PDF 암호 설정

PDF 파일에 비밀번호를 설정하여 문서를 보호합니다. 열기 제한 및 권한 설정을 제어하세요.

Upload PDF File

Drag and drop a PDF file here, or click to browse.

이 도구에 대하여

강력한 암호화 알고리즘으로 PDF를 보호합니다. 문서를 열 때 필요한 비밀번호와 인쇄/복사 제한을 위한 마스터 비밀번호를 설정할 수 있습니다.

사용 방법

PDF 업로드
보호할 파일을 선택합니다.
비밀번호 입력
열기 암호 또는 권한 암호를 입력합니다.
암호화 실행
보안이 적용된 PDF를 다운로드합니다.

활용 사례

민감한 자료 공유

급여 명세서나 계약서 등 개인정보가 포함된 파일을 안전하게 전달합니다.

콘텐츠 도용 방지

복사나 인쇄 기능을 비활성화하여 내용을 보호합니다.

Practical guide

Why choose local processing?

Sensitive PDFs can contain contracts, invoices, identity details, or internal business information, so keeping processing in the browser reduces exposure.
The website tool is free to use with no usage limits and does not require sign-in.
Local processing also keeps iteration fast: adjust options, preview the result, and export an encrypted PDF without waiting for an upload queue.

Best files for this tool

Best for PDF files that open correctly in a modern browser and are not intentionally damaged or restricted.
Works well for everyday business, school, legal, finance, and personal documents where you need an encrypted PDF.
For very large files, close unused tabs and process one batch at a time so the browser has enough memory.

Common limitations

Encrypted or permission-restricted PDFs may need to be unlocked before processing.
Scanned pages, unusual fonts, complex layers, and damaged files can reduce accuracy or processing speed.
Browser memory and device performance matter more for local tools than for upload-based services.

Local processing vs upload-based tools

Local tools keep routine website processing on your device, while upload-based tools send files to a remote server.
Upload-based services can move heavy work off your computer, but they add transfer time and require trusting a server with your files.
Use the API when you intentionally need server-side automation; use the website when you want private manual processing.

What to do if processing fails

Try a smaller file, a shorter page range, or one file at a time if the browser runs out of memory.
If a PDF is encrypted, damaged, or restricted, unlock or repair it first and then retry the workflow.
If the output looks wrong, check whether the source file uses scans, complex transparency, form fields, or unsupported embedded objects.

API automation

Use API docs to plan automated PDF workflows. If this exact website workflow is not exposed as an endpoint yet, you can still use available PDF API tools and Credits for supported operations.

View API automation docs Create API Key

자주 묻는 질문

얼마나 안전한가요?

AES 256비트 암호화 방식을 사용하여 매우 높은 수준의 보안을 제공합니다.

비밀번호를 잊어버리면 어떻게 하나요?

보안을 위해 암호화된 비밀번호는 본인 외에는 알 수 없으니 반드시 기억해 두시기 바랍니다.

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