Analyze Base64 File Type, MIME and Size
Analyze Base64 data to detect its file type, MIME type, decoded size, signature and validity locally before previewing or converting it.
File typeMIME typeDecoded sizeSignature / validity
Base64 analyzer
Base64 File Type, MIME and Size Analyzer
Inspect Base64 and Data URI content to identify the likely file type, MIME type, decoded byte size, signature and validity without uploading the data.
How to use this tool
- Paste your text into the input field.
- Click the action button to process it.
- Copy or download the result.
Privacy
Processed locally; nothing is uploaded.
Raw byte workflow
Convert bytes to image
Analyzing a byte array instead of Base64?
Use Bytes to Image for Uint8Array, Buffer, decimal byte arrays and hexadecimal image data. The tool detects the image signature before previewing it.