Students handle more PDFs than almost anyone: lecture slides, journal articles, past papers, submission forms, textbook chapters, scanned handouts. Nobody should be paying for software to manage that, and nobody needs to. Between what is already on your machine and a handful of free tools, the entire workload is covered.
Start with what your university already gives you
Before installing anything, check your institutional account. Most universities provide Microsoft 365 free, which includes Word — and Word opens PDFs directly and converts them to editable documents, which is a genuinely useful conversion tool you may not know you have. Many also provide Adobe Creative Cloud or discounted Acrobat access, and some provide Grammarly Premium or reference managers.
Students routinely pay for tools their library already licenses. Ten minutes on the IT services page is worth more than any list of free alternatives.
Reading and annotating papers
This is the largest share of student PDF work, and the best tools are ones you already have.
Your browser. Chrome, Edge, and Firefox all annotate and highlight PDFs now, and save the result. For a quick markup of a lecture handout this is genuinely enough.
macOS Preview. Highlighting with Cmd-Ctrl-H, a highlights sidebar listing everything you marked, and instant search. For anyone on a Mac this is the fastest reading tool available and it is already installed.
Adobe Acrobat Reader. Free, cross-platform, with the fullest annotation set including a comment list that summarises your markup.
An iPad with a Pencil. If you have one, this is the best paper-reading setup that exists — annotate in Files, Books, or a dedicated reader, and the experience is closer to marking up print than anything on a laptop.
Zotero or Mendeley. If you are writing a dissertation, use a reference manager. Both are free, both store and annotate PDFs, both generate citations in whatever style your department demands, and both save you from a folder of files named paper (3).pdf. Starting one in first year and maintaining it beats assembling one in a panic in final year. See citation management with PDF papers.
Filling forms and signing
Registration forms, placement agreements, consent forms, funding applications, and ethics paperwork all arrive as PDFs needing completion and a signature.
Docento.app handles this in the browser: add text, tick boxes with stamps, place a signature, and export — free, no account, and the file is processed on your own machine rather than uploaded, which matters for anything carrying your student number, address, or bank details. See how to fill out a PDF form and how to sign a PDF online.
To be accurate about what it does not do: no OCR, no format conversion, no merging, splitting, or page rotation. For those, see below.
Restructuring documents
Merging, splitting, extracting, rotating. On a Mac, Preview does all of it — combine readings into one file, pull three pages out of a scanned chapter, fix a sideways scan. On Windows, PDFsam Basic and PDF24 Creator are free and work offline. See how to combine PDF files and how to extract pages from a PDF.
Compressing. Submission portals routinely cap uploads at 5 or 10 MB, and a scanned appendix will blow past that. The compressor runs in your browser; scanned documents typically shrink dramatically with no visible loss.
OCR. A scanned chapter you cannot search is much less useful than one you can. Google Drive does this free — upload and open with Google Docs — and OCRmyPDF does it locally if you would rather not upload. See how to make a PDF searchable.
Conversion. Word, Google Docs, and LibreOffice all convert PDFs to editable documents free. See how to convert a PDF to Word.
Things worth being careful about
Never upload confidential material to a random web tool. Exam papers under embargo, unpublished research, interview transcripts, participant data covered by an ethics approval — these carry obligations, and "I used a free website" is not a defence if data protection rules apply. Use local tools or client-side ones. See privacy in browser PDF editing.
Check your submission before the deadline, not at it. Open the exported file in a different application and confirm it looks right. Portals reject files for size limits, page counts, and corruption, and discovering that at 23:55 is a specific kind of misery.
Keep your annotated copies backed up. A term of marginal notes on twenty papers is real work. Sync them to cloud storage.
Verify OCR figures. Recognition errors are plausible-looking — rn for m, 1 for l — and pass spellcheck. If you are quoting numbers from a scanned source, check them against the image.
Name files so you can find them. 2026-03-14_Foucault_discipline-punish_ch2.pdf beats download.pdf when you are hunting for a quotation the night before a deadline. See PDF document management tips.
The short version
Read and annotate in Preview, your browser, or a reference manager. Fill forms and sign in the browser. Restructure with Preview or PDFsam. Compress before submitting. Check your institutional licences first. Total cost: nothing.
