ADVANCED PDF
Free Annotate PDF online
Add text annotations and notes to PDF.
Annotate PDF on DocTools helps you add text annotations and notes to PDF, with no account needed. Drop your PDF into Annotate PDF, choose your settings, and save the finished file. Annotate PDF runs locally on your device, so nothing is uploaded to a server.
- Free to use
- No signup
- No uploads
- Works offline
Why use Annotate PDF
- add text annotations and notes to PDF without installing software
- Your PDF is processed on your device by Annotate PDF, never uploaded
- Annotate PDF needs no account, email address or payment details
- Annotate PDF is batch-friendly: reuse it immediately on the next file
- Annotate PDF is keyboard accessible and screen-reader friendly
- Annotate PDF is free forever, with no watermark on the result
Annotate PDF runs entirely inside your browser. Your PDF is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use Annotate PDF
- Add your PDF Drag your PDF onto the drop zone or pick it from your device.
- Adjust the options Set the options that control how Annotate PDF handles your input.
- Process it Annotate PDF works instantly on your device, with no queue and no upload wait.
- Download the result Save the finished file straight to your device, then reuse the tool as often as you like.
Benefits
Private by design
Your PDF stays on your device while Annotate PDF works. Annotate PDF never sends it to a server, so confidential work stays confidential.
Instant results
Annotate PDF finishes most jobs in under a second because the work happens on your own hardware.
No signup, no limits
Use Annotate PDF as many times as you want. Annotate PDF asks for no account, adds no watermark and keeps no paid tier gating the output.
Works offline
Once the page has loaded, Annotate PDF keeps working without a connection, which helps on flights and locked-down networks.
Who it is for
For students
Students use Annotate PDF to hand in coursework without installing software: add text annotations and notes to PDF on a shared or locked-down machine.
For freelancers
Annotate PDF helps freelancers send client deliverables quickly, since your PDF never leaves the laptop it was created on.
For HR and admin teams
Annotate PDF helps HR and admin teams process paperwork quickly, since your PDF never leaves the laptop it was created on.
How it works
Annotate PDF loads your PDF into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of Annotate PDF happens inside your browser sandbox.
Frequently asked questions
Is Annotate PDF free to use?
Yes. Annotate PDF is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does Annotate PDF upload your PDF to a server?
No. Annotate PDF processes your PDF inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a file size limit?
The practical ceiling is your device's available memory rather than a server quota. Files up to roughly 100 MB work comfortably on a typical laptop in Annotate PDF.
Do I need to install anything to use Annotate PDF?
No installation is needed. Annotate PDF runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use Annotate PDF on a phone or tablet?
Yes. The Annotate PDF interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your PDF when I close the tab?
It is discarded. Annotate PDF keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
Related tools
- Add Arrows | Draw arrow annotations on PDF
- PDF Markup | Add markup notes and highlight boxes
- Merge PDF | Combine multiple PDFs into one document
Last updated: 2026-09-07