Email signature generator
Fill in the fields, pick a layout and a colour, then copy the result straight into your mail client. The signature is built as a plain HTML table with inline styles — the one format every email client still renders the same way.
Everything is generated in this tab. Your name, phone number and email address are never sent anywhere, never stored, and are gone the moment you close the page.
How the generator works
Every keystroke rebuilds the signature from scratch. The output is a single <table> with every rule written straight onto the element as a style attribute — no stylesheet, no classes, no flexbox, no web font. That is not nostalgia. Gmail strips <style> blocks from pasted content, Outlook on Windows renders mail through the Word engine rather than a browser engine, and several clients rewrite class names to avoid collisions with their own interface. Inline attributes on table cells are the one thing all of them leave alone.
Your values are escaped before they go anywhere near the markup, so an ampersand in O'Brien & Sons comes out as a readable ampersand rather than a broken entity, and a stray angle bracket cannot break out of an attribute. Empty fields are dropped entirely — no blank row, no dangling separator — which is why the compact layout never shows a lonely pipe character when you leave the address out.
The three layouts differ in shape, not content. Stacked puts one detail per line under a coloured rule and suits long addresses. Beside a divider splits your name and role from your contact details with a vertical bar in your accent colour, which reads well on wide screens. Compact folds everything onto one line separated by pipes — the polite choice for people who reply forty times a day inside the same thread.
What belongs in a signature
The useful test is: what would someone need in order to reach you, and what would they otherwise have to ask for? Name, role, company and one reliable phone number cover almost every case. A second phone number, a fax line, three social icons and a motivational quote cover none of them.
Disclosure rules are worth knowing about, because in several countries they are not optional. A limited company registered in the UK must state its registered name, registration number, place of registration and registered office address in its business emails, under the Companies Act 2006. German companies have comparable Pflichtangaben covering the register court, the commercial register number and the managing directors. Ireland, and much of the EU, have their own variants. None of it is onerous — it is three lines in the address field — but the fine for omitting it is easier to avoid than to argue about. Ask whoever handles your company filings what the exact wording should be rather than copying a competitor's.
Why image-free signatures survive
A logo in a signature has to live somewhere. If it is a remote image, Outlook and Gmail both block it by default until the reader clicks "display images", so first contact with a new correspondent shows a grey placeholder box where your brand was meant to be. If it is embedded as base64, Gmail strips it outright and several webmail clients refuse to render it. If it is an attachment, every reply in the thread carries another copy and the paperclip icon makes your message look like it has a document attached when it does not.
Spam scoring makes this worse. Filters weigh the ratio of image to text, and a signature that is mostly picture with a one-line message above it reads to a classifier much like a marketing blast. Remote images that load on open are also the classic shape of a tracking pixel, which is exactly the pattern corporate mail gateways are tuned to distrust. Text with a coloured rule costs you nothing in deliverability and looks identical on a phone, in dark mode, and in the plain-text view.
Size discipline
Your signature is appended to every message you send, and quoted again inside every reply. A 40 KB signature block in a thread of fifteen messages is 600 KB of duplicated markup that someone's mailbox quota has to hold. Gmail stops rendering a message at roughly 102 KB and shows a "Message clipped" link, which in a long internal thread means the newest reply is the thing that gets hidden. The signature this page produces is under 2 KB, and stays under 2 KB regardless of layout.
Questions people ask
Where does my information go?
Nowhere. The page loads one small JavaScript file and then does everything locally — there is no form submission, no request to a server, and nothing is written to cookies or local storage. You can confirm it: open your browser's Network panel, type your details in, and watch that no request goes out. Disconnect from the internet after the page has loaded and the tool still works. That also means there is no saved copy to come back to, so if you want to keep the signature, paste it somewhere before you close the tab.
Which email clients does the generated signature work in?
The markup is deliberately conservative, so it renders in Gmail, Outlook on the web, new and classic Outlook for Windows, Apple Mail, Thunderbird, Yahoo Mail and the major mobile clients. The one thing that varies is colour rendering in dark mode: some clients invert light backgrounds automatically, which can shift a mid-tone accent. If your accent colour matters, test it by sending yourself a message and reading it on a phone with dark mode switched on.
Can I add my company logo?
Not with this tool, on purpose. A hosted logo needs a URL that will still resolve in five years, will be blocked by default in most clients on first contact, and pushes your signature into the image-heavy shape spam filters dislike. If your brand team insists, the usual compromise is to host the file on your own domain, give it a fixed pixel width and a real alt attribute, and accept that a good share of readers will never see it.
Why does my signature look different when someone replies?
Because their client re-renders your markup inside its quoted-text block, often with its own font size, colour and left border applied on top. Outlook in particular collapses margins in quoted content and can force its own paragraph spacing. This is another argument for table cells with explicit padding rather than paragraphs with margins: padding survives the trip much more reliably than margin does.
Should I include a confidentiality disclaimer?
Legally, a boilerplate "if you received this in error, please delete it" notice does very little — you cannot impose obligations on someone by emailing them. In practice, plenty of organisations require one anyway, and some regulated sectors genuinely do. If you must have one, keep it to a single short sentence in small grey text, and put it in the address field of this form so it sits at the bottom of the block rather than competing with your name.