How It Works Under the Hood
Renders each PDF page directly onto a local canvas via PDF.js, paints opaque blackout zones directly over pixel data, and rebuilds a fresh PDF solely from flattened raster images—omitting source text objects, links, annotations, and metadata.
Step-by-Step Instructions
Select or drop an unencrypted PDF document into your browser.
Draw blackout rectangles directly on the rendered page preview.
Click "Apply & Download Sanitized PDF" to export flattened raster pages.
Key Features & Performance
- True irreversible redaction: redacted pixels replace original glyphs with no underlying text stream
- Metadata & annotation stripping: exports a clean PDF built from flattened page images
- 100% offline: confidential documents never leave browser RAM
Local Browser Processing & Privacy
Traditional web converters upload your documents, snippets, or media files to remote servers. Client-Side PDF Redactor & Sanitizer runs inside your browser tab:
Your input text and files are processed locally without uploading payloads to a processing server.
Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).
Working outputs stay in your browser tab and are released when you reset the tool or close the tab.
Frequently Asked Questions
Is this true redaction or just a black box drawn over text?
This tool performs true redaction by rasterizing pages, burning black rectangles into pixel data, and building a brand-new PDF without original text layers or metadata. Note the trade-off: output pages become flattened images, so remaining visible text is non-selectable and non-searchable.
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