Studying from a PDF textbook or a set of lecture slides is easier when your own notes live right on the page next to the material they explain. FixTools lets you build that annotated copy quickly. Upload the PDF, type each note, choose the page, and click the spot where it should sit, whether that is beside a definition, next to a diagram, or under a worked example. When you process the file, your notes are rendered into the pages as visible boxes and you download a marked-up copy to review on any device. You can label notes with an author name to separate your own thoughts from comments shared by a study group. The file is uploaded over an encrypted connection for processing and deleted automatically afterward. It turns a plain reading into an annotated study resource you can come back to before an exam, without printing a single page.
Pin notes beside the exact concept they explain
Build an annotated copy to review on any device
Label notes to separate yours from a study group
PDF Tool
Open the tool to see its processing method, supported formats, and current limits.
🚀Open Add Comments PDFFree tier · No account · Limits shown before processing
Keeping study notes in a separate file means constantly flipping between the material and your commentary, and it is easy to lose track of which note belongs to which paragraph. The context that makes a note useful gets stripped away the moment it lives somewhere else.
Placing notes directly on the PDF keeps each thought anchored to the concept it explains. When you revisit the chapter before an exam, your reasoning is right there beside the definition or the diagram, so you rebuild your understanding faster. An annotated copy also travels well, opening the same on a phone on the bus as on a laptop at a desk.
Upload the textbook or slides, then for each note turn to the page, type it, and click where it belongs beside the material. Process and download your annotated copy.
Step-by-step guide to add notes to a pdf for studying:
Open the tool
Launch FixTools Add Comments to PDF and upload your textbook chapter, handout, or slide deck.
Turn to the page
Use the preview to reach the page you are studying.
Type your note
Enter your explanation, mnemonic, or question, and label it with your name if you are sharing the file.
Click beside the material
Click the preview next to the definition, diagram, or example the note relates to.
Process and review
Run the tool and download the annotated copy to study from on your laptop, tablet, or phone.
Common situations where this approach makes a real difference:
Textbook chapter
A student adds plain-language explanations beside dense definitions in a scanned textbook chapter.
Lecture slides
A note goes next to each slide capturing what the lecturer said that is not written on it.
Study group
Group members each add attributed notes to a shared handout so everyone benefits from the combined comments.
Exam prep
A learner drops likely exam questions beside the relevant material to test themselves on later.
Get better results with these expert suggestions:
Extract the chapter first
Use Extract PDF Pages to pull out just the chapter you are studying, so your annotated copy stays focused.
Highlight then note
Highlight the key line with the Highlight PDF tool, then place a note beside it explaining why it matters.
Keep notes short
Brief, focused notes are easier to scan during revision than long paragraphs crammed into one box.
Label group notes
Set the author name so shared study notes make clear who contributed each point.
More use-case guides for the same tool:
Other tools you might find useful:
Highlight PDF
Highlight the passages your comments refer to.
Extract PDF Pages
Pull out just the pages under review.
PDF Merger
Combine reviewed files back into one document.
Add Comments to Multiple PDFs at Once
Add the same comments to several PDFs in one batch. Upload multiple files, set your notes once, process them together, and download every annotated copy.
Add Comments to a PDF Without Adobe
Add comments to a PDF without Adobe Acrobat or an account. Type notes, click to place them in your browser, and download the annotated file free.
Add Feedback to a PDF for Grading
Add feedback comments to a student PDF for grading. Place attributed notes on the exact line, process, and return a clear marked-up copy students can follow.
Add Comments to a PDF on Windows
Add comments to a PDF on Windows without Acrobat or extra software. Type notes, click to place them in Edge or Chrome, and download the annotated file.
Add Comments to a PDF for Team Collaboration
Add attributed comments to a PDF so a team can collaborate on one file. Place notes on the exact spot, name each author, then pass the marked-up file on.
Add Comments to a PDF on Mac
Add comments to a PDF on your Mac without Preview or extra software. Type a note, click to place it, and download the annotated file from Safari or Chrome.
Open Add Comments PDF to review its free limits and processing method.
Open Add Comments PDF →Free tier · No account needed · Transparent limits