Free Complaint Email Generator

Describe the situation and get a subject line and a complete complaint email you can edit before you send.

DocumentUntitled document

LengthStandard

Let’s write an email!

Type a few lines about what you need to say, or paste your notes. Replying to someone? Open Details above and paste their email.

Your email will appear herePick a purpose and tone, describe what to say, then press Generate email. The draft is fully editable.

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Complaint email generator

A complaint email that does its job

A product failed, a service was not delivered, a bill is wrong, a promise was broken — and you want it put right rather than to vent. The Email Writer turns a few lines about the situation into a subject line and a complete complaint email, with the Complaint purpose already selected on this page. A complaint email states what went wrong, with dates and references, what it cost you, and exactly what you want done by when. Calm and specific gets results; angry and vague gets a template reply.

How to write a complaint email here

Three steps, about a minute.

Describe the situation

Say what has happened and what you want to happen, with the real names, dates, amounts and references. A sentence or two is enough; the example below started from one paragraph.

Set tone, length and details

Complaint is already selected. Pick a tone — Professional or Formal. — and a length, and add the recipient and your name in Details so the greeting and sign-off are right the first time.

Read it, change it, send it

Read it as the recipient would. Fix the greeting if it needs fixing, cut a line, swap in an alternative subject. Then copy it, open it in your mail app, or download it.

What a complaint email has to contain

The shape the draft follows, and the shape to check for before you send.

SubjectThe reference and the problem: Order 8841: damaged on arrival, replacement requested.
OpeningWhat you bought or agreed, when, and the reference number — so the reader can find it before reading on.
What went wrongThe facts, in order, with dates. What you have already tried.
The effectWhat it cost you — time, money, a missed event — stated once, without drama.
What you wantThe remedy, specifically: a refund of £X, a replacement by a date, a corrected invoice. And a deadline for a reply.

One brief in, a finished complaint email out

A real run of the tool with the Complaint purpose, unedited.

The brief

Complain to a broadband provider: the engineer appointment on Monday 15 September, 8 am to 1 pm, was missed with no notice; I took the morning off work. Account number 55-2198-7. This is the second missed appointment (the first was 1 September). I want a new appointment within seven days, the missed-appointment compensation their code of practice promises, and a reply within 14 days.

Purpose Complaint, tone Professional, standard length. No recipient or sender name was given in Details, so the greeting and sign-off are the tool's defaults.

The draft returned

Missed Broadband Engineer Appointment

Dear Customer Service,

The engineer appointment scheduled for Monday 15 September between 8 am and 1 pm was missed without any notice, despite me taking the morning off work. This follows a previous missed appointment on 1 September, both linked to account number 55-2198-7. The lack of service has disrupted my internet access and caused unnecessary loss of work time.

I request a new appointment within the next seven days, the compensation outlined in your code of practice for missed visits, and a written reply confirming these actions within 14 days.

Thank you for addressing this promptly.

Regards

Alternative subject: Repeated Missed Service Visit
Alternative subject: Request for Rescheduled Appointment and Compensation

Generated by the Email Writer on 18 September 2026 and printed here unedited. Every date, name and number came from the brief; a draft is meant to be read and edited before it is sent.

Subject lines for a complaint email

Say the thing, front-load the words that identify it, and keep the part that matters inside the first 35–40 characters a phone shows. The tool returns three and shows a live character count.

1Order 8841: damaged on arrival, replacement requested53 characters
2Invoice 2290 charges for a service that was cancelled on 2 September68 characters
3Formal complaint: missed installation appointment, 15 September63 characters

Tone, length and timing

ToneProfessional or Formal. Confident if you have been ignored before. Never Casual, and not Empathetic: this email is about your position.
LengthStandard. Every fact that supports the complaint, and nothing else.
Timing and etiquetteWrite to the right place first — the seller before the card company, the company before the regulator — and say you have. Keep copies. Give a reasonable deadline for a reply (fourteen days is conventional for a formal complaint). If you may escalate — to an ombudsman, a regulator, a chargeback — say so as a fact, not a threat, and only if you mean it.

Common mistakes in complaint emails

Five things readers notice at once, and what the draft does instead.

Anger instead of facts

Insults and capitals give the reader a reason to dismiss the email. Dates and reference numbers do not.

No remedy named

"I expect this to be resolved" lets them choose what resolved means. Name the refund, the replacement, the date.

Missing references

An order number, an account number, a date. Without them the first reply is a request for them.

Threats you will not carry out

"I will be contacting my lawyer" over a £30 lamp costs credibility. State the real next step.

Writing to the wrong person first

Escalating before the seller has had a chance to fix it usually gets you sent back to the seller.

Complaint email generator FAQs

Is the complaint email generator free?

Yes. Write complaint emails without an account, within the per-email word allowance shown next to the composer. Signing in raises it, and Pro removes the guest limits and the ads. The pricing page lists what each plan includes.

What should a complaint email include?

Subject: The reference and the problem: Order 8841: damaged on arrival, replacement requested. Opening: What you bought or agreed, when, and the reference number — so the reader can find it before reading on. What went wrong: The facts, in order, with dates. What you have already tried. The effect: What it cost you — time, money, a missed event — stated once, without drama. What you want: The remedy, specifically: a refund of £X, a replacement by a date, a corrected invoice. And a deadline for a reply.

What tone should a complaint email use?

Professional or Formal. Confident if you have been ignored before. Never Casual, and not Empathetic: this email is about your position.

How long should a complaint email be?

Standard. Every fact that supports the complaint, and nothing else.

Will the tool invent details for my complaint email?

No. Names, dates, amounts, references and links come from your brief and are kept exactly; the tool is built not to add a promise, a policy, a deadline or a fact you did not give it. That is why the brief should carry the real details — the example on this page shows how little is needed.

Can I change the complaint email after it is generated?

Yes. The subject line and the body are editable in the page, two alternative subject lines are one click away, and six one-tap refinements make the draft shorter, longer, friendlier, more formal, more direct or more polite without rewriting the brief. Copy it, open it in your mail app, or download it as Word, PDF or text.

Before you send

Check the draft's grammar, change its tone in one pass, or paraphrase a line that sounds like a template. One plan covers every tool.

Grammar checker Tone changer Paraphraser All purposes

Write a complaint email

Email writers for other purposes

Each page opens the writer with that purpose already selected, shows a real draft the tool returned from a one-line brief, and explains what that kind of email has to do. The purpose menu above the brief covers all sixteen.

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