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I have an embedded HTML email in which I'm using a base64 encoded image. Image doesn't show in gmail when accessing via chrome. But it works fine when accessing same mail via mail client(Mail application on Mac). I have set headers correctly. Any idea?
My code
<html>
<body>Hi
<img src="data:image/png;base64,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" width="273" height="11" alt="">
</body>
</html>
Headers
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable
937
Gmail does not support base64 embedded images.
If images don't load in Gmail, check your settings. On your Android phone or tablet, open the Gmail app . your account. Under "Data usage," tap Images.
The good news is that Apple email client is friendly to base64 encoded images and has a good chance of instantly displaying them.
Google's Gmail website automatically blocks many email images until it's sure the messages are coming from a trusted source. You can't instruct Gmail to always show images from all senders, but you can allow images from certain senders by clicking "Always Display Images From …" at the top of their messages.
base64 encoded images are not well supported in email. They aren't supported in most web email clients (including Gmail) and are completely blocked in Outlook. Apple Mail is one of the few clients that does support them, that's why you're able to see them there but not elsewhere.
Another thing to be mindful of with base64 encoded images is email file size. Gmail App (iOS, Android) and Outlook (iOS) truncate email messages whose file size exceeds 102KB. Remotely referenced images (Eg. <img src="http://www.website.com/image.png"> do not count towards the email's file size, but base64 encoded images do and can quickly blow out an email's file size past the 102KB limit. Just something else to consider.
73
It looks like that direct encoded images (non-bease64 ) are also not supported by gmail :( - I write below snippet to convert image from base64 to direct form and send it in email - but still not see any image :( . To solve this issue you need to add images as attachements with cid and use that cid in img tags <img src="cid:123456"> - more details here
function convert() {
let base64 = imageBase64.value.split('base64,')[1];
let hex = [...atob(base64)].map(c => c.charCodeAt(0).toString(16).padStart(2, 0));
let img = 'data:image/png,%' + hex.join('%');
pic.src = img;
msg.innerText = img;
}Put your img base64 data uri here<br>
<input style="width:200px" id='imageBase64' value="data:image/bmp;base64,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">
<button onclick="convert()">Convert</button><br> Result
<br>
<textarea id='msg' rows="4" cols="50"></textarea><br>
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