The Best Free Alternatives to Adobe Acrobat
Most people paying for Acrobat Pro use three of its features. Here is how to get those three for nothing — and the honest point at which free tools run out of road.
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- For reading, signing and commenting, Adobe's own free Acrobat Reader is still the most compatible option — you do not need Pro.
- For merging, splitting, compressing and converting, Stirling PDF and PDF24 cover almost everything Pro does, at no cost.
- For editing existing text inside a PDF, LibreOffice Draw is the only genuinely free desktop option, and it is imperfect.
- Free tiers of web tools are capped by file count or size. Desktop tools have no cap and never upload your documents.
Before you look for free alternatives to Adobe Acrobat, it is worth saying who should not bother. Acrobat Pro is priced as professional software because, for a specific group of people, it is professional software. If your job involves redaction with an audit trail, PDF/A archival compliance, or accessibility tagging that has to survive a legal review, keep paying for it. This guide is not for you.
Everyone else is in a different situation. They subscribed because they needed to merge two documents, sign a lease, or shrink a file small enough to email — and Acrobat was the name they knew. That is a monthly subscription for three tasks that free software has handled well for years.
Below is what actually replaces it, organised by the job you are trying to do rather than by product. The honest limits of each tool are included, because a recommendation without limits is just an advertisement — and stating limits is part of our editorial standards.
What Acrobat Pro does that the free Reader does not
Before replacing anything, it helps to know what you are replacing. Adobe Acrobat Reader — free, no subscription — already covers a surprising amount:
- Viewing and printing any PDF
- Filling in interactive form fields
- Adding comments, highlights and sticky notes
- Applying an electronic signature
- Basic page navigation, search and bookmarks
The paid Pro tier adds editing of existing page content, OCR on scanned documents, page reordering and extraction, compression, format conversion, true redaction, and comparison between two versions of a file.
That second list is the one we need to cover. Every item on it has a free equivalent, though not always in the same place.
Stirling PDF — the closest thing to a free Acrobat Pro
Stirling PDF is an open-source, self-hosted toolkit that bundles more than fifty PDF operations behind a web interface you run yourself. Merge, split, rotate, compress, convert to and from images and Office formats, add or remove passwords, extract pages, apply OCR, overlay watermarks — the coverage is genuinely broad.
The critical detail is self-hosted. You run it on your own machine or your own server, usually through Docker, which means your documents never travel to someone else’s infrastructure. For anyone handling contracts, invoices or client files, that single property matters more than any feature.
Where it stops: it will not edit existing text inside a page the way Acrobat Pro does, and setup assumes you are comfortable running a Docker container. If the phrase “docker compose up” means nothing to you, start with the next entry instead.
PDF24 — the easiest desktop option on Windows
PDF24 Creator is a free Windows application from a German developer that installs as both a standalone toolbox and a virtual printer. The toolbox covers merging, splitting, compressing, converting, OCR and password handling. The virtual printer means any application that can print can produce a PDF.
It is free without a trial period, without a watermark and without an account. There is also a web version, but the desktop application is the one worth installing — it processes files locally.
Where it stops: Windows only, and the interface is functional rather than elegant. It does the work; it will not impress anyone.
LibreOffice Draw — the only free desktop text editor for PDFs
This is the one people miss, because nothing about the name suggests it. LibreOffice Draw opens a PDF directly, treats each page as a canvas of editable objects, and lets you click into a paragraph and retype it.
For a simple, text-based document — a letter, an invoice, a form with a typo — it works. You correct the text, then export back to PDF.
Where it stops: and this is a real limitation, not a formality. Complex layouts break. Text boxes fragment into separate objects that do not reflow. If the original font is not installed on your system, the substitution will shift your spacing. Scanned documents are images, so there is nothing to edit until you run OCR first. Treat it as a repair tool for small fixes, not a layout editor.
Sejda and Smallpdf — good web tools, with a meter running
Sejda and Smallpdf are polished browser-based services that handle the common operations well, with free tiers limited by number of tasks per hour, file size, or page count. The exact limits change, so check the current ones on the site rather than trusting any article — including this one.
They are genuinely convenient for a one-off job on a non-sensitive file. Use them that way and they are excellent.
Where they stop: the free tier is a funnel toward the paid tier, by design. And every file you process is a file you uploaded. For anything confidential, use a desktop tool.
What already ships with your computer
Worth checking before you install anything at all.
macOS Preview merges PDFs by dragging thumbnails between windows, reorders and deletes pages, rotates, exports at reduced size, and signs documents using a signature captured through the trackpad or camera. Apple documents the whole workflow in its Preview user guide. For a large share of everyday PDF work on a Mac, that is the whole job done with zero installs.
Windows has no equivalent built-in editor, though Edge handles viewing, annotation and form filling competently, and “Microsoft Print to PDF” produces PDFs from any application.
Linux desktops usually ship Okular or Evince for viewing and annotation, with qpdf and Ghostscript available from any package manager for scripted merging, splitting and compression.
Quick comparison
| Task | Best free option | Runs locally | Notes |
|---|---|---|---|
| Read, annotate, sign | Acrobat Reader / Preview / Edge | Yes | No subscription needed for any of this |
| Merge, split, reorder | Stirling PDF, PDF24, PDFsam Basic | Yes | PDFsam Basic is tiny and does this one job well |
| Compress | PDF24, Ghostscript | Yes | Ghostscript gives the finest control, via command line |
| Convert to/from Office | Stirling PDF, LibreOffice | Yes | Fidelity depends on how the PDF was produced |
| Edit existing text | LibreOffice Draw | Yes | Works on simple documents; expect friction on complex ones |
| OCR a scan | Stirling PDF, PDF24, Tesseract | Yes | Accuracy depends on scan quality more than on the tool |
| Password add/remove | Stirling PDF, PDF24, qpdf | Yes | Removing a password you do not own is a different matter |
| True redaction | No solid free option | — | See below |
The one thing you should still pay for
Redaction. Not the kind where you draw a black rectangle over a name — that leaves the text underneath, retrievable by anyone who selects and copies it. That mistake has produced real, documented disclosures of confidential information in court filings and government releases.
Proper redaction removes the underlying content and the metadata that references it. Acrobat Pro does this and produces a record of it. Free tools either do not offer it or offer something that looks like it, which is worse than not offering it at all.
If your work involves redacting documents that carry legal or personal consequences, that single feature justifies the subscription. For everything else on this page, it does not.
How to choose in one minute
Ask two questions.
Is the document sensitive? If yes, your options are desktop or self-hosted only: Stirling PDF, PDF24, LibreOffice Draw, Preview, or the command-line tools. Nothing gets uploaded.
Is this a one-off or a routine? For a one-off on a harmless file, a web tool is the fastest route and you can close the tab afterwards. For anything you will do weekly, install a desktop tool once and stop thinking about it.
For most people the answer lands in the same place: install PDF24 on Windows or use Preview on a Mac, add LibreOffice for the occasional text fix, and cancel the subscription.
We apply the same test — what does it actually do, and where does it stop — across our other software and tools guides.
Frequently asked questions
Is there a completely free version of Adobe Acrobat?
Adobe Acrobat Reader is free permanently and handles viewing, annotating, filling forms and signing. Acrobat Pro — the version that edits page content, performs OCR and redacts — is subscription-only. There is no free tier of Pro, and any site offering a free 'full' download of it is distributing pirated or modified software.
Can I edit the text inside a PDF for free?
Yes, but with caveats. LibreOffice Draw opens a PDF and lets you click into text blocks and retype them. It works best on simple, text-based documents. On complex layouts, scanned pages or unusual fonts, the reflow can break. For heavy editing of a document you own, editing the original source file and re-exporting is always cleaner.
Are free online PDF tools safe to use?
It depends entirely on the document. Uploading a marketing brochure is low risk; uploading a signed contract, medical record or anything with personal data means handing that file to a third party. For sensitive documents use a desktop or self-hosted tool so the file never leaves your machine.
What is the best free PDF tool for Mac?
The built-in Preview app already merges, reorders, rotates, exports and signs PDFs, which covers most everyday needs without installing anything. For tasks it does not handle — compression, OCR, batch operations — add a desktop tool such as PDFgear or a self-hosted Stirling PDF instance.
Do free PDF tools add watermarks?
Open-source desktop tools such as Stirling PDF, PDF24, LibreOffice Draw and PDFsam Basic do not. Some freemium web services do add a watermark or restrict output on the free tier, so check the output of a test file before you process anything that matters.
