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Tools›Base64 invoice attachment decoder
Free browser tool

Base64 invoice attachment decoder

Decode embedded Base64 attachment text, inspect the MIME hint and download the recovered file locally.

Base64 invoice attachment decoder

Decode embedded Base64 attachment text, inspect the MIME hint and download the recovered file locally.

Processed in your browserNo file storage
Methodology

Base64 invoice attachment decoder · EInvoiceLab

Decode Base64 attachment text, review a safe text preview and download the recovered bytes with a chosen MIME type and file name.

What the tool checks

  • Base64 syntax
  • Decoded byte count
  • MIME and file-name metadata
  • Readable preview when available
What it cannot confirm

Technical check only

  • Downloaded files can still be unsafe
  • The declared MIME type is not independently verified