MIME Type Lookup for fast browser-based work
Find common Content-Type values by file extension, or extensions by MIME type.
中文：按文件扩展名查询常见 Content-Type，也可按 MIME 类型反查扩展名。
Example: Check headers for JSON, SVG, WebP, WASM, CSV, PDF, CSS, JavaScript, and media files.
Where this tool fits in real work
Use cases
- Check headers for JSON, SVG, WebP, WASM, CSV, PDF, CSS, JavaScript, and media files.
- Debug small development values without opening a heavy IDE or sending snippets to a remote service.
- Copy results into issue comments, pull requests, runbooks, or API notes.
Review notes
- Avoid production secrets unless your team explicitly allows local browser utilities for that data.
Local-first handling
This page is built as a browser utility. Inputs are processed in the page where possible, with no account requirement and no intentional upload step for the tool workflow.
When to use MIME Type Lookup
Good fit
- Check headers for JSON, SVG, WebP, WASM, CSV, PDF, CSS, JavaScript, and media files.
- Debug small development values without opening a heavy IDE or sending snippets to a remote service.
- Copy results into issue comments, pull requests, runbooks, or API notes.
Before copying results
- Avoid production secrets unless your team explicitly allows local browser utilities for that data.
Use a stricter workflow
If the content includes production secrets, live tokens, or customer system credentials, do not treat it as a casual debugging snippet.
Keep learning this workflow
Keep working with nearby utilities
MIME Type Lookup questions
Can it reverse lookup MIME types?
Yes. Enter a MIME type such as application/json.
Does it include every MIME type?
No. It includes a practical common set.
Is this tool free?
Yes. The current Toolkits tools are free to use and do not require an account. If advertising is added later, it should be clearly labeled and kept away from primary tool controls.