Library

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Inkwell

Comic Reader

Drop a comic book file here

or use the button below

All reading is done locally in your browser.
No uploads. No accounts. No tracking.

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Inkwell Guide

Opening Files

Drop a file onto the drop zone, or click Browse File. On Android, share a file from your file manager directly to Inkwell. On iOS, use Open In → Inkwell from the Files app. Previously opened files appear in the Library.

Supported formats: .cbz, .cbr, .cb7, .cbt, .pdf, .epub.

Navigation

Previous / next page. Also: swipe left or right, tap the left or right edge of the screen, scroll wheel, or ← → Space PgDn.

Tap the center of the screen to show or hide the controls. Click the page number in the bottom bar to jump to a specific page.

Reading Modes

Spread — two-page side-by-side view. RTL-aware page ordering. Nudge left/right buttons appear to shift which pages are paired together.

RTL — right-to-left reading for manga. Reverses page and panel order. Auto-enabled when the embedded panels.json sets "reading_direction": "rtl".

Rotate — rotates the view 90° clockwise. Resets when changing pages. The dropdown next to the rotate button has a Save rotation option that bakes the current rotation into the page image (and any associated panel coordinates) so it persists across sessions and gets included in downloaded CBZs.

Fullscreen — hides the browser chrome. Press F or click the button.

Panel View

Press P or click the panel button to step through individual panels in reading order with smooth zoom transitions.

Gold — panel data is embedded in the file as panels.json. Panels load instantly.

Teal — panels auto-detected by the on-device YOLO model (WebGPU-accelerated, WASM fallback). Detection runs in the background; results are saved to IndexedDB so each page is only processed once.

Clears auto-detected panels for the current file so they can be re-detected.

To detect panels for every page in one batch, open the Library on the landing screen, long-press (or right-click) a book, and choose Detect panels. Detection runs in the background and can be cancelled at any time.

Stitching Two-Page Spreads

When a two-page spread has been split across two image files in the CBZ, you can join them back into a single image. Enable Spread mode, open the dropdown next to the spread button, and pick Stitch pages. Adjust the overlap with the −5 / −1 / +1 / +5 buttons until the seam aligns, then press Stitch. The two source images are replaced in-place by a single combined image; downstream panel data is re-indexed automatically, and panel detection re-runs on the new stitched page.

Panel Editing

Edit panels — opens the panel editor. Draw new boxes by dragging on the page. Drag a box to move it; drag corners to resize. Number badges show reading order; use the +/− controls to re-order. Delete a box with the × button. Approve a page to mark its panels as user-verified — approved pages are flagged with "approved": true in the saved CBZ.

The toolbar also has an exposure slider to adjust page brightness and a gamma correction control to help distinguish panel borders when editing. Full undo/redo is available within the editor session.

Zoom

Zoom out, fit to screen, zoom in. Also: pinch-to-zoom or Ctrl+scroll.

Save CBZ

Save CBZ — re-packages the CBZ with a panels.json containing every page that has panel data, then triggers a download. User-verified pages carry "approved": true; unapproved auto-detected pages are included without that flag, so downstream tools can key off it to filter.

Save Image and Share Image are available via the overflow menu (⋮) or by right-clicking / long-pressing the page. Save Image downloads the current page as a PNG; Share Image opens the OS share sheet on mobile.

Optimize

Downscales page images to a chosen maximum height to reduce file size and improve performance on lower-end devices. Runs in the background and can be resumed if interrupted.

Keyboard Shortcuts

→SpacePgDnNext page / panel

←PgUpPrevious page / panel

PToggle panel view

FToggle fullscreen

SStitch current spread (no overlap)

CtrlZUndo the last quick-stitch

EscClose reader / exit fullscreen / close guide

Offline Use

Inkwell is a PWA. After the first visit online, the app caches itself and all dependencies — including the ONNX panel detection model — and works fully offline. No internet connection is required after the initial load.

Open Source

Inkwell Reader is free software licensed under the GNU Affero General Public License v3 (AGPL-3). A copy of the license is included with the source code.

Inkwell uses the following open-source libraries, vendored locally for offline use:

Ultralytics YOLO — AGPL-3 License (panel detection model training framework)

fflate by Arjun Barrett — MIT License

ONNX Runtime Web v1.20.1 by Microsoft Corporation — MIT License

PDF.js v5.7.284 by Mozilla Foundation — Apache 2.0 License

7z-wasm by Nickolas Willis — LGPL-2.1 (based on 7-Zip by Igor Pavlov)

EPUB.js by FuturePress — MIT License

JSZip v3.10.1 by Stuart Knightley — MIT License