File Utilities

Not every file task involves editing the file itself — sometimes you just need a quick answer about a file's properties. What does this extension actually mean? What MIME type should a server send for this file? How many megabytes is this in gigabytes? File Utilities collects the small, fast-answer tools built for exactly those moments.

The File Size Converter handles conversions between bytes, kilobytes, megabytes, gigabytes, and terabytes, which comes up often when comparing storage limits, upload caps, or plan quotas that are quoted in different units — cloud storage providers, email attachment limits, and hosting plans don't always use the same unit, and converting between them by hand is an easy place to make an error.

The MIME Type Lookup and File Extension Lookup tools serve a similar quick-reference purpose for developers and anyone configuring file uploads. MIME Type Lookup tells you the correct content type header for a given extension — essential when configuring a server to serve files correctly or debugging why a browser is handling a download the wrong way. File Extension Lookup goes the other direction, explaining what a given file type actually is, what kind of data it typically holds, and which applications are commonly used to open it, which is useful when you come across an unfamiliar extension and want a fast, reliable answer.

These utilities are intentionally simple — no file upload is required for any of them, since they work from extension names and unit conversions rather than the file contents themselves. They're built to answer a specific question in a few seconds and get out of your way, without requiring you to dig through documentation or search engine results for a one-line answer.