tempboxs — temporary disposable emailtempboxs
Browser-only utility

MIME Type Lookup, private by default

Search common content types for headers, uploads, downloads, APIs, and static assets without fetching a URL or inspecting files.

Look up MIME types

Search common file extensions and content types for headers, uploads, downloads, API responses, and static assets without making a network request.

Matching types
1 result
.json

application/json

data

JSON APIs and config

Note: Avoid serving private JSON publicly without access controls.

MIME lookup runs locally in your browser. It does not inspect files, fetch URLs, or send searched values to tempboxs.

How to use mime types safely

Why MIME types matter

A MIME type, often sent in the Content-Type header, tells browsers and clients how to interpret a response. The same bytes can behave very differently when served as HTML, JSON, plain text, an image, or a download.

Correct content types help pages render, scripts execute, styles load, fonts work, APIs parse responses, and crawlers understand public files.

Common places to check

MIME types matter when configuring static hosting, upload validation, API responses, file downloads, CDN rules, and security headers. They also matter when debugging browser console errors that mention strict MIME checking.

Do not trust a file extension alone for security decisions. Uploaded files should be validated with server-side checks, size limits, scanning, and strict storage rules.

  • Content-Type headers for API responses
  • Static asset types for CSS, JavaScript, images, and fonts
  • Download behavior with Content-Disposition
  • Upload validation and file handling
  • Browser strict MIME type errors

Security reminders

Some file types deserve extra care. SVG files can contain script-like behavior if unsanitized, HTML can execute active content, and archives can hide many files inside one upload.

A lookup table helps you choose expected types, but it does not inspect real files. Confirm production behavior with response headers, browser devtools, and server-side validation.

Why people use this tool

MIME lookup runs locally in your browser. tempboxs does not inspect files, fetch URLs, or receive searched values.

Find common content types

Search frequent extensions such as HTML, CSS, JSON, PDF, SVG, WebP, ZIP, WOFF2, and more.

Review delivery notes

See practical reminders for headers, browser behavior, downloads, uploads, and security-sensitive file types.

Copy support snippets

Copy MIME type notes into bug reports, support replies, deployment docs, or API review notes.

Guides from the blog

Learn more about privacy, tracking, passwords, and safer signups.

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FAQ

No. This tool is a local reference lookup. It does not upload files, inspect file bytes, or fetch URLs.

Content-Type is the HTTP header that usually carries the MIME type, sometimes with parameters such as charset=utf-8.

No. Extensions and MIME types are useful clues, but uploaded files need server-side validation, scanning, and strict handling.

Browsers can reject resources when they are served with a type that does not match how the page is trying to use them.