Encode Files to Base64 for Email
Encode file attachments to Base64 for MIME email construction or debugging email API payloads.
Email tips
SMTP email attachments are Base64-encoded within the MIME structure. Email APIs like SendGrid and Mailgun accept Base64-encoded file content.
Paste a Base64 string from an email payload here to decode and verify the attachment content during API debugging.
For the SendGrid API, encode your attachment file as Base64 and pass it in the "content" field of the attachments array.
Large attachments should use a file storage URL instead of Base64 embedding. Base64 increases size by ~33% β use it for files under 1 MB.
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