Cold Email Generator

The Cold Email Generator writes a short, direct cold email based on three inputs: who you are, who you're emailing, and what you're asking for. No subject-line filler. No "hope this email finds you well." Three sentences max, a real subject line, your name at the bottom. Pick a tone — direct, friendly, formal, playful, to-the-point — and the generator adjusts the register without losing the brevity. Most cold emails fail because they're too long, too vague, or read like a template. This tool's job is to give you the opposite: a draft that reads like a real person sent it, written in 30 seconds.

Built by Bob Article by Lace QA by Ben Shipped May 15, 2026

How to use

1
Enter your name or role in the "From" field. Optional — leave blank if you'd rather the email just gets to the point.
2
Enter the recipient's name or role in the "To" field. Optional, but adds context. "Head of Partnerships at Acme" is better than blank.
3
Describe the ask in one sentence. Be specific. "A 20-minute call next week" beats "discuss potential collaboration."
4
Pick a tone. "Direct but warm" is the default and works in most contexts. "Formal" for executive recipients; "playful" for creative pitches.
5
Click "Write the email." You'll get a subject line + 2-3 sentence body + sign-off. Read it, tweak it, send it.
6
If the first draft isn't right, click "Try another." Each click generates a fresh take on the same brief.

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Frequently asked questions

Why are these emails so short?

Because long cold emails don't get replies. The data on this is consistent: emails under 100 words have ~50% higher reply rates than emails over 200 words. The recipient is on their phone, between meetings, scanning. Your job is to make the ask, give one reason, and close. Three sentences is enough for almost every cold-email scenario except very high-context B2B sales — and even then, you're better off following up with a longer email after they reply.

Will the emails sound AI-generated?

We deliberately strip the patterns that flag AI generation: no "hope this email finds you well," no "unlock your potential," no "leverage," no "synergize." The system prompt enforces short sentences and a real-person voice. That said, AI is AI — if you want it to sound exactly like you, treat the output as a draft and rewrite one or two sentences in your own voice before sending. Most users do this.

Is my input stored anywhere?

Not permanently. The Worker that runs this tool keeps a 7-day content-hash cache so identical inputs return identical outputs (saving an AI call and your free-tier quota). The cache key is a hash — no plaintext of your inputs is stored. Standard Cloudflare access logs (IP + timestamp + URL path) are kept per their retention policy. We don't sell, share, or train models on your input.

How much does this cost me?

Nothing for free use. Anonymous visitors get 5 generations per day per IP. Signed-up users get 25. Microapp Members get 200 per day, refilled at midnight UTC. The actual AI compute (OpenAI's API) costs us about $0.0005 per generation — your free quota costs us pennies a year per user, which is fine. If you blow through the free tier, that's the signal to sign up; if you blow through the signed-up tier, that's the signal to become a Member.

Why does my generated email sometimes have a different tone than I picked?

The tone affects vocabulary, sentence length, and politeness markers — but the underlying ask stays the same. "Playful" applied to a deeply formal ask ("requesting your participation in our quarterly compliance review") will still read fairly formal because the topic doesn't bend. If you want a more dramatic tonal shift, rephrase the ask itself in the tone you want — the generator follows the ask's register more than the tone setting.

Can I use these emails in a real outbound campaign?

For one-off cold emails, absolutely — that's the use case. For bulk campaigns (>50 recipients), you should be using a proper outbound tool (Smartlead, Instantly, Lemlist) with their own personalization variables and reply tracking. This tool generates one email at a time; it doesn't do mail-merge, doesn't track opens, and doesn't manage send schedules. Treat it as a fast draft tool, not a campaign system.

Ratings & Reviews

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What this tool does

The Cold Email Generator writes a short outreach email from three inputs: who you are, who you're emailing, and the ask. The output is one subject line + two to three sentences + your name. No "hope this finds you well." No "I wanted to reach out." Just the message.

Why short cold emails win

The reply-rate data on cold email length is consistent across studies — Boomerang's analysis of 40 million emails, Yesware's reply-rate benchmarks, Hubspot's outbound dataset. Emails between 50 and 125 words consistently outperform longer emails by 30–50% on reply rate. The reason is unsurprising: the recipient is reading on a phone, between meetings, in 5-second bursts. If they have to scroll to find your ask, you've lost.

Short emails are also harder to write than long ones. It takes more thinking to compress an ask into three sentences than to ramble for ten. That's where the generator helps — it does the compression mechanically, so you don't have to wrestle with the form. You provide the substance; it provides the structure.

The output format

Every generated email follows the same shape:

Subject line — under 50 characters, specific, not "Quick question." Specificity is what gets the open.
Sentence 1 — context. Who you are and why you're emailing this specific person.
Sentence 2 — the ask. One verb, one timeframe, one specific outcome.
Sentence 3 (optional) — the reason it's worth their time, or the next step if they say yes.
Sign-off — your name. No "Best regards" filler.

Tones, briefly

Direct but warm — the default. Works for most B2B and partnership outreach.
Friendly — informal, first names, light contractions. Good for community / creator outreach.
Formal — executive recipients, legal/compliance contexts, anything where "Dear" still belongs.
Playful — creative pitches, designer/agency outreach, anything where personality is the differentiator.
To the point — for second-touch follow-ups or recipients you know are time-poor.

What it won't do

This generator writes one email at a time. It's not a campaign tool — it won't manage send schedules, track opens, or do mail-merge over a list. For bulk outbound use a proper outbound platform (Smartlead, Instantly, Lemlist) with their personalization variables. Treat this as the fast-draft tool you reach for when one specific cold email needs to be written and sent in the next 30 seconds.

It also won't write 600-word emails. By design. If your ask genuinely needs that much context, you're better off writing a short "Are you the right person to talk to about X?" email first, getting a reply, and then sending the long version. That's the standard cold-outbound playbook and the data backs it up.