File Extension to MIME Type Checker
Look up standard Internet media MIME types for any file extension (e.g. .pdf, .webp, .json, .mp4).
Free • No Sign-up
Share Your Feedback on (File Extension to MIME Type Checker)
Encountered an issue, want an enhancement, or loved the tool? Let us know!
Quick suggestions (click to fill):
100% Client-Side
Processed in browser memory. Files are never sent to remote servers.
Zero Server Storage
No cloud disks or database logs. Data is discarded upon session end.
Free • No Sign-up
No accounts, credit cards, or watermarks. Instant unrestricted use.
Ultra-Fast Execution
Powered by WebAssembly for instant processing without upload queues.
How to Use - File Extension to MIME Type Checker
1
Type file extension (e.g. mp4, pdf, csv).
2
View official MIME header string.
Frequently Asked Questions
File Extension to MIME Type Checker