Tool #167 · HTTP / uploads / storage

MIME Type Lookup & Content-Type Header Builder

Find the right media type for common file extensions, build clean Content-Type headers with optional parameters, and copy deployment snippets for app servers, static hosts, object storage, and multipart uploads.

Best foruploads, downloads, CDNs, APIs
Buildsheaders, metadata, and snippets
Helps avoidwrong previews, broken charset, bad caching
Includesbrowser behavior + security notes

Header builder

Pick a known file type or enter a custom media type. Add parameters like charset=utf-8 or boundary=..., then copy the final header.

Final header


              

Raw MIME value


              

Browser / client behavior


              

Validation notes


              

Code snippets

Ready-to-copy snippets for common stacks. The examples update as you change the MIME type and filename.

Express / Node


              

Nginx


              

Python / Flask


              

S3 / object storage metadata


              

Common MIME reference

Quick lookup table for frequent file types. Search above filters this list too.

Extension MIME type Category Typical use Notes