Unmark Files auto-delete after 30 min

Universal watermark remover

Every watermark.
Every format. Gone.

Drop a PDF, Word, PowerPoint, Excel, SVG or image. Unmark opens it up, inspects every layer, shape, header and pixel, and removes only what is a watermark.

  • Every layer, shape and page inspected
  • Only the watermark removed, layout untouched
  • Files deleted automatically after 30 minutes
Sensitivity
Removes items with strong, stacked evidence.
Knowing the words makes text watermarks a certain match.

Connecting to server…

How it works

Look everywhere. Remove precisely.

Watermarks are built differently in every format, so Unmark doesn’t guess which method was used. It runs all of them on every file.

01

Identify

The real file type is read from its bytes, not its extension. Legacy formats like .doc and .ppt are converted so their internals can be opened.

02

Inspect everything

Every annotation, layer, content stream, shape, header, master slide and pixel cluster is walked and scored for watermark evidence.

03

Remove surgically

Only the watermark goes. Everything else, including fonts, layout, colours, clipping and metadata, is kept byte-for-byte where possible.

Evidence, not guesswork

Each candidate collects points: a watermark phrase, a diagonal angle, transparency, repetition across pages, placement behind text. Definitive markers, such as Acrobat’s watermark artifact or Word’s watermark gallery, score instantly. Weak hints have to stack before anything is touched.

You choose the bar. Safe needs 8 points, Balanced 5, Aggressive 4.

Text object · Page 1“CONFIDENTIAL”
  • Watermark phrase+4
  • Rotated 45°+3
  • 35% opacity+3
  • Repeats on 3 / 3 pages+2
  • 64 pt type+1
Score13
Removed · threshold 5

Formats

One tool, every way a watermark hides.

PDF

PDF documents

  • Watermark & stamp annotations
  • Optional-content “Watermark” layers
  • Acrobat watermark artifacts
  • Form XObjects, recursively
  • Rotated, translucent or repeated text
  • Overlay images and outlined vectors
  • Watermarks baked into scanned pages
DOCX

Word

  • Watermark gallery blocks
  • PowerPlusWaterMark text shapes
  • Washed-out picture watermarks
  • Header & footer drawings
  • Page background fills
PPTX

PowerPoint

  • Slides, layouts and masters
  • Rotated or transparent shapes
  • Shapes repeated on every slide
  • Watermark-named objects
  • Placeholders protected
XLSX

Excel

  • Header/footer pictures (&G)
  • Header/footer watermark text
  • Worksheet background images
  • Drawing-layer shapes
IMG

Images

  • Document-tone separation for scans
  • Semi-transparent overlay detection
  • Reverse alpha blending keeps detail
  • Inpainting for opaque marks
+

SVG & legacy

  • SVG text, groups and images
  • .doc .ppt .xls via conversion
  • .odt .odp .ods and .rtf
  • Macro-enabled Office files

About

Built for the documents you own.

Old drafts still stamped “DRAFT”. Templates that came with someone else’s logo. A scan that picked up a “COPY” overlay. Unmark exists to give you back a clean version of your own files without rebuilding them by hand.

Private by design

Files are processed on this server and never sent to a third party. Cleaned outputs are deleted automatically after 30 minutes.

Honest about pixels

Structural watermarks in PDF and Office files come out cleanly. Marks baked into pixels are reconstructed. That works well on documents and translucent overlays, less well on busy photos.

Use it responsibly

Only clean files you created or have the right to modify. Don’t use Unmark to strip attribution or ownership marks from other people’s work.