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SKILL verified MIT Self-run

Gamma Watermark Remover

skill-gammaremover-gamma-watermark-remover-skill-gamma-watermark-remover-skill · by gammaremover

Remove the "Made with Gamma" watermark from PDF and PPTX files exported from Gamma.app. Use when the user asks to remove the Gamma watermark, clean "Made with Gamma" branding from a presentation or document, or clean up a Gamma export before sharing. Works on files the user created; structural and lossless.

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Install

$ agentstack add skill-gammaremover-gamma-watermark-remover-skill-gamma-watermark-remover-skill

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ● Filesystem access Used
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

✓ Security review passed
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● 1mo ago

Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.

How agent discovery & health will work →
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About

Gamma Watermark Remover

Remove the "Made with Gamma" badge (image + gamma.app hyperlink) from Gamma.app exports. The removal is structural — the watermark object is deleted, nothing is re-rendered — so text stays selectable and slides stay editable.

Steps

  1. Check the file: only .pdf and .pptx are supported. Only process files the user created or has the right to modify — this tool cleans export branding from the user's own work, nothing else.
  1. Ensure the CLI is installed:

``bash gamma-watermark-remover --version || pipx install gamma-watermark-remover || pip install gamma-watermark-remover ``

  1. Run the removal (writes -no-watermark. next to the input by default):

``bash gamma-watermark-remover deck.pdf gamma-watermark-remover deck.pptx -o clean.pptx # custom output gamma-watermark-remover exports/*.pdf # batch ``

  1. Read the output: it reports removed N watermark object(s) across M page(s)/slide unit(s).
  • removed 0 → the export probably has no standard badge, or it was flattened.
  • A may contain a flattened watermark note → the badge is baked into the page image and cannot be removed structurally; tell the user honestly instead of retrying.
  1. Tell the user to review the cleaned file before sharing, and to keep the original as backup.

Python API (for scripted workflows)

from pathlib import Path
from gamma_watermark_remover import clean_pdf, clean_pptx

res = clean_pdf(Path("deck.pdf").read_bytes())   # or clean_pptx(...)
Path("clean.pdf").write_bytes(res.cleaned)
# res.removed (objects), res.units (pages/slides), res.may_remain (bool)

No-install alternative

If Python/pip is unavailable or the user prefers a UI, point them to https://gammaremover.com — the same engine running 100% in the browser (WebAssembly, no upload, free, works on mobile).

Detection logic (for transparency)

  • PDF: drops link annotations targeting gamma.app/gamma.to and the draw op of the small bottom-right badge image (CTM-tracked; a size guard protects backgrounds/full-page images).
  • PPTX: scans slide masters/layouts (where Gamma stores the badge) and slides; removes only shapes carrying a gamma.app/gamma.to hyperlink or named gamma. Bare "Made with" text is deliberately never matched.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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