Embed a Live Fundraising Thermometer Inside Any Email Newsletter
Gmail, Outlook, Apple Mail, Mailchimp, and Substack strip out JavaScript widgets—but they display standard images natively. Because DonationsTracker renders live PNG graphics on our servers, your thermometer updates automatically every time a subscriber opens your email.
Why Traditional Fundraising Widgets Fail in Email
Nearly every crowdfunding and donation widget on the market relies on JavaScript (`<script>`) or `<iframe>` embeds. For security reasons, email clients like Gmail, Apple Mail, and Outlook completely block scripts and iframes. Until now, fundraisers had to take a static screenshot of a thermometer and paste it into their email—meaning the graphic was already outdated five minutes after sending the blast.
How DonationsTracker's Dynamic PNG Email Widgets Work
Paste the Image URL
Insert your campaign's Thermometer, Horizontal Progress Bar, or Recent Donors PNG link into Mailchimp, Substack, Constant Contact, ConvertKit, or any HTML email editor.
Instant Webhook & IPN Sync
Whenever a reader donates via PayPal, Stripe, or Ko-fi, our real-time webhook listener immediately redraws the PNG image on our servers.
Always Current on Open
Whether a subscriber opens your email 10 minutes or 3 days after you hit send, they see your up-to-the-minute fundraising total and latest donor names.
Works With Every Email Platform
Because it is a standard HTML `<a>` link wrapping a standard `<img>` tag, it works out of the box with:
- Mailchimp & Constant Contact: Drop into a Code block or use the image URL in an Image block linked to your `/donate` URL.
- Substack & beehiiv: Embed live sponsorship or reader-support goal bars at the bottom of every post.
- ConvertKit (Kit), MailerLite & ActiveCampaign: Add live year-end Giving Tuesday thermometers to your automated sequences.
Try It in Your Next Newsletter — Free for 14 Days
0% platform fees. Keep 100% of your donations. Then just $12/mo or $108/yr.