Encode Files to Base64 for Email

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

Logowanie nie jest wymagane

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.

Wprowadź

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

Przetwórz

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

Pobierz

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

✓Całkowicie darmowe — brak ukrytych kosztów, nigdy

✓Nie potrzeba konta, e-maila ani logowania

✓Pliki nigdy nie opuszczają Twojego urządzenia

✓Absolutnie brak limitów rozmiaru pliku

✓Brak znaków wodnych na żadnych wynikach

Encode API Data in Base64

Encode credentials, tokens, and payloads to Base64

Encode Images to Base64 for CSS

Convert small images and icons to Base64 data URLs

Decode and Inspect JWT Tokens

Decode the header and payload sections of a JSON W

Encode Binary Data for Text Transfer

Encode files or binary data to Base64 so they can