We do not store your data. All processing happens in your browser.

Static + Browser-Only

Mask Properties Files Online

Paste a config snippet and mask common secret values in your browser before sharing it with AI tools, tickets, chats, or documentation.

All processing happens locally in your browser. No server processing required.

Input

Raw properties file

Tip: paste text or drag and drop a file here.

Paste or drag and drop a file, then run the tool.

Output

Masked properties

Masked payload will appear here

Use Cases

Why use a properties masking tool?

Use this tool when .env files, application.properties files, or config snippets need to be shared without exposing raw secrets, passwords, tokens, or private keys first.

  • Mask secret values in config files before sharing them externally
  • Redact API keys, tokens, passwords, and private config values
  • Keep masking local to the browser instead of sending config to a backend
  • Useful for debugging, onboarding docs, support, and internal reviews

Masking Logic

How to mask sensitive values in properties files

Mask Payload checks common key names such as API key, password, token, secret, client secret, and access token, then masks only the value side of each key-value pair.

  • Key-aware masking for KEY=value and key: value lines
  • Quoted values and common patterns can both be masked
  • Readable output with copy/download options for clean handoff

Privacy Detail

Does this properties masking tool upload data?

This tool runs as a static browser page. It processes config text in client-side JavaScript in the current tab. No form submission, fetch request, XMLHttpRequest, or masking API call is used during the masking flow.

  • No form submission is used for the masking flow.
  • No fetch, XMLHttpRequest, or API call runs during masking.
  • The page uses local JavaScript parsing and regular expressions in the current tab.
  • The config text is only written back to the output field unless you copy or download it yourself.
  • The masking flow does not store the payload in browser local storage.

FAQ

Who should use a properties sanitizer?

Does this tool upload properties files anywhere?

No. The masking runs entirely in the browser on the current page.

Can I add custom masking fields?

Yes. Add custom field names such as vendorKey, webhookToken, or privateSalt and mask again.

Who is this tool for?

Mask Payload is for engineers, DevOps teams, support teams, and anyone who needs to share configuration text more safely.

Why masking properties files is important before sharing

Teams frequently copy properties files into tickets, onboarding docs, deployment notes, or troubleshooting threads. Those files often contain passwords, API keys, client secrets, webhook tokens, and private environment values.

A secure config masker helps reduce accidental secret exposure while keeping the overall structure of the file readable for debugging and internal collaboration.

Related tools: HTTP Header Masker, Text Masker, cURL Masker

Examples

Example input and output

These short examples show the kind of input this page is built for and the kind of cleaned result you can expect before sharing data externally.

Example Input Sample data before masking or extraction 
clientSecret=demo-client-secret-value
apiKey=sk-prod-demo-token
Example Output Sanitized or extracted result 
clientSecret=****
apiKey=****

Tool Directory

Browse masking tools by category

Find related browser-only masking tools for structured payloads, requests, tokens, config files, logs, infrastructure secrets, web payloads, security review, and practical guides.