Email signature generator, mail merge & mailto links
An email signature generator builds the professional HTML block — name, role, logo, links — that sits under every message you send. Carbide's email signature generator does it free, with no sign-up, no lead form and no watermark, and you copy the result straight into Gmail, Outlook or Apple Mail.
This guide covers the whole email-composition trio: designing the signature and installing it in each mail client, running a mail merge with {{placeholders}} to personalize one message per recipient, and building a proper mailto link with subject, body, cc and bcc. All three tools run in your browser — nothing you type is uploaded.
Design a professional HTML email signature — no sign-up
A good signature answers three questions at a glance: who you are, what you do and how to reach you. In the email signature generator you fill in your name, role and company, add your logo, then attach the links that matter — website, phone, and social profiles. Pick an accent color that matches your brand and the tool assembles clean HTML that renders correctly in mail clients.
The difference from the big-name generators is what happens at the end. HubSpot asks for your contact details before it hands over the signature; WiseStamp adds its own branding to the free tier. Here there is no lead form, no watermark and no account — the preview you see is the signature you get, ready to copy. If you want to fine-tune the markup afterwards, paste it into the HTML editor and adjust it with a live preview.
Add your signature to Gmail, Outlook and Apple Mail
Every mail client hides the signature setting in a slightly different place, but the pattern is the same: copy the rendered signature (not the raw code), paste it into the client's signature box, and save. The steps for the three most common clients:
- Gmail: click the gear icon → See all settings → General → scroll to Signature → Create new → paste → Save changes at the bottom.
- Outlook (web): Settings → Account → Signatures → paste into the editor → set it as the default for new messages → Save.
- Apple Mail (Mac): Mail → Settings → Signatures → choose your account → click + → paste into the right-hand pane.
- Expected result: send yourself a test email — the signature should show your logo, formatted text and clickable links, not a block of code.
Mail merge without Word — how {{placeholders}} work
Mail merge classically meant Word, Excel and a wizard from 2003. The online version is simpler: you write one message template and mark every personal detail as a placeholder in double curly braces — "Hi {{name}}, your order {{order}} ships on {{date}}". The mail merge tool then fills those placeholders from rows of data and produces one finished message per recipient.
There is nothing to install and no add-on to authorize: no Word, no Excel, no Gmail extension asking for inbox access. The merge happens entirely in your browser, which also means your recipient list — names, emails, order numbers — never leaves your device. One honest limitation to know up front: the tool generates the personalized text; it does not send email. You paste each result into your own mail client or messaging app, which keeps you in control of what actually goes out.
Paste CSV rows and generate one message per recipient
The data side is a simple table you can paste straight from a spreadsheet or CSV export. The first row holds the column names — those become your placeholder names — and every following row is one recipient.
- Write the template with {{placeholders}} matching your column names exactly.
- Paste your rows: a header line like name,email,date, then one line per recipient.
- Check the preview — the first recipient's message shows every placeholder filled.
- Copy the results: each message is ready to paste, personalized end to end.
- Expected result: 20 rows in, 20 finished messages out — same wording, each with the right name and details.
Build a mailto link with subject, body, cc and bcc
A mailto link opens the reader's mail client with a message already addressed and pre-filled — ideal for "Contact us" buttons, support links and QR posters. Writing one by hand is fiddly because everything after mailto: must be URL-encoded: spaces become %20, line breaks become %0A, and one wrong character silently truncates the subject. The mailto link generator handles that for you — enter the recipients, cc, bcc, subject and body, and it produces both the encoded link and a ready-to-paste HTML anchor tag.
It also shares the finished link as a QR code, so a printed flyer or a slide can open a pre-filled email on any phone that scans it. If you use QR codes elsewhere, the QR generator covers links, text and Wi-Fi — the QR code guide and the free QR generator post explain the details.
Free means free — nothing uploaded, no catches
All three tools follow the same rule as the rest of Carbide: the page loads once, then the work happens locally in your browser. Your signature details, your recipient table and your mailto text are processed on your device and never sent to a server — there is nothing to store, leak or add to a mailing list. That is also why none of the tools ask you to sign up: there is no server-side quota to meter.
The email toolkit rounds out with two neighbors worth knowing. The email extractor pulls every address out of a pasted document and dedupes the list — a quick way to build the recipient column for a merge — and the email validator checks syntax, domain and MX records before you send. Both are covered in the email validator and extractor guide.
Frequently asked questions
How do I add a signature in Gmail?
Open Gmail's gear icon → See all settings → General → Signature → Create new, paste the signature you copied from the email signature generator, then click Save changes at the bottom of the page. Set it as the default for new emails so it appears automatically.
Does the mail merge tool actually send the emails?
No — and that is deliberate. The mail merge tool generates one personalized message per row of data; you paste each result into your own mail client or messaging app to send it. Nothing goes out without you pressing send yourself.
Is my signature or recipient data uploaded anywhere?
No. The signature builder, the merge and the mailto generator all run client-side in your browser — names, emails, logos and message text are processed on your device and never uploaded. There is no account and no list your address could end up on.
How do I add a subject and body to a mailto link?
Append them as URL parameters: mailto:someone@example.com?subject=Hello&body=Your%20message. Spaces must be encoded as %20 and line breaks as %0A, which is easy to get wrong by hand — the mailto link generator encodes everything correctly and gives you the HTML anchor too.
Is the email signature generator really free — no watermark or lead form?
Yes. There is no sign-up, no lead form collecting your contact details, no watermark or "Sent with…" branding in the output, and no paid tier hiding the copy button. What you design is exactly what you paste into your mail client.
A polished signature, personalized messages and working mailto links are three small jobs that make every email you send look deliberate. Start with the email signature generator, run your next batch of messages through mail merge, and wire your contact buttons with the mailto link generator — free, in your browser, with nothing uploaded.