Edit PDFs on a Chromebook, pure browser
Chromebooks run no desktop apps, so every downloadable PDF editor is useless on one. Here is what the built-in Gallery viewer does and how to edit the text instead.
There is no desktop app to install, which is the whole problem
ChromeOS runs no .exe and no .dmg. Adobe has never shipped an Acrobat build for it. So every search result that says download our PDF editor is dead on arrival, and that is exactly why this query gets typed.
The thing people conclude from that is wrong, though. A Chromebook is not short of a PDF editor. It is short of an installable one, and editing a PDF does not actually need an install.
The Android and Linux escape hatches are usually locked
A personal Chromebook can install Android apps from the Play Store, and can switch on the Linux development environment and run desktop Linux software inside it. On a school or company Chromebook the administrator has almost always turned both off, along with sideloading and developer mode. There is nothing you can do about that from your account, and it is the reason a Play Store recommendation is no help to most people asking this. A web page needs no permission from anyone.
What the built-in viewer already does
ChromeOS opens PDFs in the Gallery app, and it does more than people expect. Pen and highlighter markup. Filling in real form fields. Rotating a page and deleting a page, then saving the result. For a quick sign-and-return, you may not need anything else at all.
Where it stops is the same place every viewer stops: it cannot change text that is already on the page. There is no way to click a printed line and retype it, no find and replace, and no way to merge two documents.
How to edit a PDF on a Chromebook
Open FileHook in Chrome and drop the PDF on the upload card, or click it to browse. The ChromeOS Files app shows My files with Downloads inside it, your mounted Google Drive, Play files if Android apps are on, and any USB stick or SD card. You can pick from any of them.
Click a line and retype it. The document's own fonts are reused, so the corrected line matches its neighbours. Everything else is in the toolbar down the side: add text, whiteout, form fields, signatures, highlights, shapes, images, links, find and replace, and page reordering.
Two viewers, and knowing which one you are in
ChromeOS shows PDFs in two different places and they behave differently, which is a common source of confusion. Click a PDF link on a website and Chrome's own built-in viewer opens it in the tab: zoom, rotate, print, download, nothing else. Open the same file from the Files app and it goes to Gallery instead, which is where the markup and form filling live.
There is also Print to PDF on ChromeOS: Control P, then set the destination to Save as PDF. Like everywhere else it creates PDFs rather than editing them, and it drops form fields and links on the way through.
The file saves back into Files
Downloads land in My files, Downloads by default. If you set Chrome's download location to your Google Drive folder, the finished PDF goes straight there instead, which is worth doing on a Chromebook with 32 GB of storage. Either way it shows up in the Files app immediately and can be attached to Gmail from there.
Add it to the shelf without the Play Store
Chrome shows an install button in the address bar. Click it and FileHook is added to the launcher and can be pinned to the shelf, opening in its own window with no tab strip. Nothing is installed to the system and no administrator approval is involved, so this works on a managed device where the Play Store does not.
Working without a connection
The editing itself needs no network. Once the page is open, your PDF is read off the Chromebook, the changes happen in the tab, and the finished file is assembled there too. The page does have to load once, so a first visit on a plane will not work, and we would not tell you to plan a lesson around offline behaviour. What you can rely on is that a dropped connection halfway through an edit does not lose your document.
School and work Chromebooks, and the honest limit
Nothing is uploaded for an edit and no account is created, which is the answer to most school policy questions. If the page will not load at all, that is the network filter rather than the Chromebook, and it needs the site allowed rather than anything installed. The genuine limit is hardware: budget Chromebooks ship with 4 GB of memory and a low-power chip, and since your machine renders every page, a big scanned PDF is slow on one. Free use covers 10 finished files a day across every tool, resetting at midnight UTC, with files up to 50 MB.
FAQ
What is the best free PDF editor for a Chromebook?
One that never asks to be installed, since ChromeOS cannot install desktop software anyway. FileHook edits the real text in the browser, exports with no watermark, and needs no admin approval.
Can I install Acrobat on a Chromebook?
There is no ChromeOS build of Acrobat. The Android version from the Play Store is a reader on a subscription, and most managed Chromebooks have the Play Store switched off in any case.
Can the Chromebook Files app edit a PDF?
The Gallery viewer it opens handles markup, form fields, page rotation and page deletion. Changing text that is already printed on the page is outside what it does.
Does this work on a managed school Chromebook?
Nothing installs, so there is no admin approval step. The only thing that stops it is a network filter blocking the site, which a teacher or IT admin can allow.
Can I use it offline?
The editing runs locally once the page has loaded, so a dropped connection mid-edit is harmless. The page still has to load once, so treat offline as a nice fallback rather than a feature to plan around.
Where does the edited file end up?
In My files, Downloads, unless you pointed Chrome's download location at your Google Drive folder. It appears in the Files app right away either way.