Redact by nodedCode Studio - Air-Gapped PDF Redactor & Metadata Cleaner

Redact by nodedCode Studio is a production-grade, 100% client-side web application designed to permanently redact sensitive PDF content and strip all document author metadata directly inside browser volatile RAM. No server uploads occur at any point.

Live Application: https://redact.nodedcode.studio

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Technical Architecture & Security Flow

flowchart TD
    A[User Selects / Drops PDF File] --> B[PDF Read into Volatile RAM ArrayBuffer]
    B --> C[PDF.js Renders Viewport at High-DPI Resolution]
    C --> D[User Draws Black Redaction Rectangles]
    D --> E[PDF Point Coordinates Stored in Memory State]
    E --> F[Sanitize & Download Clicked]
    F --> G[Render Pages to Offscreen Canvas at 2.0x DPI]
    G --> H[Burn Solid Black Pixels Over Target Coordinates]
    H --> I[Convert Canvas Pages to PNG Images]
    I --> J[Embed PNG Images into Fresh PDF Document]
    J --> K[Wipe Title, Author, Subject, Producer & Timestamp Metadata]
    K --> L[Generate Clean PDF Download Blob]

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Core Capabilities

• Zero-Egress Air-Gapped Engine: Processing runs entirely in local browser memory. No backend APIs, telemetry scripts, or cloud servers are contacted.
• Irreversible Text Rasterization: Redacted pages are rendered to high-resolution PNG images before export. Text streams beneath black rectangles are physically destroyed, preventing text selection, copying, or extraction.
• Complete Metadata Sanitization: Wipes all hidden author tags, creation/modification timestamps, subject fields, producer signatures, and edit histories.
• Responsive Workspace: Includes dynamic page fitting, Retina devicePixelRatio scaling, zoom controls, and a dedicated Scroll Mode for mobile touch devices.
• SEO & Search Standard: Built in compliance with WebApplication JSON-LD schemas and 2026-2027 AI search crawler standards.

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Tech Stack

• Core: Vanilla HTML5, CSS3 (Bento-Brutalism Design System), JavaScript (ES2022)
• Page Rendering: PDF.js UMD 3.11.174
• PDF Manipulation: pdf-lib UMD 1.17.1
• Typography: Space Grotesk (Headings) & Inter (Body UI)

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Local Development & Deployment

Because Redact by nodedCode Studio is entirely self-contained within index.html, zero build tools or node packages are required.

# Clone repository
git clone https://github.com/nodedcode/redact.git
cd redact

# Serve locally using any static web server
npx serve .

To deploy to GitHub Pages, simply push index.html, robots.txt, and sitemap.xml to your repository's default branch.

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Ecosystem & Agency Attribution

Engineered by nodedCode Studio - A Digital Tech Agency and Software Ecosystem building privacy-first web applications and enterprise digital products.

• Website: https://nodedcode.studio
• Products: https://nodedcode.studio/#products