Use Cloud PDF in your browser

Updated November 10, 2026

Cloud PDF by MyCloudSuites and Cloud Docs also run in your web browser at mycloudsuites.com/app, free, with nothing to install. They’re the same apps as the desktop version, with a few tools that only the desktop app can do.

The other apps in your browser

Cloud Sheets, Cloud Slides and Cloud Books also run in your browser, each at its own address, with the same free account:

Your apps lists every app you can open in your browser. The rest of this article is about Cloud PDF and Cloud Docs.

What you need

A current version of Google Chrome or Microsoft Edge on a desktop or laptop computer. Other browsers aren’t supported yet.
A free MyCloudSuites account. When you open the app you’re asked to sign in first, or to create an account. Then the app opens by itself.

Your files stay on your computer

The browser opens files from your computer and saves them back there, just like the desktop app. Nothing is uploaded to MyCloudSuites unless you choose Save to MyCloudSuites (MyCloudSuites Plus); the only other exception is the pages you choose to share with the AI assistant. When you save, your browser may ask you to allow Cloud PDF to save changes to the file.

What works in the browser

Most of Cloud PDF and Cloud Docs works the same as on the desktop, including:

viewing, editing text and images, and organizing pages
filling in and signing forms with Fill & Sign, and creating forms
comments, highlights, stamps and redaction
password-protected PDFs: opening them with their password, changing what their permissions allow, Protect with Password and Remove Security
signing with a digital ID from a .pfx or .p12 file, or one you create in the browser (it’s saved as a .pfx file for you to keep), and checking the signatures in a PDF
timestamping a signature or a document, adding long-term validation information, and checking signatures online (revocation checks)
the AI assistant, with your own Claude API key
recognizing text in scanned pages (OCR)
writing and editing Word documents in Cloud Docs, with track changes and comments
Check Spelling in Cloud Docs and in comments, in US or British English, including adding words to the dictionary
exporting a PDF to Excel or PowerPoint
making a PDF from any file: open it, drop it on the window, or choose File › Create PDF from File. Word documents, pictures, text, email, video and sound convert in the browser; spreadsheets and slides are made from their cells and from each slide’s text and pictures, with the original attached (their full design needs the desktop app with Microsoft Office or LibreOffice). A file that can’t be shown as pages becomes a PDF with the file attached.
saving a Word document as a PDF (Cloud Docs’ Save as PDF and Open as PDF)

Recognizing text: the language files are downloaded the first time you use each language (a few megabytes, from jsDelivr, a public file server), then your browser keeps them. Only the language data is downloaded; your document isn’t sent anywhere.

Checking spelling: the English dictionary (about half a megabyte) is downloaded from MyCloudSuites the first time spelling is checked, then used for the rest of your visit. Your text isn’t sent anywhere. Other languages need the desktop app for now; choose US or British English in Preferences › Language.

Timestamps and online checks: these work while you’re signed in. Your browser can’t reach a timestamp server or a certificate authority by itself, so MyCloudSuites’ server passes the request on and brings back the answer. It sees the certificate and a fingerprint (a hash) of the document, never the document itself, and keeps no copy. Timestamp servers that need a user name and password work only in the desktop app.

The AI assistant: it works with your own Claude API key from Anthropic, entered in Preferences. The key is kept in this browser tab only, until you close it, unless you choose Remember on this browser; then a copy is kept in this browser, encrypted. It’s never sent to MyCloudSuites and never synced. Your questions, and the pages you choose to share, go straight from your browser to Anthropic. Signing in with ChatGPT needs the desktop app.

Printing PDFs: choosing Print opens your browser’s own print dialog, where you pick the printer and its settings. Printing a Word document needs the desktop app.

Only in the desktop app

These need the desktop app, because a browser can’t do them:

making a PDF from a web page’s address (following its links) or from the clipboard, and exporting a PDF to Word or RTF
a spreadsheet’s or a presentation’s PDF in its full design (with Microsoft Office or LibreOffice)
printing a Word document
scanning paper documents
signing or opening files with a digital ID from the Windows certificate store or the macOS keychain, including smart cards
emailing through Outlook or your mail program: sending a document, sending a form with Distribute Form, mail merge, and collecting the answers with Track Responses
submitting a filled-in form to the address the form names
saved search indexes in Advanced Search, and links in a PDF that open another file
opening a document in a separate window, or splitting a tab into a window of its own
connecting AI apps such as Claude Desktop, and remote access for AI apps, and signing in with ChatGPT for the AI assistant
timestamp servers that need a user name and password
automatic updates, and making Cloud PDF your default PDF app

If you choose one of these in the browser, Cloud PDF tells you it’s available in the desktop app. Download the desktop app free.

The browser also can’t use some things installed on your computer, so Cloud PDF does without them:

colour profiles you’ve installed aren’t offered
Chinese, Japanese and Korean fonts: when a PDF uses one it doesn’t include, the text falls back to another font
map datum grids: maps on older datums such as NAD27 use an average shift instead, so positions on them are less precise
fonts for signature appearances: a visible signature’s text is drawn in Liberation Sans; letters it doesn’t have (such as Arabic, Chinese, Japanese or Korean) show as “?”, and your typed name isn’t drawn in a handwriting font

Coming to the browser later

For now these are in the desktop app only:

protecting a PDF with certificates, and opening PDFs protected that way
checking signatures against the EU Trusted Lists

Two more things to know:

Digital IDs stay in your browser tab only. Open your .pfx or .p12 file with its password in Tools › Digital IDs when you want to sign. Cloud PDF keeps it only until you close the tab, and never stores it in the browser. Signatures are checked in your browser against the certificates you trust (Tools › Trusted Certificates); a signature from anyone else shows as not trusted, issuer unknown. Timestamps and online revocation checks work while you’re signed in.
Password-protected PDFs work as on the desktop. Enter the password to open one. With its open password you can do what its permissions allow; with its permissions password, anything, including removing its security. Your changes are saved with the same protection. PDFs protected with certificates need the desktop app.

If something goes wrong

The page says Cloud PDF online needs a current Chrome or Edge. Update Chrome or Edge to the latest version, or open the page in one of them.
You keep being asked to sign in. Make sure your browser allows cookies for mycloudsuites.com, then sign in again.
“Couldn’t reach MyCloudSuites”. Check your internet connection and choose Retry. Signing in needs the internet; your files don’t.