Redact your documents before AI sees them. 把敏感信息先脱敏再交给 AI。
DocMask is a local-first desktop tool that swaps personal data in Word, Excel, and legacy .doc / .xls files with reversible aliases — before you paste or upload to ChatGPT, Claude or Copilot. Keep an encrypted mapping locally and one-click restore the AI's answer back to the real values.
DocMask 是一款在本机运行的桌面工具:把 Word / Excel(包括旧版 .doc / .xls)里的个人信息替换成可逆别名,再交给 ChatGPT、Claude、Copilot 等 AI。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 delete data. DocMask lets you reverse it. Send the AI a scrubbed copy, get back a useful answer, then stitch the real names, phone numbers and IDs back in — all locally.
大多数"脱敏"工具只会抹掉数据。DocMask 还支持还原:把清洗过的文档发给 AI,拿到回答后再把人名、电话、身份证号拼回去——全程本地。
Local-first, never phones home
本地优先,不联网
No cloud, no telemetry, no accounts. Your licence is verified entirely on your device using public-key cryptography — no licence server, no callbacks, no fingerprint upload. The only outbound network call is an optional update check. Unplug your cable — DocMask still redacts.
没有云、没有遥测、没有账号。你的 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。唯一的对外网络请求是可关的更新检查。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, and legacy .doc / .xls
Word、Excel,包含旧版 .doc / .xls
Native .docx / .xlsx editing preserves fonts, tables, formulas, headers and footers. 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。旧版 .doc / .xls 自动走本机 Office / WPS / LibreOffice 转换。
Templates for recurring work
模板化的重复工作流
Save a rule set + keyword list once. Reuse across every HR, finance or audit document. Aliases stay consistent across runs.
把规则和关键词存成模板,HR、财务、审计的同类文档一键套用,别名在多次脱敏之间保持一致。
Batch mode for folders
文件夹级批量处理
Drop a folder, get a zipped bundle: every redacted file, a merged mapping, and a CSV report. 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。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
本地脱敏
Import a Word or Excel file. DocMask highlights every name, phone, ID, IBAN, credit card and custom keyword. Pick what to replace.
导入 Word / Excel,DocMask 自动标出每个人名、电话、身份证、IBAN、信用卡和你自定义的关键词。挑选要替换的。
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 with one click
一键还原
Paste the AI's answer into DocMask. Using your locally encrypted mapping, aliases turn back into real values. The mapping never leaves your machine.
把 AI 的回答粘回 DocMask,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 via Creem (VAT / GST included) rolls out with v0.8.1 — in the meantime, email bd@docmask.app for early-bird orders or invoices. Educational and non-profit discounts available on request. 价格以美元计。v0.8.1 版将接入 Creem 国际收银台(含 VAT / GST)。上线前可邮件 bd@docmask.app 提前下单或开票。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。文档内容、映射表、license token 和任何用户生成内容都不离开你的电脑。唯一的对外网络请求是可关的更新检查。License 校验 100% 离线 —— 你的 token 由我们用 ed25519 私钥离线签发,DocMask 用内嵌的公钥本地验签。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?
.doc/.xls) 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,对 Office 格式(Word/Excel/.doc/.xls)的支持更完整,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 / B, Phone A, ID A. Modern LLMs handle them transparently — in internal testing, answers are indistinguishable in quality from non-redacted prompts on the same task.
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。
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. 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。旧版 .doc / .xls 会先经 Microsoft Office / WPS / LibreOffice 转换,再按新格式处理。
macOS / Linux support? 支持 macOS / Linux 吗?
How much does it cost? 多少钱?
What if my purchase doesn't work? 买了用不了怎么办?
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