⚡ TL;DR
The four-part structure, the two phrases that should never appear, and the free tools that will proofread, paraphrase, and tone-check the result.
The four-part structure
A professional letter or email has four parts: (1) the reason you are writing, in the first sentence; (2) the thing you want, in the second sentence; (3) the evidence that you are worth the recipient's time, in one or two short paragraphs; (4) the specific next step, in the closing sentence. Most people write the second and third parts and skip the first and fourth. The first sentence is the most important: if the recipient does not know what you want within the first ten words, they will assume the rest is the same.
The two phrases that should never appear
"I hope this email finds you well" and "I would be a great fit for this role". The first is filler. The second is an opinion, not evidence. Replace the first with the reason for the email. Replace the second with one specific, verifiable fact: a number, a result, a project. "I led the migration of 12,000 customer records to the new CRM, with zero downtime" is an argument. "I would be a great fit" is a wish.
Cover letters
A cover letter is a one-page argument that you are worth a 30-minute interview. It is not a summary of your resume. It is a single, specific, falsifiable claim about what you have done that is relevant to the job, plus the evidence for it. Three paragraphs is the right length. The first names the role and the specific thing about the company that attracted you. The second is the claim and evidence. The third is the next step: a specific time you are available to talk.
Resumes
A resume is a one-page list of evidence. Verbs at the start of each line ("led", "shipped", "cut", "grew"), numbers attached to the outcomes ("by 22%", "across 14 sites", "to 1.3 M monthly users"). The reader skims in 10–20 seconds. If the first verb on each line is not specific, the reader assumes the rest is the same. The free resume builder on this site scaffolds this structure.
Business emails
A business email should fit on one screen. If the recipient has to scroll, you have written a memo, not an email. The first sentence is the ask. The second sentence is why. The third sentence (if needed) is the supporting fact. The closing sentence is the next step. The free email template generator on this site will scaffold this for common scenarios — chasing an invoice, declining a meeting, escalating a blocker.
What this site gives you
A cover letter builder, a resume builder, an email template generator, a grammar checker, a paraphrasing tool, a proofreading and style checker, and a readability scorer. All of them run in your browser; none of them upload your draft anywhere.
🛠️ What this site gives you for Writing & Language
Free, browser-side tools related to this topic. No sign-ups, no display ads.
❓ Frequently asked questions
How long should a cover letter be?
Three short paragraphs on one page. If the cover letter is longer than the resume, something is wrong.
Should I address a cover letter to a specific person?
Yes if you know it. "Dear Hiring Manager" is acceptable; "Dear Sir/Madam" or "To whom it may concern" is not.
How long should a resume be?
One page for most roles. Two pages is acceptable for senior roles with 10+ years of relevant experience. Never three pages unless you are a doctor or a researcher with a publication list.
Should I use AI to write a cover letter?
You can use it to draft, but you should rewrite the opening and the specific evidence in your own words. A cover letter that reads like a template is worse than no cover letter, because it tells the reader you did not care enough to write one.
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