01Add a signature in Gmail
Click Settings (gear) › See all settings
Stay on the General tab and scroll to Signature
Click Create new and name the signature
Paste your signature in the editor
Set defaults for new emails and for replies/forwards
Use the dropdowns under Signature defaults.
Scroll to the bottom and click Save Changes
Gmail General › Signature. Checked 2 Nov 2026.
02Add a logo to your Gmail signature
Click Insert image in the signature editor. You can upload, pick from Drive, or use a web address. Drive files must be shared with Anyone with the link. Web address is lightest for Gmail's character limit.
03Gmail signature size limit
Gmail allows up to 10,000 characters per signature, and images count toward that limit. If you see The signature is too long, use hosted images and trim duplicate styles. See the Gmail too-long fix page and the embedded size meter.
Preview in Gmail before you copy
FAQ
How do I add a signature in Gmail?+−
Open Settings › See all settings › General › Signature, create a signature, paste your content, set defaults for new messages and replies, then Save Changes at the bottom of the settings page.
How do I add a logo to my Gmail signature?+−
In the signature editor, click Insert image and upload, choose Drive, or use a web address. Drive images must be shared with Anyone with the link. Images count toward the 10,000-character limit, so hosted URLs are smaller than pasted images.
Why does Gmail say my signature is too long?+−
Pasted images and duplicated HTML from Word or AI tools inflate character count. Clear the box, use Insert image › Web Address for logos, and rebuild with table-based HTML. Check size with the Gmail fix page meter.
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