"Free PDF editor" covers tools that do wildly different jobs. Some let you write on a page; some restructure documents; one of them is a full professional application that happens to have a free tier. Picking well means knowing which job you have.
A disclosure before the list: we make one of these tools. We have tried to write the comparison we would want to read, which means saying plainly where the others are better — and several of them are, at several things. Our editorial policy sets out the rules we hold ourselves to here.
First, work out which job you have
Annotating and signing. Adding a signature, text, a date, a tick, a highlight, or a comment on top of an existing page. This is most people, most of the time, and nearly every free tool handles it.
Restructuring. Merging, splitting, reordering, rotating, deleting pages, compressing. Mechanical operations on the document as a whole. Widely available free; watch for daily task limits.
Rewriting existing text. Changing words already printed on the page. This is the hard one — see why PDFs resist editing — and free tools either do not offer it or do it imperfectly.
Conversion and OCR. Turning a PDF into Word or Excel, or making a scan searchable. Compute-heavy, so almost always server-side, and free tiers are usually capped.
If your job is the first, almost anything works and you should optimise for speed and privacy. If it is the third or fourth, most free tools will disappoint you and it is better to know that now.
1. Docento.app — annotating and signing, privately
Best for: signing and marking up documents you would rather not upload.
Docento.app runs entirely in your browser. Your file is read by your own machine, edited locally, and exported locally; there is no upload endpoint. No account, no watermark, no daily cap. Tools cover signatures (draw, type, or upload), text, stamps, images, and annotations, plus a separate compressor.
Where it wins: privacy is structural rather than promised — you can verify it by disconnecting from the internet mid-edit and watching everything keep working. No sign-up, no limits, no waiting on uploads.
Where it loses: we do not do OCR, format conversion, or true text rewriting, and we do not have a desktop app. If you need to turn a scanned contract into an editable Word file, we are the wrong tool and one of the others below is the right one.
2. Smallpdf — the broad toolkit
Best for: having one place that does most PDF operations.
Smallpdf covers a wide range of tasks — compress, convert, merge, split, sign, OCR — behind a clean, approachable interface. It is the tool to reach for when your needs vary week to week and you would rather not remember five different sites.
Where it wins: breadth and polish. Conversion quality is good, and the interface makes it obvious what each tool does.
Where it loses: the free tier is limited to a small number of documents per day, and processing is server-side, so your file is uploaded. Check their current retention policy if the document is sensitive.
3. Sejda — the generous free tier
Best for: occasional restructuring work without hitting a wall immediately.
Sejda offers a genuinely large toolset with a free allowance that tends to be more forgiving than most competitors', metered per hour with page and file-size ceilings. It also offers real text editing on many documents, which is unusual at this price.
Where it wins: the free tier goes further than most, and the task-oriented interface is easy to navigate. Its text-editing attempt is better than you would expect for free.
Where it loses: files are uploaded and processed on their servers. Text editing degrades on complex layouts and unusual fonts, as it does everywhere.
4. PDF-XChange Editor — the powerful desktop option
Best for: Windows users doing serious, repeated PDF work.
A mature Windows desktop application whose free version includes a large amount of genuinely professional functionality: annotation, form filling, OCR of scanned pages, and real editing tools. Because it runs on your machine, nothing is uploaded.
Where it wins: capability. This is the closest a free tool gets to Acrobat, and it is fast on large documents that make browser tools struggle.
Where it loses: Windows only, and it is an installed application rather than something you open in a tab. Some features are reserved for the paid version and will stamp a watermark on output if used — check before relying on one.
5. iLovePDF — the mobile-friendly suite
Best for: people who move between phone and computer.
A broad toolset comparable to Smallpdf's, with well-regarded mobile apps that keep the same workflow across devices. Merging, splitting, converting, compressing, and signing are all covered.
Where it wins: the mobile experience is better than most competitors', which matters if you often need to sign something from your phone.
Where it loses: server-side, with free-tier limits on task frequency and file size.
The honourable mention: what you already have
Before installing anything, check your own machine. macOS Preview handles signing, annotation, page reordering, and rotation, and it is already installed — for Mac users this covers a surprising share of everyday tasks. Modern Chrome, Edge, and Firefox can fill and save form fields and annotate PDFs directly in a tab. Your operating system's "Print to PDF" flattens a document, strips password protection you can already open, and reduces file size, all without a third-party tool.
A striking number of people install software to do something their computer already does.
Choosing in one line
If you are signing or marking up something private, use a client-side tool and skip the upload. If you need conversion or OCR, use one of the server-side suites and accept the trade. If you do this work daily on Windows, install PDF-XChange. And check Preview or your browser first — the fastest tool is often the one already open.
One caveat on all of the above: free-tier limits and feature boundaries change without notice, and were last reviewed for this article in July 2026. Verify current limits before depending on one. If we have got something wrong, tell us and we will fix it.
