Your digital comics — organized at last.

Digital Longbox scans, identifies, and organizes your personal CBZ, CBR, and PDF collection — then streams to the Longbox Reader app.

🖥️ Mac App Store 🪟 Microsoft Store 📱 App Store (iPad) 🤖 Google Play
Two apps, one collection

Built to work together

Digital Longbox runs on your desktop and does the heavy lifting: scanning, identifying, and organizing. Longbox Reader reads whatever Digital Longbox is holding — or what you upload (or download) to the app.

macOS · Windows

Digital Longbox

Your comic collection manager

Point Digital Longbox at the folders where your comics live. It identifies series and issue numbers, lets you fill in and lock the metadata that matters to you, and reads everything in a clean full-screen viewer. Turn on server mode and your whole library becomes available to Longbox Reader over your home Wi-Fi — no transferring files by hand.

  • Automatic series & issue detection for CBZ, CBR, and PDF
  • Metadata editing, cover art, and lockable issue records
  • Built-in local server for streaming to mobile
iPad · Android

Longbox Reader

Read anywhere, home or away

Longbox Reader is a comfortable, distraction-free comic viewer for your tablet. Upload comics straight to the app, or connect to Digital Longbox running on your home network to browse your entire desktop library — streaming on demand or downloaded for offline reading on the go.

  • Direct comic upload, stored locally on your device
  • Connects to your Digital Longbox server over Wi-Fi
  • Download individual issues for offline reading
How it fits together

From messy folder to organized library

1

Add your libraries

Point Digital Longbox at the folders where your CBZ, CBR, and PDF files already live. It scans them in place — nothing is moved or converted.

2

Let it identify your comics

Series, issue numbers, and metadata are matched automatically. Review, edit, and lock anything you want to keep exactly as-is.

3

Read anywhere

Read right on your desktop, or turn on server mode and open Longbox Reader on your iPad or phone to browse, stream, or download for the road.

Need a hand?

Support & setup guides

Step-by-step guides for organizing your collection, running your first scan, and connecting the companion apps.

Digital Longbox Support

Organizing folders, adding libraries, running your first scan, and locking metadata.

Open guide

Longbox Reader Support

Uploading comics, connecting to your home server, and reading offline.

Open guide

Report a Bug or Request a Feature

Found something broken, or have an idea for either app? Let us know.

Report an Issue
Why we built this

Picking up where ComicBookLover left off

ComicBookLover was one of the first comic readers built for the iPad — simple viewing tools and a genuinely logical way to organize a collection so you always knew what you had. When it stopped working with iOS 8, nothing that came after quite captured the same spirit.

Longbox Reader started as a side project in 2017, stalled when the original technology choice became a wall rather than a foundation. In 2022, the focus shifted to what would become Digital Longbox — a proper scanner and metadata editor for a local comic collection — and a working prototype came together before performance problems stalled it again. Work resumed in 2025 and led to the apps you can download today.

Partway through that second stall, in 2024, YACReader came up — a free, open-source comic manager and reader that's been refined since 2009 and is considerably more mature than what's here today. It came close to ending the project outright. What settled it was a genuine difference in how the two handle a library, not a claim to do it better: YACReader mirrors your actual folder structure, so you browse nested folders — however deep, however you've organized them — much like a file manager. Digital Longbox takes a different approach on purpose: one folder per series, matched automatically against a shared metadata service and organized into a proper series-and-issue database rather than a raw folder tree. That difference felt worth finishing.

Have one big comic folder and just want to browse it like a file manager? Try YACReader first — it's free, mature, and built exactly for that kind of folder-tree browsing. Digital Longbox and Longbox Reader are still actively evolving, with bug fixes and improvements ahead, but they take a different approach to organizing a library and will take time to reach that same level of polish.

Along the way, a handful of very different tools shaped how these apps think about your files, without copying any of them directly:

WinAMP + CDDB

Just knew which songs matched your files. That kind of quiet, automatic recognition is what comic scanning aims for.

Media Companion

A Windows tool for generating metadata for local media files — the inspiration behind editable, enrichable comic metadata.

Plex

Serves your own local media across your network. Digital Longbox does the same thing, for comics instead of video.

A note on content: Digital Longbox and Longbox Reader are personal media management tools. Neither app includes, distributes, or provides access to any comic books or copyrighted content. You supply your own lawfully obtained files.