Do these tools make external API requests?
Reference and parsing tools work locally and do not contact the APIs represented by the data you enter.
All collections
Developer tool collection
API Development Tools
Inspect API specifications, URLs, cookies, status codes and common HTTP metadata.
API
OpenAPI Viewer
Explore and inspect OpenAPI specifications.
Open toolEncoding
URL & Query String Parser
Parse URLs, inspect their components and edit query parameters.
Open toolDevelopment
HTTP Status Code Explorer
Search HTTP response codes and understand what each status means.
Open toolDevelopment
MIME Type Lookup
Search MIME types by file extension, media type or description.
Open toolDevelopment
Cookie Parser & Builder
Parse, edit and rebuild Cookie and Set-Cookie HTTP headers.
Open toolSecurity
JWT Decoder
Decode JWT headers, payloads and expiration data.
Open toolAbout this collection
The API tools collection helps developers inspect request and response data, understand HTTP behavior and work with common web API formats. It combines specification viewers with practical URL, cookie and HTTP references.
What you can do
- Explore OpenAPI specifications.
- Parse complete URLs and edit query parameters.
- Search HTTP response codes and meanings.
- Look up MIME types and file extensions.
- Parse Cookie and Set-Cookie header values.
- Inspect JWT headers, payloads and expiration data.
Frequently asked questions
Can I inspect both request and response cookies?
Yes. Cookie Parser & Builder supports request Cookie headers and individual response Set-Cookie values.
Does OpenAPI Viewer execute endpoints?
It is intended to inspect and visualize specifications rather than execute production API operations.