MIME Type Lookup
Look up MIME types by extension or media type.
Every file upload, HTTP response, and API payload uses a MIME type to describe its format - but remembering whether `.json` maps to `application/json` or whether `.svg` is `image/svg+xml` slows down development. Utilitoo's MIME Type Lookup provides a searchable reference of common MIME types, file extensions, and plain-language descriptions.
Web developers setting Content-Type headers, backend engineers validating upload filters, DevOps teams configuring CDN caching rules, and technical writers documenting file support all need a fast MIME reference without digging through IANA registries.
Search by extension like `.pdf`, by MIME type like `text/html`, or by keyword like image or video. Extension matches highlight at the top when you search a dotted suffix. Pair with HTTP Header Viewer when inspecting response headers or HTTP Status Codes when debugging API responses.
The reference loads entirely in your browser on Utilitoo. No uploads and no account required. Free for developers, sysadmins, and API designers who work with files and HTTP content types daily.
MIME Type Lookup is built for the inspect-edit-copy loop developers repeat dozens of times per day. Because Utilitoo runs in the browser, you avoid context switching to desktop utilities while reviewing logs, configs, or API responses. When output feeds into production systems, validate on a staging copy first.
Common use cases
- Look up MIME types by extension or media type - a common daily workflow on Utilitoo.
- Preparing mime type lookup results to paste into pull requests, tickets, or team chat.
- Validating mime type lookup data from a third-party API before wiring it into your application.
- Teaching or documenting mime type lookup workflows without installing desktop software.
- Cross-checking MIME Type Lookup output against a colleague's result during pair debugging or code review.
Tips & common mistakes
MIME Type Lookup runs entirely in your browser on Utilitoo, so you can paste sensitive API payloads, configs, or logs without uploading them. Start with a small sample to confirm the output format, then process the full input. If results look wrong, check for trailing commas, wrong encoding, or mixed line endings - common issues when copying from terminals or log viewers. Keep MIME Type Lookup in a pinned tab during active development - it is faster than CLI one-offs for quick transforms. Use the Related Tools section to chain utilities without returning to the homepage.
Common errors
- Unexpected output from MIME Type Lookup - double-check input format, character encoding, and whether the source data was truncated when pasted.
- Browser limits - very large inputs may slow or freeze the tab; split the data into smaller chunks if performance degrades.
| MIME type | Extensions | Description |
|---|---|---|
| application/json | .json | JSON data |
| application/xml | .xml | XML document |
| application/pdf | Portable Document Format | |
| application/zip | .zip | ZIP archive |
| application/gzip | .gz | GZIP compressed file |
| application/octet-stream | .bin | Generic binary data |
| application/javascript | .js, .mjs | JavaScript source |
| application/typescript | .ts | TypeScript source |
| application/x-yaml | .yaml, .yml | YAML document |
| application/x-toml | .toml | TOML configuration |
| application/x-www-form-urlencoded | - | HTML form submission |
| application/vnd.ms-excel | .xls | Legacy Excel spreadsheet |
| application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | .xlsx | Excel spreadsheet |
| application/vnd.openxmlformats-officedocument.wordprocessingml.document | .docx | Word document |
| text/plain | .txt, .log | Plain text |
| text/html | .html, .htm | HTML document |
| text/css | .css | CSS stylesheet |
| text/csv | .csv | Comma-separated values |
| text/markdown | .md, .markdown | Markdown document |
| text/javascript | .js | JavaScript text |
| image/png | .png | PNG image |
| image/jpeg | .jpg, .jpeg | JPEG image |
| image/gif | .gif | GIF image |
| image/webp | .webp | WebP image |
| image/svg+xml | .svg | SVG vector image |
| image/x-icon | .ico | Icon file |
| audio/mpeg | .mp3 | MP3 audio |
| audio/wav | .wav | WAV audio |
| video/mp4 | .mp4 | MP4 video |
| video/webm | .webm | WebM video |
| font/woff2 | .woff2 | WOFF2 web font |
| multipart/form-data | - | Form upload with files |
How to use
- Search by extension such as .json or by MIME type such as image/png.
- Review matching entries in the table.
- Use the result in headers or upload validation.
Frequently Asked Questions
What is a MIME type?▼
A MIME type (media type) identifies the format of a file or HTTP body, such as text/html or application/json.
How do I find the MIME type for a file extension?▼
Search the extension in Utilitoo, for example .png or .json, to see matching MIME types and descriptions.
Can I search by MIME type instead of extension?▼
Yes. Enter a full MIME type like image/webp or application/pdf to find matching entries.
Are all MIME types included?▼
Utilitoo covers the most common web, developer, and document MIME types used in HTTP and file uploads.
Is lookup data sent to a server?▼
No. The reference and search run entirely in your browser on Utilitoo.
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