File MIME Type Detector

Drop files onto a zone and see a preview with name, size, and type. Copy the JavaScript pattern for your site.

Developer Tools demo drag drop file upload

Encode any file into a Base64 string that you can copy, or decode a Base64 string back to a downloadable file. Pure frontend.

Encoder/Decoder Base64 decode encode file

Drop any file to see its raw hexadecimal representation and ASCII side‑by‑side. Navigate with offset. Client‑side only.

Developer Tools binary file hex viewer

Upload a small file to see each byte as a block, color-coded by value. Visualize the structure of binary data. Client-side.

Developer Tools binary bits file visualizer

Paste a data: URL and instantly download the file it represents. Supports all MIME types. Simple extraction.

Converter data URL decode download file

Upload multiple text files and concatenate them into one, with optional separators. No upload; processed instantly.

Text Tool combine file merge text

Drop a file to see its MIME type and the first few magic bytes (hex and ASCII). No upload, works instantly.

Developer Tools detector file magic bytes MIME

Tag: File MIME Type Detector