Flattened PDF Redaction

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.

Processed locally in your browser. Your file never leaves your device.

Flattened redaction permanently changes the whole document.

Every page is rebuilt as an image-only page; original text, forms, links, comments, attachments, signatures, accessibility structure and metadata are not carried over. The marked areas are painted opaque black into the new page images. Inspect the exported copy before sharing it.

Remove sensitive content from a PDF copy

Mark visible text or images to cover. Processing stays on this device; maximum 25 MB and 15 pages.

Choose PDF

Local flattened redaction only. It rasterizes each page at about 144 DPI, omits annotation and form appearances, paints marked regions black, and creates a new PDF containing only page images. This is not native PDF redaction; image-based content outside selected areas remains visible. Redaction can fail if a source page exceeds the stated memory budget.

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How Flattened PDF Redaction works

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.

Try an example

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

Good to know

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.

Your privacy

Processing happens on this device for this tool. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.

When this tool is useful

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

How to use it

Load the PDF and mark every visible area that must be hidden.
Review the marked page at a readable zoom, including headers, footers and repeated pages.
Export the flattened copy and test it by searching or copying text before sharing it.

Checks before you rely 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.

This page is maintained with the tool implementation and its deterministic tests. If the result looks wrong, report the issue with a non-sensitive example.

Read the Flattened PDF Redaction instructions

A useful next step

PDF Metadata Remover

PDF Form Filler

Compress PDF

Made for clarity. Built to be useful.Report an issue