Prompts to summarize any text without losing the key points

Quick answer

A useless summary cuts at random; a good summary knows what you can lose and what you can't. The trick is to tell the AI the purpose of the summary and who it's for, before the "summarize". The prompts below cover the real cases: the long document to understand quickly, the decisions to extract, the text to explain to someone who wasn't there. Copy, paste the text, read only the essentials.

How to use these prompts

The "generic" summary is the most useless: the AI doesn't know what you need, so it cuts at random. Tell it the purpose ("I have to decide whether to read the whole document", "I have to explain it to my boss in thirty seconds") and the cut changes. The same text produces different summaries depending on the question you ask.

One caution that's non-negotiable: for documents where one detail matters (a contract, a diagnosis, a regulation), the summary serves to orient you, not to replace reading the critical point. The AI can leave out the clause that makes the difference. On sensitive texts, use the summary to find the important paragraph, then read that paragraph in full.

The prompt library

Summary to decide whether to read it all

Summarize this text in 5 lines to help me decide whether it's worth
reading in full. Tell me: what it's about, what the thesis or
conclusion is, and who it's really for. If there are parts I can skip,
point them out. No preambles, get straight to it.

Text:

Extract only the points that require an action

From this text extract only what requires an action or a decision from
me. Ignore the context and the explanations. Output: a list of points,
each with what I have to do and, if there is one, by when. If there's
nothing to do, tell me clearly.

Text:

Three-level summary

Summarize this text at three levels, from shortest to longest:
1. A single sentence.
2. Three points.
3. A ten-line paragraph with the details that matter.
This way I choose myself how deep to go.

Text:

Explain it to someone who wasn't there

Summarize this text for a person who knows nothing about it and has two
minutes. Explain the technical terms at first occurrence, keep the
important numbers and dates, drop the jargon. They have to be able to
repeat the gist to someone else after reading it.

Text and who it's meant for:

Compare two texts and tell me what changed

Compare these two texts and tell me only what changed from the first to
the second: additions, cuts, substantive modifications. Ignore mere
differences of form. Output: a list of the differences that change the
meaning.

Text 1:
---
Text 2:

A concrete example

Davide receives an eleven-page supply contract and has twenty minutes before a call with the supplier. He can't read it all. He first uses the three-level summary: the single sentence tells him it's an annual contract with automatic renewal; the three points flag penalties, payment terms and the termination clause.

At this point he doesn't trust the summary on the penalties, which is the point that would cost him dearly. He uses the "extract the points that require an action" prompt to have it point out where the deadlines are, then goes to read those two paragraphs in full in the contract. He discovers that termination must be communicated ninety days in advance, a detail the summary had named but not quantified. He goes into the call knowing where to look. The summary saved him eighteen minutes and pointed out the two points not to delegate.

When it does NOT work (and how to fix it)

If it cuts exactly the point you needed

A generic summary decides on its own what's important, and sometimes it's wrong. The fix is to declare in advance what you're looking for: "summarize, but don't leave out anything about prices, deadlines and penalties". The AI protects what you mark as priority.

If the text is too long and the AI loses pieces of it

On very long documents some models "forget" the middle part. Break the text into blocks, have each block summarized, then ask for a summary of the summaries. Or use a tool with a wide context window, that is, capable of keeping more text in mind at once.

If it invents a detail that's not in the text

When a summary contains a number or a name you don't remember in the text, verify it. To reduce the risk, add "use only what's written in the text, don't add external information". The AI stays inside the document instead of filling the gaps with its general knowledge.

A tip from someone who actually uses it

Never just ask "give me a summary": it's the request that wastes the tool. Ask "summarize for [precise purpose]". The same article, summarized "to decide whether to share it" or "to use it in a report", produces two different texts and both useful. The purpose is half the prompt.

Frequently asked questions

How much can I trust an AI summary of an important document?

Trust the orientation, not the critical detail. The summary quickly tells you where to look and what it's about. But the clause that costs you, the figure that makes the difference, the medical data: those are read in the original. The summary is the map, not the territory.

Does summarizing with AI make me read less and understand worse?

It depends on the use. If you replace every reading with a summary, you understand half of it. If you use the summary to skim what deserves a full read, you read less rubbish and more of what matters. The tool shifts attention where it's needed, it doesn't switch it off.

Is a shorter summary always better?

No, and it's the most common mistake. A summary that's too short loses the nuances that change the meaning: "the project is proceeding" is not the same as "the project is proceeding but the budget is already twenty percent over". The right length is the one that preserves the points that would change a decision of yours, not the shortest possible.