How to use: Detect File Type

Detect File Type is a free online File Tools tool that attempts to guess the MIME (Multipurpose Internet Mail Extensions) type of the data based on 'magic bytes'. Currently supports the following file types: instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.

Use Detect File Type now →

Description

Attempts to guess the MIME (Multipurpose Internet Mail Extensions) type of the data based on 'magic bytes'. Currently supports the following file types:

  • File Tools
  • Because everything is computed client-side, Detect File Type is safe to use with sensitive data such as API keys, tokens or private logs.
Input Detect File Type Output Runs 100% in your browser — your data never leaves your device.
Detect File Type — Input → Output

How to use

Using Detect File Type takes three steps:

  1. Paste your data into the input box (or load the example).
  2. Configure the options to match your target format or scenario.
  3. Copy, download or inspect the output — it updates live as you type.
How to use · Detect File Type 1 Paste your data intothe input box (or loadthe example). 2 Configure the optionsto match your targetformat or scenario. 3 Copy, download orinspect the output —it updates live as youtype.
How to use

Run

Use cases

Common situations where Detect File Type helps:

  • Attempts to guess the MIME (Multipurpose Internet Mail Extensions) type of the data based on 'magic bytes'. Currently supports the following file types:

Parameters

This tool has no options — it works on the input alone.

FAQ

What is Detect File Type?

Detect File Type attempts to guess the MIME (Multipurpose Internet Mail Extensions) type of the data based on 'magic bytes'. Currently supports the following file types:. It runs entirely in your browser, so your data stays private.

Is Detect File Type free to use?

Yes. Detect File Type is free, unlimited and works without registration or installation.

Does my data get uploaded?

No. All processing happens locally in your browser; nothing is sent to any server.

Good to know

  • Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.
  • The worked example below could not be pre-computed for this tool (threw: function is not iterable (cannot read property Symbol(Symbol.iterator))); the interactive tool above still works normally.

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