EDIT PDF
Free PDF Markup online
Add markup notes and highlight boxes.
PDF Markup is a free browser tool that lets you add markup notes and highlight boxes. Add your PDF, adjust the PDF Markup options if you need to, then download the result immediately. PDF Markup works on your device only, so no file or text is ever uploaded.
- Free to use
- No signup
- No uploads
- Works offline
Why use PDF Markup
- add markup notes and highlight boxes without installing software
- Your PDF is processed on your device by PDF Markup, never uploaded
- PDF Markup needs no account, email address or payment details
- PDF Markup is batch-friendly: reuse it immediately on the next file
- PDF Markup is keyboard accessible and screen-reader friendly
- PDF Markup is free forever, with no watermark on the result
PDF Markup 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 PDF Markup
- 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 PDF Markup handles your input.
- Run the tool PDF Markup 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 PDF Markup works. PDF Markup never sends it to a server, so confidential work stays confidential.
Instant results
There is no upload step, so PDF Markup starts the moment you add your PDF.
No signup, no limits
Use PDF Markup as many times as you want. PDF Markup asks for no account, adds no watermark and keeps no paid tier gating the output.
Works offline
Once the page has loaded, PDF Markup keeps working without a connection, which helps on flights and locked-down networks.
Who it is for
For students
Students use PDF Markup to hand in coursework without installing software: add markup notes and highlight boxes on a shared or locked-down machine.
For freelancers
PDF Markup helps freelancers send client deliverables quickly, since your PDF never leaves the laptop it was created on.
For legal and finance teams
PDF Markup helps legal and finance teams handle sensitive documents quickly, since your PDF never leaves the laptop it was created on.
How it works
PDF Markup 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 PDF Markup happens inside your browser sandbox.
Frequently asked questions
Is PDF Markup free to use?
Yes. PDF Markup is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does PDF Markup upload your PDF to a server?
No. PDF Markup 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 PDF Markup.
Do I need to install anything to use PDF Markup?
No installation is needed. PDF Markup runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use PDF Markup on a phone or tablet?
Yes. The PDF Markup 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. PDF Markup keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
Related tools
- Highlight PDF | Highlight matching text in your PDF
- Annotate PDF | Add text annotations and notes to PDF
- Merge PDF | Combine multiple PDFs into one document
Last updated: 2026-09-07