Use Cases
Why use an HTTP header masking tool?
Use this tool when request examples need to be shared without exposing raw authorization headers, cookies, API keys, IP addresses, or header-based identifiers first.
- Mask sensitive request headers before sharing examples externally
- Redact bearer tokens, cookies, API keys, emails, phone numbers, and IP values
- Keep masking local to the browser instead of sending raw headers to a backend
- Useful for support, debugging, API docs, and vendor communication
Masking Logic
How to mask sensitive values in HTTP headers
Mask Payload checks header names first, then applies pattern-based masking for sensitive values embedded in plain text. Header lines that look like authorization, cookie, token, or password carriers are redacted immediately.
- Header-aware masking for authorization headers, cookies, and API keys
- Pattern-based masking for email, phone, IP, and MAC-style values
- Readable output with copy/download options for clean handoff
Privacy Detail
Does this HTTP header masking tool upload data?
This tool runs as a static browser page. It processes header lines 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 headers are only written back to the output field unless you copy or download them yourself.
- The masking flow does not store the payload in browser local storage.
FAQ
Who should use a header sanitizer?
Does this tool upload headers 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 caseNumber, vendorRef, or internalNote and mask again.
Who is this tool for?
Mask Payload is for engineers, support teams, API reviewers, and anyone who needs to share raw header snippets more safely.
Why HTTP header masking matters before sharing request examples
Request headers often contain bearer tokens, cookies, forwarded IP values, API keys, and
internal identifiers. These values are easy to overlook when sharing troubleshooting
examples, but they can still expose live credentials or user data.
A browser-based header masker helps teams clean those lines up first while keeping the
request shape readable for support, debugging, docs, and AI-assisted workflows.