Privacy Filter
Strip private details out of text and spreadsheets before you send them to an AI tool.
- Paste text or open a spreadsheet
- Check what gets taken out
- Copy or download the clean version
Runs in your browser. Nothing you load here is uploaded or stored. Your word list, number formats and Pro key are the only things saved, in this browser. The page sends nothing anywhere, except your Pro key to check it.
Paste your text
An email draft, a message, a form answer — anything you were about to send to an AI tool.
"Always redact" word list
Check the result
This catches patterns, not context. Read the result before you send it.
Paste some text and the kinds of details found in it show up here — phone numbers, addresses, names and more. Switch any kind off to keep it.
Type one number the way it looks in your text. Each digit stands for any digit and each letter for any letter; dashes, dots and spaces have to match, so add both 8011234567 and 801-123-4567 if your text mixes them. Saved only in this browser.
Every word is clickable. Click a word to take it out; click it again to put it back. Shift-click does every matching word at once. Arrow keys and Enter work too. Only the words you keep end up in the copy.
Original click a word to take it out or put it back
Rewritten this is what you copy
- Your employer, job title, or where you work day to day.
- Places that locate you: your gym, your kid's school, the café you mention by name.
- Health details — conditions, medications, appointments.
- Money details — salary, debts, account balances.
- Other people's details. Their privacy isn't yours to trade.
Open your spreadsheet
A contact list, a donor list, a customer export. It's read on this device and never uploaded.
No file loaded yet.
Choose what happens to each column
The guesses come from each column's name and a sample of its values. Check every one: the tool can't know everything that's private.
| Column | Looks like | Example | What to do |
|---|
Open a file to see its columns.
"Replace" gives every different value its own placeholder, like [Phone 3], and the same value always gets the same one, so you can still sort, group and count. "Scan" is for notes and comments: it finds phone numbers, emails, names and the rest inside the text, using your number formats and word list from text mode too.
Preview: the first rows after cleaning
Load a file to see a preview.
Clean the whole file and download it
With the same passphrase, the same person or number gets the same placeholder, like [Name K7Q2M9XA3D], in every file you clean, on any computer. The passphrase isn't saved or sent anywhere. Forget it and you can't match new files to old ones.
Free for files up to 5,000 rows or 2 MB. Bigger files need Pro.
What changed
The key file turns placeholders back into real values later (“Put real values back”, above). Keep it as private as the original file.
What should get its real values back?
Paste the AI's answer, or open a file you cleaned here. Placeholders like [Name 3] are swapped back to what they stood for.
Or open a file instead:
Load the key
The key file you downloaded when you cleaned it. Several key files at once is fine.
No key loaded yet.
One thing to know: values that differ only in how they're written, like 801-555-0100 and 8015550100, shared one placeholder, so they come back in whichever form appeared first.
Put the real values back
With real values
Sharing less with AI tools is step one of using them well. This filter does the mechanical part — the patterns a machine can catch. The judgment part is yours: the free guide's Keep Your Judgment section covers when not to paste something at all, and the guides page has the rest of the series.
Limits
- This catches patterns, not context — read the result before you send it.
- Possible names are a guess. Confirm or dismiss each one yourself.
- Handles up to 2,000,000 characters of pasted text, or spreadsheets up to 500,000 rows or 100 MB.
- [object Object]
- It cannot spot what only you know is sensitive — see "Still check for yourself" above.
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- Schedule to CalendarTurn any pasted list into calendar events with reminders. The private columns stay behind.
- Review QR CardA review card customers actually scan.
- CSV MergerMany CSVs in, one clean CSV out.
- CSV CompareWhat actually changed between these two files?
- Excel MergerMany workbooks in, one sheet out.
- SDR Prompt BuilderA careful prompt, built the way the guide teaches.