Encode Files to Base64 for Email

Encode file attachments to Base64 for MIME email construction or debugging email API payloads.

Ei kirjautumista tarvita

Text to encode

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% — use it for files under 1 MB.

Syötä

Enter your data into the tool above. Everything stays local to your browser.

Käsittele

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Lataa

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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