Thunderbird Signature Generator
Create a polished signature for Mozilla Thunderbird below, then add it to your account settings -- formatted to work with Thunderbird's HTML signature option.
- No HTML or design skills required
- Works with the clients your team already uses
- Free to create, preview and copy
Build your Thunderbird signature
Open the Signaturely builder to choose a template, add your logo and contact details, then copy the finished signature. Once it is on your clipboard, come back and follow the Thunderbird install steps below.
Want to see finished layouts first? Browse email signature examples.
- Design your signature
- Copy the generated signature
- Paste it into Thunderbird
- Send yourself a test email
How to Add Your Signature to Thunderbird
Follow these steps in Thunderbird to install the signature you just created.
Open Account Settings
Open Thunderbird, click the menu icon, then select Account Settings.
Select Your Account
Choose the email account you want to add the signature to from the left-hand panel.
Enable HTML Signature
Check the box labeled Use HTML so your formatting, links, and images render correctly instead of as plain text.
Paste Your Signature
Paste your generated signature into the signature text box.
Save Settings
Click OK to save, then compose a test email to confirm the signature displays properly.
Frequently Asked Questions
Everything you need to know about Signaturely. Can't find the answer you're looking for?
You likely haven't checked the Use HTML box in Account Settings. Without it, Thunderbird treats your signature as plain text and displays any HTML tags literally instead of rendering them.
Yes -- Thunderbird also supports loading a signature from an external HTML file by checking Use HTML and selecting Choose to link a local .html file, though pasting directly is simpler for most users.
If your image is linked via URL rather than embedded, some recipients' mail clients may block remote content by default. Where possible, use an image hosted on a reliable, always-on URL.
Yes -- each account added to Thunderbird has its own independent signature setting under Account Settings, so you can customize signatures per account.
Still have questions? Contact our support team
Signature generators for other platforms
Setting up a different inbox? Pick your client and get the matching install guide.
Ready to create your Thunderbird signature?
Design it free in the Signaturely builder, then paste it into Thunderbird using the steps above.
Create Your Signature Now