Phone number formatterFormatters

Phone number formatter. One format for every number.

Paste phone numbers written any way, pick the default country and get E.164, international and national formats with wrong lengths flagged. It checks length and prefix rules for 37 countries, not whether a number is in service.

Cost to you

Free

Runs in your browser. No signup, no API call, no limit per hour.

browser
runs in
none
API calls
none
account

Use it now

Use the Phone number formatter here

It runs in your browser. Nothing you type is sent anywhere, there is no signup and no limit.

Loading the tool.

Run it from your agent

Copy one prompt, give it to your agent.

Fill in the placeholder, paste it, and the agent runs the same job with current data on your looot account and shows the cost.

  • You give it: phone numbers, one per line, and a default country.
  • Billed per call, nothing while your agent is idle.
  • The agent shows the price before it calls.
Prompt: Phone number formatter
Use looot to clean these phone numbers: [paste numbers, one per line]. The default country is [country]. 1. Set up https://looot.ai/skill.md. 2. Put every number in E.164 format and flag the ones with a wrong length. 3. Search the catalog for a phone validation endpoint, check its price, and validate the flagged ones. 4. Return a table of input, E.164, country and verdict, and the total cost.

Give this to your agent
Setup command
set up looot for Phone number formatter - https://looot.ai/free-tools/phone-number-formatter/skill.md

What comes back

What your agent gets from phone number formatter

Field names as the providers return them. The exact set varies by endpoint, and your agent reads it from the catalog.

  • E.164 format, such as +14155552671
  • international format
  • national format
  • the country of each number
  • the reason a number is flagged

Providers

Who can do this job today

Your agent picks the endpoint. These providers offer one right now, with the live price of their cheapest.

Use it for

What people do with phone number formatter

  • Prepare a CRM import

    Put every number in E.164 so the CRM and the dialer read them the same way.

  • Catch typos

    See which numbers have too few or too many digits before you call or text.

  • Ready for SMS tools

    Most SMS and calling APIs ask for E.164. Copy the column and paste it.

  • Check one number deeper

    Run a flagged number through the phone carrier lookup for line type and carrier.

Set up once

Three steps. Your agent does the rest.

Keep going

More free tools

FAQ

Questions about phone number formatter

The international standard way to write a phone number: a plus sign, the country code and the number with no spaces or trunk 0, such as +14155552671 or +442079460000.

Paste them in the box, one per line, and pick the country used for numbers without a + sign. Every line gets E.164, international and national formats. Download the result as CSV.

No. It checks the length and the prefix rules of the country. A number can have the right shape and still not be in service. Use the phone carrier lookup for a live check.

37 countries, including the US, Canada, the UK, most of Western Europe, India, Brazil, Mexico, Japan and Australia. A number from another country is flagged as an unknown country code.

The 0 in brackets is the trunk prefix used inside the UK. The formatter drops it, so the E.164 form is +442079460000.

Yes. It runs in your browser, needs no account and has no limit. Nothing you paste is sent anywhere.

Each country uses the grouping most common for its numbers. Some area codes group differently, so check the national form before you print it.
For agents
tool
Phone number formatter
category
Formatters
input
Phone numbers, one per line, and a default country
output
E.164 format, such as +14155552671, international format, national format, the country of each number, the reason a number is flagged
endpoint
tomba: tomba-phone-validator
price
per call, read live from the catalog on the web page
web tool
runs in the visitor's browser, no API call, free and unlimited
schedule
on demand
setup
https://looot.ai/free-tools/phone-number-formatter/skill.md
llms.txt
https://looot.ai/llms.txt
updated
2026-10-14
markdown /free-tools/phone-number-formatter.md

Run phone number formatter from your own agent.

Start your workspace, top up, and paste the prompt into the agent you already use. It runs the job with live data and shows the cost first.

Start your workspace See all free tools