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Working demo, not a client project

Type a short brief. Get a ready-to-send, on-brand newsletter in minutes.

Try it below with your own brief, or read how it works first.

Try it now Ask about one for your team
How it works

One brief in. A finished email out.

Three stages, each with its own check. Nothing is sent anywhere; you get the HTML.

  1. 1 · Brief

    You write a few lines

    • org
    • topic
    • key_points
    • cta_label
    • brand_color
  2. 2 · Generate

    Checked, written, illustrated

    1. Safety check on the brief
    2. Copy as validated JSON: 3 subjects, preheader, body
    3. Hero image, illustrative, no realistic people
    4. Assembly into a table-based, Outlook-safe template
  3. 3 · Result

    Ready to use

    Pick a subject line, check the preview, then copy or download the HTML.

    Copy HTMLDownload
Try it

Write a brief. Get a newsletter.

Working demo, not a client project. Up to 3 runs per visitor per day. Please do not enter personal or confidential details.

Usually takes about 30 seconds. Nothing is sent; you get the HTML to copy or download.

Nothing generated yet. Keep the sample brief or write your own, then press Generate.

  • 3subject lines
  • 1preheader
  • 1hero image
  • 1HTML email

Your newsletter

Subject line options

    Preheader

    Before / after

    What staff type, and what they get.

    Before: the brief
    Organisation: Greenleaf Community Garden
Topic: Autumn planting day
Key points:
  Planting day is Saturday 7 November, 10am to 1pm
  We need 30 volunteers
  Tools, gloves and tea are provided
Button text: Sign up to volunteer
Brand colour: #2F6B3F
    After: the finished email
    Why it helps

    Less time writing, same look every time.

    Write a few lines, not a whole newsletter

    Staff write a few lines instead of drafting and formatting a whole newsletter.

    On-brand every time

    Your colours, name and layout are built in, so every email looks like you.

    You own the keys and costs

    It runs on your own AI account. You see and control the running cost; we don't mark it up.

    The deal

    What you get, and what we need from you.

    What you get

    • A simple brief form for your staff
    • Subject lines and copy written in your tone
    • An email template in your brand that works in Outlook and Gmail
    • A preview, plus Copy HTML and Download HTML, with nothing sent automatically
    • Setup help and a short handover guide

    What you provide

    • Your AI account and API key (you pay its usage directly)
    • Your logo, colours and a sample newsletter you like
    • Where it should run (your website or server)
    • One person to test it and give feedback
    For your developer
    • The form posts to a Cloudflare Pages Function at /api/generate. Keys stay on the server.
    • By default it uses Cloudflare Workers AI: a safety check on the brief, then copy from a JSON-schema response that is validated on the server (one retry, then a template fallback), then an illustrative hero image.
    • OpenAI is an optional switch, using a forced tool call with a strict schema and gpt-image-1 at low quality.
    • Limits: 3 runs per visitor per day, a daily cap for the whole demo, input length checks, and an optional Turnstile check.
    • The email is table-based with inline styles, alt text and a VML button for Outlook.

    Download the earlier PHP source (zip)

    Want one built for your team?

    Send a few lines and we'll reply with a fixed quote.

    Email hello@knowvalabs.com