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[email protected]The current build accepts PDFs; images (PNG, JPG, GIF, WEBP, BMP, HEIC/HEIF, SVG, TIFF); Word documents (DOCX, RTF); spreadsheets (XLSX, XLS, XLSM, CSV); plain text (TXT, LOG); rendered Markdown (MD); and source code or data files (JSON, XML, YAML, JS, TS, Python, Swift, C, C++, Go, Rust, Ruby, Java, Kotlin, PHP, SQL, HTML, CSS, SCSS, Bash, TOML, INI, ENV). New formats get added regularly — let me know what you'd like to see supported.
No. All conversion happens in your browser (web version) or on your device (native app). Files never leave your device. See the Privacy Policy for the full details.
For most file types, conversion is near-instant. Two exceptions are worth knowing about:
If the progress indicator stops moving for more than a minute, refresh the page and try with fewer files.
The most common causes:
Hover the status chip on the failed item in the queue for the specific error message.
Yes, on desktop. Drag any file in the queue by its handle (the dotted icon on the left) to reorder. The final PDF preserves the order shown.
On iPhone and iPad, drag reorder isn't available in Safari — touch devices don't fire the underlying drag events the browser needs. The simplest workaround is to remove the misordered file with the ✕ button and re-add it in the position you want. The native iOS app (coming soon) will support full drag reorder.
Yes. Click the rotation chip next to any file to switch between auto, portrait, and landscape. The choice persists until you remove the file. Click the eye icon to preview each file at its current orientation before merging.
For PDFs, yes — they're embedded byte-for-byte with no re-rendering. For images, yes — pixels are preserved. For Word documents and spreadsheets, the layout is rendered into the PDF and may differ slightly from how Word or Excel would print it natively (fonts substitute to system fonts, and complex formulas show their computed values). For the native iOS/iPadOS/macOS app (coming soon), Word and Excel rendering uses Apple's own document engine for higher fidelity.
Yes, after your first visit. The web app installs as a Progressive Web App on iOS and Android home screens, and once installed it works without an internet connection. On the desktop, you can also use it offline by re-loading the same browser tab.
Open the web app in Safari, tap the share button at the bottom of the screen, scroll down, and tap "Add to Home Screen." It will appear with the Folio icon and run full-screen like a native app.
The native iPhone, iPad, and Mac version is in development and will launch on the Apple App Store. It will include OCR, document encryption, watermarks, signatures, iCloud sync, Share Sheet integration, and Shortcuts support — features that aren't possible in a browser. Email [email protected] to be notified at launch.
The web version is free, forever. The native App Store version is a one-time paid purchase (no subscription) that unlocks the advanced features above.
Email [email protected] with the format or workflow you'd like to see. Every feature request actually gets read — most updates start that way.