Magic Bytes Identifier
Magic Bytes Identifier is a free online File Tools tool that identify a file type from its signature bytes rather than its extension — the safe way to validate uploads 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.
How to use: Magic Bytes Identifier →
Description
Identify a file type from its signature bytes rather than its extension — the safe way to validate uploads.
- Because everything is computed client-side, Magic Bytes Identifier is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Magic Bytes Identifier takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Examples
These ready-made examples show typical inputs and the exact output Magic Bytes Identifier produces for them.
89504E470D0A1A0A0000000D49484452
The PNG signature followed by the start of its IHDR chunk.
Use cases
Common situations where Magic Bytes Identifier helps:
- Identify a file type from its signature bytes rather than its extension — the safe way to validate uploads.
- Because everything is computed client-side, Magic Bytes Identifier is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is Magic Bytes Identifier?
Magic Bytes Identifier identify a file type from its signature bytes rather than its extension — the safe way to validate uploads. It runs entirely in your browser, so your data stays private.
Is Magic Bytes Identifier free to use?
Yes. Magic Bytes Identifier 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.