How to Shorten or Expand Text with AI

Half of editing is length. A message that’s too long buries the point; a one-line note is too thin to send. Adjusting length is the kind of task you do constantly, and it’s also the one where the copy-paste-into-chat loop is most tedious — because “make it shorter” is rarely one and done. You shorten, it’s still too long, you prompt again, it’s now too terse, you prompt again. Here’s how to control length precisely without that ping-pong.

Decide what kind of length change you actually want

“Shorter” and “longer” are blunt. The good versions are specific:

• Tighten — same content, fewer words; cut filler and redundancy. (Most “make it shorter” requests are really this.)
• Cut to a target — “get this under 50 words,” “fit it in a tweet,” “two sentences max.”
• Expand for completeness — turn bullet points or a stub into full prose, adding connective tissue but no new facts.
• Expand for depth — actually develop the idea with examples or detail (use carefully; this is where AI is most tempted to pad or invent).

The risk at both ends: shortening can drop a necessary caveat, and expanding can invent claims you never made. A good length edit preserves your facts and your point — it only changes the word count. A practical tip: when you shorten, give the AI the reason (“this is a Slack message, make it skimmable”) rather than just a word target — it cuts smarter when it knows the medium. And when you expand, name the gap you want filled (“add a one-line example after each point”), so it adds substance instead of padding. Vague length prompts are why so many AI edits feel either gutted or bloated; a specific one gets you a clean cut or a genuine expansion on the first try.

The generic method (any AI tool)

1. Select and copy the text.
2. Open ChatGPT, Claude, Gemini, or any AI chat.
3. Paste with a target, not a vibe:

   “Tighten this to about half the length without losing any key point. Keep my meaning and facts. Return only the edited text:” “Expand these bullet points into a short paragraph. Don’t add any facts that aren’t here:”

4. Re-prompt to dial it in if the first pass overshoots — “a bit shorter,” “one more sentence.”
5. Copy the result, switch back, replace, paste, re-format.

The re-prompting is the pain. Every nudge is another full round-trip through the browser.

The one-hotkey way with EditSnappy

EditSnappy replaces the re-prompting with length controls you nudge in place — think a slider for shorter/longer rather than typing the same instruction again:

1. Select the text in the app you’re in — your email, a doc, a Slack message, a landing page in your CMS.
2. Trigger the shorten/expand control with your hotkey.
3. The adjusted text streams in to replace your selection. Want it shorter still? Nudge the control again and it re-runs in place — no re-typing, no browser. A live diff shows what changed; Tab to accept, Esc to keep your original.

Because EditSnappy reads the surrounding text, an expanded paragraph matches the document’s tone instead of reading like filler bolted on. Your formatting survives, and the model’s preamble is stripped before anything lands.

Why “in place” beats the re-prompt loop

The whole annoyance of length editing is iteration — and iteration is exactly where the copy-paste loop punishes you, because each tiny adjustment costs a full trip out to a browser and back. Doing it inline turns five round-trips into five keystrokes, your eyes never leaving the sentence.

And it works in the apps where it counts. Slack, Notion, VS Code and JetBrains IDEs are where most inline AI tools silently fail — the OS accessibility API misfires in Electron, Chromium, and Java apps, so the hotkey does nothing. EditSnappy is built around that failure: native write first, then a clean inject or one-click “Insert” fallback so the text actually lands. Every change is shown before it commits, with your original one keypress away in local history. One hotkey, Mac and Windows.

Stop re-prompting “shorter… no, shorter” in a browser tab. Start a free trial — no credit card and dial length in place. The full task index has every other edit.