ChromeOS is basically Chrome. Open a PDF on a Chromebook and you get a viewer that does nothing but view. No annotation, no signing, no editing. Schools and students using Chromebooks for everything else hit this wall constantly.
The good news: Chrome can run Flint, which is everything ChromeOS forgot.
What ChromeOS doesn't ship
ChromeOS has no built-in PDF editor. No Preview, no Edge-style annotation tools, no equivalent of Apple's Markup. The viewer shows PDFs and that's it. The Play Store has options (since Chromebooks run Android apps), but they're often heavy and most are paid.
Flint runs in Chrome itself — same browser the PDF opened in. No install, no Play Store dance.
The flow
Save the PDF to Files (or open from Drive). Go to flintpdf.com in a new tab. Drag the PDF into the editor or use the file picker. Edit text inline, sign, merge, compress, all in browser. Download back to Files.
For students: works on any school Chromebook regardless of admin restrictions, since it's web-based and doesn't require install permissions.
Stylus support on Chromebooks
Chromebooks with a stylus (Pixelbook Pen, Lenovo Duet pen, USI styluses) work in Flint's signature pad. Pen pressure where supported. Useful for signing PDFs by hand on touchscreen Chromebooks.
Cloud-first workflow
Most Chromebook PDFs live in Drive. Open Drive in one tab, Flint in another, drag files across. Saved PDFs can upload back to Drive in the same browser session. The Chromebook ecosystem and Flint match each other's web-first philosophy.
FAQ
Why doesn't ChromeOS have a PDF editor?
Google's PDF strategy is browser-only — view in Chrome, edit through web apps. They don't ship native editing because the design assumes the web handles it. Annoying when you want a quick edit; once you find a good web tool like Flint, it makes sense.
Will Flint work on school Chromebooks?
Yes, in most cases. It's a web app that loads in Chrome, requires no install, and doesn't need admin permissions. Schools that block flintpdf.com specifically would be the only exception (rare).
Can I use Android apps from the Play Store instead?
Yes, Chromebooks run Android apps. But they're heavier than browser tools, often paid, and require install permissions some schools block. Browser is the more universal answer.
ChromeOS does one thing well — runs the web. Run Flint in Chrome and edit your PDF.