Phone number SHA-256 hasher
Normalize phone numbers toward digits with country code, then SHA-256 them in your browser. Nothing is uploaded.
Paste numbers, then Hash list.
How to use the Phone number SHA-256 hasher
- Paste one number per line, with country code when you can (for example +15551234567).
- Click Hash list. Punctuation is stripped; a leading + is kept as E.164-style digits.
- Download hashes only. Upload that file where the ad platform asks for hashed phone.
Country codes
Meta and Google match better when numbers include a country code. If a row is 10 US digits with no country code, this page prefixes 1. Other short rows are hashed as digits only — add the code yourself for those.
Nothing is uploaded
Normalization and SHA-256 run in the tab. Typical lists up to 50,000 rows or 2 MB.
Phone number SHA-256 hasher FAQ
What format is the hash?
SHA-256 hex of the digit string (country code plus number, no spaces).
Should I include +?
A leading + is stripped before hashing; digits remain. Put the country code in the digits.