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Detailed tool guide

Flattened PDF Redaction: instructions, examples and limits

Marks sensitive visible areas, paints them opaque black, then rebuilds every page as a new raster image in a fresh PDF so source text and hidden PDF objects are not copied.

Open Flattened PDF Redaction
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This tool is registered for local processing. Its tool input is handled in the current page; LittleKit’s product analytics do not include the input value.

What it does

Marks sensitive visible areas, paints them opaque black, then rebuilds every page as a new raster image in a fresh PDF so source text and hidden PDF objects are not copied.

Use flattened redaction when you need a shareable image-only copy after marking visible sensitive areas yourself.

How to use it

  1. 1

    Load the PDF and mark every visible area that must be hidden.

  2. 2

    Review the marked page at a readable zoom, including headers, footers and repeated pages.

  3. 3

    Export the flattened copy and test it by searching or copying text before sharing it.

Worked example

Mark a name and account number, then export a flattened copy and verify the black areas before sharing.

The example demonstrates the operation. For file-based tools, results depend on the selected file and options.

How the result is produced

Marks sensitive visible areas, paints them opaque black, then rebuilds every page as a new raster image in a fresh PDF so source text and hidden PDF objects are not copied.

Important limits

Local processing. This flattened workflow supports one PDF up to 25 MB and 15 pages, subject to a 20-million-pixel rendering budget and an 80 MB output cap. It does not upload files. Not native PDF redaction. Every page becomes an image-only page; text selection/search, form fields, links, comments, attachments, signatures, accessibility structure and source metadata are discarded. The preview and export enforce pixel and canvas-size limits. Review each marked area in the exported file; LittleKit cannot determine whether you marked all sensitive content.

Checks before sharing or relying on the result

  • This workflow rebuilds every page from pixels, so the original text and PDF objects are not copied into the output.
  • It cannot decide whether you found every sensitive item, and it removes search, forms, links, comments, attachments and signatures.
  • Keep the original in a secure location and treat the exported file as a new, image-only document.

Choosing the next step

Start with the least destructive operation that solves the job. Page organization preserves more of the source than raster compression; compression is useful for scans but can remove selectable text; flattened redaction removes the original object layer but requires you to mark every sensitive area yourself.

PDF Metadata RemoverRemoves the document Info dictionary and document-level XMP metadata stream.PDF Form FillerDetects named AcroForm text boxes, checkboxes, dropdowns, radio groups and option lists, then fills them in a new PDF copy.Compress PDFRebuilds every page from a compressed JPEG at a chosen resolution to reduce image-heavy and scanned PDFs.

Related practical guides

See a mismatch between these instructions and the tool? Report a correction with a non-sensitive example.