Design it visually, then copy clean, email-safe HTML.
Leave a field empty to hide it.
Shown small and muted after your name.
Shown above your name in templates that have one.
Shown in templates with a tagline line.
Licence numbers, office hours, anything else.
It writes the code for you. Design the signature visually, then press Copy HTML to get the raw source for Thunderbird, Spark or any other app that asks for HTML instead of pasted formatting. Copying the HTML is free and needs no account.
The code follows the rules that keep a signature intact across email apps: layout from nested tables, styles written inline on each element, images on absolute HTTPS addresses with alt text, and a width of up to 600 px. The editor shows the size against Gmail’s 10,000-character limit while you edit.
Right-to-left signatures carry dir="rtl", so Arabic and other right-to-left scripts mirror correctly and phone numbers stay readable.
Windows, macOS, Linux · About a minute
Copy the HTML source. Press “Copy HTML” in Sendoff.
Open account settings. Open the menu, Account Settings, and select your address.
Enable HTML. Tick “Use HTML” next to “Signature text”.
Paste and close. Paste the HTML into the box. Changes save automatically.
macOS, iOS, Windows · About a minute
Copy the HTML source. Press “Copy HTML” in Sendoff.
Open signatures. In Spark open Settings, then Signatures, and click +.
Switch to HTML. Choose the HTML editing option, paste and save.
Email apps strip much of what web pages rely on. Safe signature HTML uses tables for layout, inline styles on each element, images on public HTTPS addresses with set sizes and alt text, and a width of about 600 px at most. Classic Outlook, which renders with Word, is the strictest test.
Yes. Copy HTML works on the free plan without an account. Free signatures end with a small “Made with Sendoff” line, which the Solo plan removes.
Not into their signature settings: Gmail, Outlook and Apple Mail expect formatted content, not code. For those apps, press Copy signature and paste the formatted version. Use Copy HTML for apps with an HTML option, such as Thunderbird or Spark.
Yes. Paste it into the free signature checker. It flags what breaks in Gmail and Outlook, such as style blocks, flexbox, base64 images, missing alt text and size over Gmail’s limit.
Yes. Making and copying a signature here costs nothing, with no time limit. Free signatures end with a small “Made with Sendoff” line, which the Solo plan removes.
No. Fill in the form and copy your signature without signing up. Create a free account only to save your signature for later edits or to try a PRO template.