — never sold or used to train models.
- Transparent pricing: free forever, Pro from $6/mo or $48/yr, and a one-time $149 lifetime option.
- A lifetime option beyond weekly or monthly plans.
- The free plan never adds a watermark to your output.

## How to annotate a PDF with Arthize

Annotations sit on top of the page and don't change the underlying text.

You can highlight, comment, draw and add notes.

Annotated files are ideal for review and feedback.

## How to annotate a PDF with Arthize

1. **Open the editor** — Sign in and open the PDF editor.
2. **Add your PDF** — Upload the document to mark up.
3. **Add annotations** — Highlight text, add comments, draw shapes or leave notes.
4. **Download** — Save the annotated PDF.

## FAQ

### Is Arthize a good Sejda alternative to annotate a PDF?

Yes. Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text. Arthize does it free with no watermark and deletes the file after the job. Sejda's in-browser editor is genuinely capable for detailed edits.

### How do I annotate a PDF?

Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text. On Arthize it's free with no watermark and processed privately.

### Can I highlight and comment on a PDF?

Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text. On Arthize it's free with no watermark and processed privately.