How long can the text be?

It depends on the AI model you choose. Models with larger context windows can summarize longer documents in one pass — pick one of those for long articles or threads.

Does summarizing require a separate AI app?

No. The Summarize transform is built into ClipHistory. You only supply your own API key for the provider you pick.

Is there an ongoing cost?

ClipHistory is a one-time $19.99 purchase with no auto-renewal. You pay your AI provider directly for the tokens each summary uses, at their rate.

Where does my text go when I summarize it?

Only to the AI provider you configured, using your own key. ClipHistory has no cloud and no account, so nothing is stored on a ClipHistory server.

Summarize Long Text on Mac With a Shortcut

You copied a 2,000-word article, a long email thread, or a wall of meeting notes, and you need the gist now. Opening a separate AI app, pasting, prompting, and copying the result back is a lot of friction for something you do a dozen times a day. A clipboard manager with a built-in summarize transform turns it into one shortcut.

The one-shortcut flow

ClipHistory keeps your last 150 clips and can run AI transforms on any of them.

Select and copy the long text.
Press Cmd+Shift+V to open ClipHistory.
Choose the clip and run the Summarize transform.
The summary replaces the clip — paste it into your notes, a reply, or a doc.

That's it. No second app, no manual prompting. The text you copied becomes a summary you can paste.

Why the clipboard is the right place for this

Summarizing is almost never the end goal — it's a step toward writing a reply, briefing a teammate, or deciding whether to read the full thing. Doing it on the clipboard keeps you in flow:

Both versions are kept. The original long clip and the summary both live in your history, so you can go back to the source.
It works from any source. Web page, PDF, email, chat — if you can copy it, you can summarize it.
One shortcut, everywhere. The same Cmd+Shift+V action works system-wide.

Choose the model that fits the length

Summarization runs through the provider you configure — Anthropic, OpenAI, DeepSeek, Google, or a custom endpoint — with your own API key. For long documents, pick a model with a large context window so the whole text fits in one pass. For short threads, a smaller, cheaper model is plenty. Because you bring your own key, you pay the provider's rate directly and switch models whenever you like.

Clean first for messy sources

Text copied from PDFs often has broken line breaks and artifacts that confuse a summarizer. Run the Clean transform first to normalize it, then Summarize. Two shortcuts, a clean summary.

Keep summaries you'll reuse

Summarizing the same recurring document — a weekly report, a standard contract — produces output you might want again. Pin the summary so it survives past the rolling 150-clip limit (pinned clips are unlimited), or save a standard format as a snippet.

What leaves your Mac

ClipHistory has no cloud and no account. Your history and snippets stay on disk. The only thing sent out is the text you choose to summarize, delivered directly to your AI provider under your own key. You control which clips get sent.

A paste stack for batch summarizing

When you have several things to summarize in a row — a stack of articles, a folder of notes — the paste stack helps. Copy several items one after another; ClipHistory queues them so you can paste through them in order. Summarize each, paste each into your doc, and move to the next without losing your place. It turns a pile of sources into an ordered worklist.

Common ways people use this

A few patterns that come up again and again:

Triage email threads. A 30-message thread lands in your inbox. Copy it, Summarize, and decide in seconds whether you need to read the whole thing or just reply.
Pre-read for meetings. Copy the agenda doc or the last meeting's notes, summarize, and walk in oriented.
Research skimming. Copy each article's body, summarize, and keep only the ones worth a deep read.
Catch up on long chats. Copy a long Slack or group-chat export and get the gist instead of scrolling.

In every case the win is the same: you decide what deserves your full attention before spending it.

Tune the summary length to the model

Some models give you a tight three-bullet summary; others are more verbose. If the output is longer than you want, run a second pass — summarize the summary — or switch to a different model. Because you bring your own key across Anthropic, OpenAI, DeepSeek, Google, or a custom endpoint, you can find the one whose default style matches how you like to read.

Expectations

AI summaries are great for getting the main points fast. For anything where a missed detail is costly — legal terms, financial figures — read the source before acting. Use the summary to triage and orient, not as the final word.

Summary

Copy, Cmd+Shift+V, Summarize, paste. Long text becomes a usable summary in one shortcut, with the model and provider you choose, and your text staying local except for the single transform request.

Ready to put AI to work on your clipboard? Get ClipHistory for macOS — $19.99 (one-time payment, 12-month license, no auto-renewal). Signed and notarized by Apple, runs on Apple Silicon and Intel, macOS 12+.