AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I clean and validate a list of phone numbers?

Paste your phone numbers into AnyTool's Phone Number Cleaner — set a default country for local numbers — and it validates, formats and type-detects every number in real time using Google's libphonenumber (240+ countries). It standardises to E.164, international, national, RFC3966 or digits, flags the country and line type (mobile / fixed line), removes duplicates, and can even pull numbers out of messy text. Export the clean list as CSV or copy it. Everything runs in your browser — nothing is uploaded.

  • Validates + formats across 240+ countries (libphonenumber)
  • E.164 / international / national / RFC3966 / digits
  • Detects country & line type · bulk · dedup · extract from text
  • 100% in your browser — no upload, no signup, no number limit

What is

E.164 phone format

E.164 is the international telephone numbering standard: a "+", the country calling code, then the national number, with no spaces or symbols (e.g. +14155552671). Cleaning a phone list usually means validating each number and normalising it to E.164 so it imports cleanly into a CRM, dialer or SMS platform.

File Tools

Related terms

E.164libphonenumberphone validationcountry codeline type

How to Clean Phone Numbers

Validate, format and de-duplicate phone numbers in your browser.

15 secWeb browser
  1. 1

    Paste numbers

    Paste one per line (or any text in extract mode) and pick a default country.

  2. 2

    Choose output

    Pick E.164 / international / national, and optionally remove duplicates or keep only valid.

  3. 3

    Copy or download

    Copy the cleaned list or download it as CSV — nothing is uploaded.

Result: A validated, normalised phone-number list

Frequently Asked Questions

With AnyTool, yes — the numbers are processed in your browser and never uploaded.

Parsing, validation and formatting all run client-side with libphonenumber-js, so your contact list never leaves your device — unlike upload-based or API tools.

Yes — it covers 240+ countries using Google's libphonenumber, with a default country for local numbers.

Set a default country so numbers without a "+" parse correctly; it then validates, detects the country and line type, and formats each number.

Yes — paste a whole list and it converts every valid number to E.164 (or international / national), with optional de-duplication.

There is no number limit; you can also extract numbers from messy text and download the cleaned list as CSV.

Detailed Explanation

Methodology

How the Phone Number Cleaner Works

AnyTool parses, validates and formats phone numbers in the browser with libphonenumber-js — the JavaScript port of Google's libphonenumber — using the "max" metadata set so it can also report the line type (mobile, fixed line, toll-free, VoIP, etc.). A default country is applied so local numbers without a "+" prefix resolve correctly; numbers can be supplied one per line or extracted from arbitrary free text via findPhoneNumbersInText. Each number is normalised to E.164, international, national, RFC3966 or digits-only, tagged with its country (named via the built-in Intl.DisplayNames) and validity, and the list can be de-duplicated by E.164. Results are virtualised for large lists, summarised by country and line type, and exported as CSV or copied. There is no number limit and nothing is uploaded.

  • Runs client-side — the contact list is never uploaded
  • libphonenumber-js ("max" metadata) across 240+ countries
  • Validates + detects country and line type (mobile/fixed/…)
  • E.164 / international / national / RFC3966 / digits output
  • Bulk, real-time, de-duplication, and extract-from-text
  • CSV / TXT export; no CDN, no backend, no number cap
Privacy & Security

Privacy and Limits

Phone lists are personal data. Upload-based cleaners and validation APIs send your contacts to a server and often cap free usage or require signup. AnyTool runs entirely in the browser, so the numbers never leave your device, there is no per-number cost or credit limit, and it works offline after first load.

Phone cleaning: AnyTool vs typical online tools
CapabilityAnyToolTypical online tools
EngineGoogle's libphonenumber (client-side)libphonenumber or regex (often server)
Number limitNoneOften capped (e.g. 100) or credits
Line typeYes (mobile / fixed / …)Sometimes
Extract from textYesRarely
Data handlingIn your browserOften uploaded

Capabilities reflect the live AnyTool tool; competitor behavior varies by service.