An AI App to Improve Any Copied Text on Mac
An AI App to Improve Any Copied Text on Mac
The text you copy is rarely the text you want to send. A draft reply needs tightening. A pasted note needs cleaning. A quote needs shortening. A message needs translating. An AI app that improves copied text handles all of that at the place where text already passes through: the clipboard.
This article explains what "improving copied text" means in practice on a Mac, the four transforms involved, and how to set it up with your own AI provider.
What "improve copied text" means
Improving copied text isn't one operation — it's a set of them, each suited to a different problem. ClipHistory groups them as four AI transforms:
- Rewrite — adjust tone, clarity, or length while keeping the meaning.
- Summarize — condense long text into its key points.
- Translate — convert text into another language.
- Clean — strip stray formatting, fix spacing, and reflow broken lines.
Each acts on the current clip in your history, so the input is whatever you last copied.
The core workflow
Whatever you're improving, the loop is the same:
- Copy text with
Cmd+C. - Open ClipHistory with
Cmd+Shift+V. - Pick the clip and run a transform.
- Paste the improved version.
Because it operates on the clipboard, this works in every app — Mail, Messages, Notes, your editor, a web form — with no per-app plugin.
Your own API key, five providers
ClipHistory doesn't include a model. You connect your own API key to one of five providers: Anthropic, OpenAI, DeepSeek, Google, or a custom endpoint. You add the key once in settings. From then on, transforms run through that model.
This design keeps three things in your hands:
- Cost — the provider bills you for usage; ClipHistory is a one-time $19.99 purchase.
- Quality — choose the model that fits the job.
- Privacy — transforms call only your provider; there's no ClipHistory server in the path.
Everything stays local
ClipHistory has no cloud and no account. Your clip history, snippets, and boards are stored on your Mac. The only text that leaves is the clip you transform, sent directly to your provider. No sync, no telemetry, no sign-in. If you never run a transform, nothing leaves at all.
Combining transforms
The real power is stacking. Since each transform updates the current clip, you can run them in sequence:
- Clean then rewrite — normalize a messy paste, then polish the tone.
- Rewrite then translate — improve the original, then convert it.
- Clean then summarize — tidy a long article, then condense it.
Intermediate versions stay in your history, so you can step back if a transform overshot.
Pinning, snippets, and boards
ClipHistory keeps 150 unpinned clips and unlimited pinned clips. Pin the improved texts you reuse — a polished bio, a standard reply, a translated description. Organize the keepers into snippets and boards, and use the paste stack to queue several clips and paste them in order. Improving text once and reusing it is often better than improving it again.
Setup
- Install ClipHistory — universal binary, macOS 12 or later, Apple Silicon and Intel.
- Add an API key for one provider in settings.
- Confirm the global shortcut
Cmd+Shift+V. - Copy a draft and run a transform to confirm.
That's it. From here, improving text is part of your normal copy-paste rhythm.
When this is the right tool
A clipboard-level text improver fits the constant stream of small edits you make all day — tightening a reply, cleaning a paste, shortening a quote, translating a line. It removes the browser detour and the app switching those edits usually require. It is not a long-form document editor; for structured, lengthy writing, draft in a real editor and use transforms for targeted fixes.
A worked example
Say you've just pasted a customer's complaint copied from a support inbox. It arrives with quoted-reply markers and odd line breaks. Run clean to strip the markers and reflow it. Now you understand the issue, but you need a calm, professional reply — so you draft a quick response, copy it, and run rewrite to smooth the tone. The customer writes in another language, so you run translate on the polished reply. Three transforms, all on the clipboard, no app switching, and each version preserved in your history if you need to revise. The final reply gets pinned because you'll adapt it for similar tickets later.
That sequence — clean, rewrite, translate — is representative of how the transforms earn their place: not as a single magic button, but as small composable steps you reach for as the situation demands.
Why it's safe to trust with real work
ClipHistory is signed and notarized by Apple, so Gatekeeper launches it cleanly. With no account and no telemetry, there's no off-machine store of your text. You bring your own key, you pick the model, and you decide which clips ever touch it. The only data that leaves your Mac is the specific clip you choose to transform, sent to the provider you configured — the same call you'd make yourself with that key.
Wrap-up
Improving copied text on a Mac comes down to four transforms — rewrite, summarize, translate, clean — applied at the clipboard with Cmd+Shift+V. ClipHistory uses your own provider key, keeps your history local, runs as a signed universal binary on macOS 12+, and folds the whole thing into the copy-paste flow you already have.
Ready to put AI inside your clipboard? Get ClipHistory for macOS ($19.99) — a one-time payment, 12-month license, no auto-renewal. Signed and notarized by Apple, universal binary, everything stays on your Mac.