A blank page is a terrible place to start. The fastest writers almost never do. They start from a shelf of examples they have already collected: a subject line that made them open an email, a headline that stopped them scrolling, an opening paragraph that pulled them in. That shelf has a name. It is a swipe file, and it is one of the oldest working tools in advertising and copywriting.
The name sounds slightly dodgy, as if you are stealing. You are not. A swipe file is a study collection. You keep proven writing so you can take it apart, understand why it works, and build your own version when you face a similar task. The word “swipe” refers to borrowing the technique, not lifting the words.
Where the idea comes from
Swipe files predate the internet by decades. Mad-men-era copywriters kept physical folders of magazine ads, direct mail letters, and coupons that had pulled strong sales. When a new brief landed, they would flick through the folder for a format that fit, then write fresh copy on that proven skeleton. The thinking was simple: a headline that already made thousands of people respond tells you something a blank page never will.
The practice survived because it works for any persuasive writing, not just ads. Marketers, novelists, journalists, and people who just write a lot of emails all benefit from a reference library of lines that landed.
What actually goes in a swipe file
The short rule: save anything you wish you had written. The point is not to hoard, it is to collect examples specific enough to learn from. A good swipe file usually holds a mix of these.
- Headlines and subject lines. The hardest sentences to write, and the ones with the most proven patterns. Save the email subjects that made you open, and the headlines that made you click.
- Opening lines. First sentences from articles, ads, and stories that hooked you. Openings are where most writing fails, so a stack of strong ones is gold.
- Calls to action. The exact wording of buttons and sign-up prompts that felt easy to say yes to.
- Full ads and landing pages. Whole pieces worth studying for structure, not just a single line.
- Turns of phrase and analogies. A metaphor that made a dull idea click, a phrase you keep thinking about.
- Your own best work. The line you wrote that performed well. Future you will want it back.
Why it works
Three reasons, and they reinforce each other. First, it removes the blank page. Starting from a proven structure is far easier than inventing one, and the work usually comes out better because the bones are sound. Second, it trains your eye. When you save a headline and ask why it works, you are studying craft in small, concrete doses, which sticks far better than reading a book about writing. Third, it compounds. A swipe file you have tended for a year is a private textbook written entirely from examples you found persuasive, which is exactly the kind of writing you tend to produce.
It pairs naturally with the wider habit of capturing what you read. If you want the reading-and-remembering side of this, see how to remember what you read. A swipe file is the applied, write-it-yourself cousin of that habit.
How a swipe file fits with notes and a second brain
People often confuse three things: a swipe file, a commonplace book, and a second brain. They are related but not the same. A commonplace book is a broad collection of quotes and passages you want to remember and think about. A second brain is the whole system you use to store and connect everything you know. A swipe file is the narrow, practical slice aimed at one job: writing better, faster, by reusing proven persuasive copy.
You do not need a complicated setup to start. The foundations of good note-taking apply here too, and our guide on how to take better notes covers the habits that make any collection like this actually useful rather than a junk drawer.
How to build one, step by step
1. Pick one home for it
Do not scatter saves across five apps. Choose a single place you will actually open: a plain document, a notes app, or a quick online notepad for fast capture. If you want light formatting so headlines, source, and notes stay tidy, a markdown editor works well. The best tool is the one with the least friction between seeing something good and saving it.
2. Capture in the moment
The good stuff appears when you are reading email, browsing, or scrolling, not when you sit down to “build a swipe file.” So lower the bar to almost nothing. Copy the line, paste it in, move on. On Windows you can lean on a clipboard manager so a line you grabbed an hour ago is still there after a dozen other copies.
3. Add one line of context
A naked quote is half useless. Save where it came from and, ideally, one note on why it works: “curiosity gap,” “specific number,” “names the objection.” That tiny tag is what turns a pile of clippings into a tool you can search by technique.
4. Sort it loosely
Do not over-engineer the structure. A few buckets are plenty: headlines, openings, CTAs, emails, full pieces. You can always split later. The aim is to find the right example in seconds when a deadline is breathing on you.
5. Actually use it
The step everyone skips. Before your next draft, open the file and read the relevant section. Pick a pattern, then write your own version for your audience. Over time you will internalise the moves and reach for the file less, which is the whole point.
One honest warning
A swipe file is a study tool, not a shortcut around writing. The line between learning from a structure and copying someone else’s words is real. Borrow the technique, the angle, the rhythm. Then put it in your own language, for your own reader. A swipe file makes you a faster, sharper writer. It does not write for you, and it should not.