Private · Offline · Yours

Your files. One cozy nest.

Now available on iPhone, iPad and Mac.

iPhone · iPad · Mac

A private, offline library for HTML, Markdown, PDF, Word, JSON and text — on iPhone, iPad and Mac.

Meet Viby Owl and his nest

Ask an AI for a tool.
Then actually keep it.

AI chat tools hand you working single-file HTML now — calculators, dashboards, planners, generators. Most apps show you the source code. BuboHub runs the page.

Open it. Use it fullscreen. Then edit it — visually, or straight in the source. Buttons work. Forms work. Sliders slide. If the page has a print button, it prints.

A place for everything

Shelves, not folders

Every file type gets its own shelf: HTML, Markdown, DOCX, PDF, JSON and text. Nothing to set up. Add a file and it lands where it belongs, with a live count on the tab.

Then make categories — little baskets that cut across every shelf. School. Work. Weekend chaos. Mix a PDF, three notes and an HTML tool in one place.

Viby organizing gold HTML, Markdown, text, Word, PDF and JSON file tokens.

Built around your library

Everything in its place.

Private. Portable. At home on all three.

Eight tabs, zero setup

HTML, Markdown, Word, PDF, JSON, text, File Explorer and Categories — each right where it belongs.

HTML that runs

Buttons, forms, links, sliders and print controls work. Your file opens as a real page, not a source dump.

Edit without a laptop

Visual editor and source editor for HTML. Markdown, text and JSON edit inline.

Preview before you commit

Browse folders and preview what's there, including videos. Nothing is copied until you choose Add to Hub.

Private in-app browser

Links open in a private viewer with no history kept when it closes. You can use your external browser instead.

One file, whole library

Save everything as a single `.bubohub` backup. Portable, and yours.

Made for all three

iPhone, iPad and Mac. Four themes, adjustable HTML zoom and library-wide search.

Privacy, by architecture

No account. No cloud. No subscription.

BuboHub has no login and no BuboHub cloud. Your library lives on your device. There are no ads, analytics or third-party tracking.

Read the full privacy policy

Viby pointing to a gold file token marked HTML, Markdown, Word and PDF.

Portable on purpose

One file holds the whole nest

Save everything as a single .bubohub file — your documents, shelves and categories, in one portable file you keep.

Opening a .bubohub restores that backup and replaces whatever is currently in the nest, so keep your latest one somewhere safe before you switch devices. Folder shortcuts from File Explorer stay on the device that made them and don't travel in the backup.

There's no cloud copy to fall back on — that's the trade-off for having no cloud at all. Export takes one tap. Do it now and then.