Prepare application test data
Create 5 values for a local integration test.
Copy the generated or inspected values into the test fixture.
Find a common MIME type from a file extension or media type.
Find a common MIME type from a file extension or media type. Use it for common development values, schedules, and reference lookups. Lookups run in this browser.
Look up common media types and extensions. The last query is saved locally.
The reference is curated and does not include every registered value. Copy or download matching entries.
Create 5 values for a local integration test.
Copy the generated or inspected values into the test fixture.
Lookups run in this browser. The last query is saved locally.
Common MIME types, Common HTTP status codes. The reference is curated and does not include every registered value.
Copy or download matching entries.
Confirm protocol requirements in the relevant standards before production use.
Preview HTML inside a restricted browser sandbox.
HTML tools
Find HTTP status meanings and categories.
Developer tools
Break a URL into protocol, host, path, query, and hash.
URL tools
Start with a realistic example
Load a safe sample, or paste and upload your own value from the toolbar.
Add input, upload a file, or try the example to begin.