Developer Tools

HTTP Header Inspector

Parse raw HTTP headers into a structured table with descriptions and categories.

All (13)Response (2)Caching (2)Security (5)CORS (1)Content (2)Other (1)
Content-TypeContent

application/json; charset=utf-8

MIME type of the response body

Content-LengthContent

1234

Size of the response body in bytes

Cache-ControlCaching

public, max-age=3600

Directives for caching mechanisms

ETagCaching

"abc123"

Identifier for a specific version of a resource

Strict-Transport-SecuritySecurity

max-age=31536000; includeSubDomains

Force HTTPS connections (HSTS)

X-Content-Type-OptionsSecurity

nosniff

Prevents MIME type sniffing (nosniff)

X-Frame-OptionsSecurity

DENY

Controls whether page can be in iframe

Content-Security-PolicySecurity

default-src 'self'

Controls resources the browser can load

Referrer-PolicySecurity

strict-origin-when-cross-origin

Controls how much referrer info is sent

Access-Control-Allow-OriginCORS

*

Origins allowed for CORS requests

ServerResponse

nginx/1.24.0

Software used by the origin server

DateOther

Thu, 19 Mar 2026 00:00:00 GMT

Date and time the message was sent

Set-CookieResponse

session=abc123; Path=/; HttpOnly; Secure

Set a cookie on the client

HTTP Header Inspector: Parse raw HTTP headers into a structured table with descriptions and categories. Runs entirely in your browser — paste your input, get instant output, nothing is uploaded.

Related Tools

.env Editor
Parse, edit, diff, and export .env files with duplicate detection
CSV Viewer & Editor
Parse, edit, sort, filter CSV data and export as JSON, TSV, or Markdown
Semver Calculator
Test semver ranges, compare versions, and explore version range syntax
Git Command Builder
Interactive git command constructor with 40+ operations and explanations

🔒 This tool runs entirely in your browser. No data is sent to any server.