PDF Inspector

A DevTools-style element inspector and editor for PDFs on Android.

At a glance:

• DevTools for PDFs: every page's content stream is parsed into a navigable tree of text blocks, vector paths and images, grouped the way the PDF actually draws them. Switch between friendly labels and the raw content-stream operators.
• Two-way selection: tap an element on the page or tap its row in the tree, and the other side highlights to match, drawn as a clear bordered outline on the canvas.
• Edit in place: move and resize any element, recolor its fill or stroke as hex (the editor names the element's color space), and retype text. When the original font is missing a character, re-encode the line with a fallback font, bundled (Liberation) or taken from your device or imported. Changes are written straight back into the content stream, with full undo and redo.
• Surgical delete: remove exactly the element you picked by rewriting just its slice of the content stream, leaving the rest of the page untouched.
• Save a copy, never the original: your edited PDF is written to a new file through the system file picker, so the source document is left exactly as it was.
• Smooth viewing: pan and pinch-zoom, fit to width or height, a global zoom that carries across pages, and a full-screen mode.
• Dockable inspector: the inspector panel docks to the side in landscape or the bottom in portrait, resizes by dragging, and can be made transparent to see the page through it.
• Material You: Material 3 design with dynamic color on Android 12+, light / dark / system themes and a choice of accent colors.
• Private and open: open source, no accounts, no telemetry. No network access and no storage permission: files are opened and saved through Android's Storage Access Framework, so the app only ever touches the documents you explicitly pick.