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How to Use the In-App Document Viewer on iOS: Multi-Tab PDF, Excel, Word & Multitasking

play_circle Official Video Tip #473

Productivity & File Management

How to Use the In-App Document Viewer on iOS: Multi-Tab PDF, Excel, Word & Multitasking

Review contracts and spreadsheets without losing your chat rhythm. Discover how Telegram on iOS integrates native document viewing (.pdf, .xls, .docx) directly into the multi-tab in-app browser—enabling instant background collapsing, simultaneous chatting, and zero file switching friction.

description Official demonstration: Opening a PDF invoice inside Telegram on iOS, swiping down to minimize it to the multi-tab dock, continuing to reply to a coworker, and tapping the tab bar to resume reviewing.

picture_as_pdf

Native PDF, Excel & Word

Renders complex vector PDFs, financial Excel workbooks (.xlsx), and Word documents (.docx) with complete layout fidelity.

splitscreen

Multi-Tab Docking

Keep multiple documents, web links, and mini apps open simultaneously in the bottom floating navigation bar.

chat

Zero Chat Interruption

Never lose your place in high-velocity group conversations while reviewing detailed file attachments.

terminal IOS QUICKLOOK & WEBKIT ARCHITECTURE

How Telegram iOS Handles Documents in WebKit Containers

A technical overview of Apple's QuickLook framework integrated into Telegram's sandboxed multi-tab browser.

iOS Browser Multi-Tab Document Container Logic

// Intercepting supported MIME types in Telegram iOS Browser
let supportedDocMimes = [
    "application/pdf",
    "application/vnd.ms-excel",
    "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    "application/msword",
    "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
]

// Instantiating sandboxed QuickLook Controller inside Browser Tab
if supportedDocMimes.contains(mimeType) {
    let docTab = BrowserTab(url: localFileURL, type: .document)
    browserController.addTab(docTab)
    browserController.presentTab(docTab)
}

// Minimizing to Floating Dock
browserController.minimizeToBottomBar(duration: 0.25, damping: 0.8)

Instead of launching external apps or modal sheets that lock the user interface, Telegram on iOS instantiates Apple's hardware-accelerated QuickLook preview controller inside an isolated BrowserTab container. This architectural integration allows files to share the browser's gesture engine—enabling seamless downward swipe minimizing, tab switching, and state preservation across memory pressure cycles.

tab

iOS Document Viewer & Multi-Tab Simulator

Simulate opening documents inside Telegram, collapsing them into the bottom bar, and switching between active files.

picture_as_pdf Contract_Agreement.pdf

iOS QuickLook

Previewing Contract_Agreement.pdf (Page 1 of 8)

Full vector PDF rendering active. Swipe down to collapse and reply to client inquiries in chat.

checklist STEP-BY-STEP GUIDE

How to Multitask with Documents on iOS

Follow these simple gestures inside Telegram for iPhone and iPad.

1

Tap Any Document Attachment

Tap on a received PDF, Excel sheet, or Word file. The document opens smoothly in a dedicated browser tab.

2

Swipe Down on the Header Bar

Swipe down from the top title bar to dock the document at the bottom of your screen. You can browse other chats and send voice notes freely.

3

Tap the Dock to Resume

Tap the floating bottom tab at any time to instantly restore the document right where you left off.

help_center FREQUENTLY ASKED QUESTIONS

Document Viewer FAQ

Answers regarding supported formats, search within files, and Android parity.

Which document file types are supported natively?

On iOS, the viewer natively supports .pdf, .doc, .docx, .xls, .xlsx, .ppt, .pptx, and plain text files.

Can I search for text inside long PDF documents?

Yes! Tap the magnifying glass search icon inside the viewer header to highlight keywords and jump across pages instantly.

Can I share the document directly to another chat while viewing?

Yes. The three-dot menu (•••) provides one-tap forwarding, printing via AirPrint, and saving to your Files app.

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