decrypt4pdf

A utility for removing password protection from an encrypted PDF when the password is known. It writes an unlocked copy to a chosen file path.

In plain words
What is it for?
Use it to decrypt a PDF by supplying its password, input file, and output file.
Why use it?
It lets you work with the document without entering its password each time or relying on separate PDF software.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/coderwanfeng/python-office/decrypt4pdf
Any agent
npx skills add CoderWanFeng/python-office --skill decrypt4pdf
Clone the repo
git clone --depth 1 https://github.com/CoderWanFeng/python-office

Made for: Claude Code, Codex.

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 349 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00031 $0.00349
Opus 5 $0.00015 $0.00175
Sonnet 5 $0.00006 $0.00070
Haiku 4.5 $0.00003 $0.00035

Measured 2d ago against content hash f7aa78997065, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

decrypt4pdf scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (__init__.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/pdf/decrypt4pdf/SKILL.md · 58 lines

What it actually says

decrypt4pdf Skill

解密 PDF 文件

功能描述

对加密的 PDF 文件进行解密处理。

所属分类

office/skills/pdf/decrypt4pdf/

调用方式

from skills.pdf import decrypt4pdf

decrypt4pdf(
    password='123456',
    input_file='./encrypted.pdf',
    output_file='./decrypted.pdf'
)

参数说明

参数 类型 必填 默认值 说明
password str - 解密密码
input_file str - 输入 PDF 文件名(包含路径)
output_file str - 输出的解密 PDF 文件名(包含路径)
input_path str - 输入文件的完整路径
output_path str - 输出文件的完整路径

返回值

None

使用示例

from skills.pdf import decrypt4pdf
decrypt4pdf(password='mypassword', input_file='./encrypted.pdf', output_file='./decrypted.pdf')

视频教程

https://www.python4office.cn/python-office/popdf/%E8%AF%BE%E7%A8%8B/6-decrypt4pdf

原始函数

office.api.pdf.decrypt4pdf

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 58 lines · 31 tokens per session scan A f7aa78997065

Subscribe to this mod's changes

decrypt4pdf is a skill published in the GitHub repository CoderWanFeng/python-office (1,346 stars, last pushed 13d ago), licensed Apache-2.0. It adds 31 tokens to every session and 349 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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