The Best AI Prompt to Shorten a Long Email
Turn a long email into a shorter, ready-to-send draft that keeps the key facts, original tone, and requested action.
Shorten the email below while preserving its meaning, essential details, intended tone, and requested action. Inputs: Original email: [PASTE EMAIL] Target length, optional: [TARGET LENGTH] Desired tone, optional: [DESIRED TONE] Constraints: Remove repetition, filler, and background that the recipient does not need. Keep key facts, names, dates, deadlines, commitments, and any conditions that affect the meaning. Preserve who is responsible for each action and whether a statement is certain, tentative, or conditional. Do not invent information, strengthen promises, or change the sender's intent. Preserve the original tone unless a different tone is supplied. If no target length is given, aim for about half the original word count, but keep more words if needed to retain essential information. Use short paragraphs and keep any existing subject line accurate. If an essential detail is missing or ambiguous enough to affect the rewrite, ask up to three short questions before rewriting; otherwise proceed. Output format: Return only the shortened email, ready to copy and send. Do not add an explanation, a word-count note, or a new subject line unless requested.
Use this prompt when an email has too much background or repeats the same point. It helps ChatGPT cut the extra wording without losing the details your recipient needs to understand the message and respond.
How to use this prompt
- Open a new conversation in ChatGPT and paste the main prompt.
- Replace [PASTE EMAIL] with your email text. Remove sensitive information or replace it with consistent labels such as Client A.
- Fill in a target such as “about 120 words” and a tone such as “friendly and direct,” or leave those optional inputs blank.
- Send the prompt and answer any clarification questions ChatGPT asks.
- Compare the rewrite with your original, checking names, deadlines, commitments, and the requested action before copying it into your email app.
Practical tips
- If an important detail disappears, reply: “Restore the detail about [DETAIL] and cut less important background instead. ”
- If the rewrite sounds abrupt, reply: “Keep this length, but make the wording warmer without adding a generic opening. ”
- If a tentative statement becomes a promise, reply: “Keep the original level of certainty. We may be able to do this; we have not committed to it. ”
- If the email is still too long, reply: “Cut another 25% by removing repeated explanations. Keep the deadline and requested action explicit. ”
Prompt variants
Under 100 words
Use when you need a firm length limit for a quick email.
Shorten the email below to no more than 100 words while preserving its meaning and requested action.
Original email: [PASTE EMAIL]
Remove repetition and unnecessary background. Preserve essential facts, names, deadlines, commitments, and conditions. Keep the original tone and level of certainty. Do not invent information or change who is responsible for an action. If the word limit would force you to omit essential information, ask up to three short questions about what can be cut before rewriting.
Return only the shortened email, ready to send, with no explanation or word-count note.Bullet-point email
Use when the email contains several updates or action items that are easier to scan as bullets.
Shorten the email below into a brief opening sentence followed by bullet points and a closing request, if the original includes one.
Original email: [PASTE EMAIL]
Target length, optional: [TARGET LENGTH]
Remove repetition, filler, and unnecessary background. Keep the original tone, essential facts, names, dates, commitments, and conditions. Preserve who needs to do what and by when. Do not invent a request or add information. If no length is supplied, aim for about half the original word count without losing essential details. If an ambiguity would change the meaning, ask up to three short questions before rewriting.
Return only the email in the specified format, with no explanation.For a non-specialist recipient
Use when writing to someone outside your team or specialty who needs a plain-language version.
Shorten the email below for a recipient who is unfamiliar with the subject's specialist terminology.
Original email: [PASTE EMAIL]
Target length, optional: [TARGET LENGTH]
Replace unnecessary jargon with plain language, but retain technical terms needed for accuracy and explain them briefly where necessary. Remove repetition and background the recipient does not need. Preserve the original tone, key facts, names, dates, commitments, conditions, and requested action. Do not invent information or change the sender's intent. If no length is supplied, aim for about half the original word count while keeping essential details. If a technical term or essential detail is unclear, ask up to three short questions before rewriting.
Return only the shortened email, ready to send, without an explanation outside the email.Frequently asked questions
How do I ask ChatGPT to shorten an email without losing important details?
Paste the email into the prompt and specify which details must stay, such as a deadline or a condition attached to an offer. Check the result against the original, because a shorter draft can still leave out something important.
How short should a business email be?
Choose a length that lets the recipient understand the message and act on it without extra explanation. Try about half the original length first, then keep more words if the email includes several decisions or commitments.
Can ChatGPT shorten an email without making it sound rude?
Yes, you can ask it to preserve a friendly or respectful tone while cutting repeated explanations. If the result feels abrupt, request a warmer version at the same length and keep any meaningful acknowledgment or thanks.
Should I paste confidential emails into ChatGPT?
Remove sensitive details before sharing an email and follow any rules your workplace sets for using AI tools. Replace private names or figures with consistent labels, then restore the correct details in your final draft.