Redact your documents before AI sees them. 把敏感信息先脱敏再交给 AI。
DocMask runs the redaction workflow on your computer, before any AI vendor sees the file. It swaps supported sensitive values in Word, Excel and PDF (plus legacy .doc / .xls) with reversible aliases before you paste them into ChatGPT, Claude or Copilot. Review every change in a side-by-side preview, keep the mapping encrypted on disk, then one-click restore the AI's answer back to the real values.
DocMask 在你的电脑上先完成脱敏，再让任何 AI 厂商看到文件。Word、Excel、PDF（含旧版 .doc / .xls）里命中的敏感值会替换成可逆别名后再粘给 ChatGPT、Claude、Copilot。每条改动在左右对照视图里逐条确认，映射表在本机加密保存，AI 回答里的别名一键还原为真实值。
Built for the AI era, not the 2015 compliance era.
为 AI 时代而生，不是 2015 年的合规产物。
Most redaction tools are built for publishing or archiving. DocMask is built for AI collaboration: send the AI a scrubbed copy, get back a useful answer, then stitch the real values back in locally.
大多数脱敏工具是为了发布或归档。DocMask 是为了 AI 协作：把清洗过的文档发给 AI，拿到回答后再把真实值本地拼回去。
Your files do not leave this computer
你的文件不出这台电脑
No document cloud, no in-app telemetry, no accounts. Licence verification happens on your device with public-key cryptography — no licence server, no callbacks, no fingerprint upload. The only desktop network path is an optional update check. Unplug your cable — DocMask still redacts.
没有文档云、没有 App 内遥测、没有账号。License 完全在本机用公钥密码学验签——无 license 服务器、无回调、无指纹上传。桌面端唯一网络路径是可关闭的更新检查。拔掉网线，脱敏照常运行。
Reversible by design
天生可逆
Aliases (Person_A, Phone_B) preserve readability so the AI's answer still makes sense. Paste the answer back, DocMask restores the real values in one click.
别名（人物 A、电话 B）让 AI 的回答仍然可读。把回答粘回 DocMask，一键还原成真实值。
Word, Excel, PDF — plus legacy .doc / .xls
Word、Excel、PDF，含旧版 .doc / .xls
Native .docx / .xlsx editing preserves fonts, tables, formulas, headers and footers. Text-layer .pdf round-trips through your local LibreOffice. Legacy .doc / .xls auto-convert via MS Office, WPS or LibreOffice on your machine.
原生处理 .docx / .xlsx，字体、表格、公式、页眉页脚一个不动。文本层 .pdf 通过本机 LibreOffice 透明往返。旧版 .doc / .xls 自动走本机 Office / WPS / LibreOffice 转换。
Side-by-side preview before you commit
落盘前左右对照预览
See the original and the redacted document rendered side by side in real Word layout — red strike-through on what's leaving, green highlight on the alias that replaces it. Synchronized scroll, fullscreen, zoom. Nothing is written to disk until you click Commit.
在真实 Word 排版里左右并排渲染原文档和脱敏后的同一份文档——将被替换的原值走红色删除线、取而代之的别名绿色高亮。滚动同步、可全屏、可缩放字号。点击确认并写入之前任何字节都不落盘。
Batch mode + reusable templates
批量处理与复用模板
Drop a folder, get a zipped bundle: every redacted file, a merged mapping, a CSV report. Save a rule set + keyword list once as a template, then reuse across every HR, finance or audit document — the same name gets the same alias across every file in the batch.
选一个文件夹，输出一个压缩包：所有脱敏文件 + 合并映射表 + CSV 报告。把规则和关键词存成模板，HR、财务、审计同类文档一键套用，跨文件的同一个原值始终对应同一个别名。
12+ PII rules out of the box
开箱 12+ 条 PII 规则
Built-in: CN ID / mobile / bank card / landline, US SSN / EIN / phone, EU IBAN, Luhn-checked Visa/MC/Amex, email, IPv4. Bring your own regex and keywords too.
内置：中国身份证 / 手机 / 银行卡 / 固话，美国 SSN / EIN / 电话，欧盟 IBAN，带 Luhn 校验的 Visa/MC/Amex，邮箱、IPv4。也可自定义规则和关键词。
Three steps between you and a safe AI prompt.
三步搞定"安全地喂 AI"。
Redact locally, preview first
本地脱敏，先预览
Import a Word, Excel or PDF file. DocMask highlights supported patterns such as emails, phones, IDs, bank cards, IBANs, IP addresses, CN locations and your custom keywords. Review every change in a side-by-side preview — nothing is written until you commit.
导入 Word / Excel / PDF，DocMask 自动标出支持的模式，例如邮箱、电话、证件号、银行卡、IBAN、IP 地址、中国行政区划和你自定义的关键词。左右对照里逐条确认——点击"确认并写入"之前什么都不落盘。
Prompt freely
放心送进 AI
Send the redacted file (or copy its text) to ChatGPT, Claude, Copilot — any LLM. Aliases are readable so the AI's reasoning stays intact.
把脱敏后的文档或文本发给 ChatGPT / Claude / Copilot 任意一家。别名保持可读，AI 推理不受影响。
Restore text or documents with one click
一键还原：文本或文档
Paste the AI's answer back — or drop the .docx / .xlsx / .pdf the AI handed you. Using your locally encrypted mapping, every alias turns back into the real value. The mapping never leaves your machine.
把 AI 的回答粘回 DocMask，或者直接选 AI 返回的 .docx / .xlsx / .pdf。借助本机加密的映射表，别名自动变回真实值。映射表永远不离开你的电脑。
Measurable privacy, not marketing privacy.
可量化的隐私，不是营销话术。
Try free for 14 days, then own it forever.
14 天免费试用，再决定一次性买断。
One desktop tool, three ways to get started. No subscriptions, no usage caps after purchase.
一个工具，三种上手姿势。买断之后无订阅、无文档数量上限。
- Full redaction + restore for 14 days14 天内脱敏 + 还原全功能
- No document or batch limits不限文档数量与批量
- Word, Excel, .doc, .xls支持 Word / Excel / 旧版 .doc / .xls
- After day 14: scan stays free, redaction needs a licence14 天后：扫描仍可用，脱敏需购买激活
- Everything in Trial, no expiry试用版所有功能，永不过期
- Unlimited documents and batch jobs不限文档数量与批量处理
- 1 year of free updates from purchase date购买后 1 年内免费升级
- Priority email support · 7-day full refund优先邮件支持 · 7 天全额退款
- Everything in Personal包含个人版所有能力
- Multi-device, multi-seat licence多设备、多席位授权
- Priority email support · shared Slack workspace on request专属微信群 / 邮件支持
- Contract, PO and VAT invoices (US, EU and CN) on request合同与增值税普票/专票
All prices in USD. International checkout runs on Creem (merchant of record; VAT / GST for EU / UK buyers is calculated and included at checkout, and PCI scope never touches us). License keys are signed with Ed25519 and delivered to your inbox in under a minute — the thank-you page also offers a one-click docmask:// activation deep link. Need a PO, contract or VAT-specific invoice? Email bd@docmask.app. Educational and non-profit discounts available on request.
价格以美元计。国际收款走 Creem（merchant of record，欧盟 / 英国买家的 VAT / GST 在结账时自动计算并含入；PCI 合规风险完全不落到我们这边）。License key 用 Ed25519 签名，一分钟内送达邮箱；感谢页还会提供一键 docmask:// 激活 deep link。需要合同、订单号或增值税专票请邮件 bd@docmask.app。教育用户与非营利机构可申请优惠。
Questions you'd ask a paranoid friend.
你最想问一个偏执的朋友的问题。
Is my data sent anywhere? 我的数据会被发到外部吗？
netstat / a packet sniffer, or just disconnect your network and confirm redaction still works.
不会上传文档内容或映射表到 DocMask。桌面 App 用内嵌 ed25519 公钥在本机验证 license token；购买后不依赖 license 服务器。桌面端唯一网络路径是可关闭的更新检查。你可以用 netstat 或抓包工具验证，或者直接断网，脱敏功能照样能跑。
How is this different from Microsoft Presidio? 和 Microsoft Presidio 有什么区别？
.docx / .xlsx / .pdf editing (plus legacy .doc / .xls), a side-by-side preview before commit, and an encrypted local mapping vault — so you can restore the AI's answer, not just delete sensitive data.
Presidio 是给开发者用的 Python 库。DocMask 是一个直接面向普通用户的桌面应用，基于 Tauri + Python sidecar，原生处理 .docx / .xlsx / .pdf（含旧版 .doc / .xls），落盘前先左右对照预览，并且有本地加密的映射表可以还原，而不只是删除。
Will the AI still give me a useful answer? 脱敏后 AI 的回答还可用吗？
Person_A / Person_B, Phone_A, ID_A. Always review important AI output before sending it onward.
可以。别名刻意选择了"保持可读"的形式：人物 A / B、电话 A、证件 A。现代 LLM 处理这种别名很自然，在我们的测试中，回答质量与未脱敏几乎没差别。
Can DocMask redact PDFs? What about scanned PDFs? PDF 能脱敏吗？扫描件 PDF 呢？
.pdf; the intermediate DOCX never leaves a temp folder. Scanned or image-only PDFs (camera photos of paper) are detected up front and rejected with a clear "install OCR first" message, rather than silently producing a blank output. LibreOffice needs to be installed for PDF support; Settings → "Document format compatibility" shows what's detected on your machine.
支持文本层 PDF。DocMask 调用本机 LibreOffice 把 PDF 透明往返成结构化 DOCX——扫描、脱敏、还原——再转回 .pdf；中间 DOCX 全程在临时目录、用户看不到。扫描件 / 纯图 PDF（拍照件、印刷件照片）会被前置识别并明确提示"请先安装 OCR"，而不是默默吐出一份空白结果。PDF 功能需要本机装 LibreOffice；设置 →「文档格式兼容性」可以看到本机检测到的引擎。
Does redaction preserve formatting? 脱敏会破坏文档格式吗？
.docx / .xlsx at the XML level — fonts, tables, headers, footers, formulas all stay intact. .pdf round-trips through LibreOffice while preserving the text layer. Legacy .doc / .xls are first auto-converted via Microsoft Office, WPS, or LibreOffice, then edited as .docx / .xlsx.
不会。DocMask 直接在 .docx / .xlsx 的 XML 层改写，字体、表格、页眉页脚、公式都原样保留。.pdf 通过 LibreOffice 透明往返并保留文本层。旧版 .doc / .xls 会先经 Microsoft Office / WPS / LibreOffice 转换，再按新格式处理。
What happens right after I pay? 付款之后我要做什么？
docmask:// deep link and activates in one step — no paste, no copy. The license is verified locally with an embedded public key, so your token is never sent back to us.
结账走 Creem（含欧盟 / 英国的 VAT / GST，由它代为合规）。付款成功后我们的 Cloudflare Worker 用 Ed25519 签一张 license key，邮件发给你，同时也在感谢页上显示。点击"Open DocMask & activate"，桌面应用会通过 docmask:// deep link 打开并一步完成激活——不用手动复制粘贴。License 完全用内嵌公钥本地验签，你的 token 从不回传到我们这边。
Which platforms are supported? 支持哪些操作系统？
How much does it cost? 多少钱？
What if my purchase doesn't work? 买了用不了怎么办？
Find the exact privacy workflow you need.
New practical guides for high-intent AI, PII and offline redaction searches. Each page points back to the same proof-backed product path: redact locally, ask AI with aliases, restore locally.
Can you upload confidential documents to ChatGPT?
A safer workflow for contracts, HR files, client records and financial tables.
Copilot securityMicrosoft 365 Copilot oversharing
Use local redaction as a document-level layer beside permissions and labels.
PII redactionPII redaction software for Word, Excel and PDF
Remove emails, phones, IDs, cards, IBANs and custom keywords locally.
Offline PDFOffline PDF redaction before AI or sharing
When "deleted after upload" is not enough, keep redaction on your machine.
Start redacting locally in under 2 minutes.
两分钟内，在本机开始脱敏。
Windows MSI + NSIS installer · ~30 MB · 14-day free trial · 7-day refund
Windows MSI / NSIS 安装包 · 约 30 MB · 14 天免费试用 · 7 天无理由退款