Phone Number
Converter Tool
Generate phone numbers and see them converted across all six formats instantly. Understand format conversion rules for 50+ countries.
What Is a Phone Number Converter?
A phone number converter transforms phone numbers between different format representations — converting National to E.164, International to Digits Only, or any other combination. This is essential when integrating systems that use different format conventions.
Our converter generates sample numbers and shows you the converted output across all six formats simultaneously. This helps developers understand conversion rules and verify that their own conversion logic produces correct results.
- ✓ See all six format conversions for any generated number
- ✓ Understand conversion rules between National ↔ E.164
- ✓ Test that your conversion logic matches expected output
- ✓ Support for 50+ countries with unique conversion patterns
Input
Generate or select format
Convert
Transform between formats
Verify
Compare conversion output
Phone Number Converter Features
Everything you need — built for speed, privacy, and flexibility.
Multi-Format Conversion
See every generated number converted into all six formats simultaneously — National, International, E.164, Digits, Dashed, Dotted.
Bidirectional Reference
Understand how to convert from any format to any other format by studying the parallel output of all six representations.
Country-Aware Conversion
Conversion rules change by country. See how the same conversion operation differs across 50+ international formats.
Conversion Rule Reference
Study the pattern transformations between formats to build accurate conversion functions in your codebase.
Batch Conversion Output
Generate up to 50 numbers and see them all in your target format, providing a batch conversion reference dataset.
Copy Converted Output
Copy the converted output directly — no need to run numbers through your own converter to get properly formatted results.
Instant Conversion
Switch between formats in real-time. Generated numbers are reformatted instantly when you change the output format.
Free Conversion Tool
No registration, no limits. Convert and compare phone number formats for any supported country, completely free.
How to Convert Phone Numbers
Follow these simple steps to get started.
Choose Source Country
Select the country whose phone numbers you're working with. Conversion rules depend on the country's specific formatting conventions.
Generate Sample Numbers
Create a batch of numbers in your initial format. These serve as the source data for conversion demonstration.
Switch Target Format
Change the output format to see the same numbers converted. Toggle between formats to study the conversion patterns.
Compare & Export
Compare the original and converted formats side by side. Export the converted output as JSON or CSV.
Format Conversion Examples
Compare formats, country codes, and digit lengths across major countries.
| Country | Code | Format | Example | Digits | |
|---|---|---|---|---|---|
| 🇺🇸 USA | +1 | E.164 ↔ National | +12025841793 ↔ (202) 584-1793 | 10 | |
| 🇬🇧 UK | +44 | E.164 ↔ National | +447392841567 ↔ 07392 841567 | 11 | |
| 🇨🇦 Canada | +1 | E.164 ↔ National | +16139284175 ↔ (613) 928-4175 | 10 | |
| 🇦🇺 Australia | +61 | E.164 ↔ National | +61439182574 ↔ 04 3918 2574 | 10 | |
| 🇮🇳 India | +91 | E.164 ↔ National | +917492831056 ↔ 74928 31056 | 10 | |
| 🇵🇰 Pakistan | +92 | E.164 ↔ National | +923284917352 ↔ 0328 4917352 | 11 | |
| 🇩🇪 Germany | +49 | E.164 ↔ National | +491612849371 ↔ 0161 2849371 | 11 | |
| 🇫🇷 France | +33 | E.164 ↔ National | +33718294357 ↔ 07 18 29 43 57 | 10 | |
| 🇧🇷 Brazil | +55 | E.164 ↔ National | +5521928471359 ↔ (21) 92847-1359 | 11 |
Who Needs Phone Format Conversion?
Built for professionals across development, testing, and design.
Data Migration Engineers
Convert phone numbers between formats when migrating data between systems that use different storage conventions.
Integration Developers
Transform phone formats when integrating systems — converting CRM national format to API E.164 format and vice versa.
ETL Pipeline Builders
Add format conversion steps to ETL pipelines that normalize phone data from diverse sources into a standard format.
Report Builders
Convert stored E.164 numbers to human-readable national format for inclusion in business reports and dashboards.
API Gateway Engineers
Transform phone formats at the API gateway layer to normalize inputs before they reach backend microservices.
Legacy System Teams
Convert phone formats when connecting modern APIs to legacy systems that store numbers in non-standard formats.
Common Use Cases
See how professionals use phone number converter every day.
Data Migration
Convert phone numbers from legacy national format to E.164 when migrating customer data to a modern platform.
API Format Translation
Transform phone formats at integration boundaries when connecting systems that expect different format conventions.
ETL Normalization
Standardize phone numbers from multiple data sources into a single canonical format during extract-transform-load processes.
Display Conversion
Convert stored E.164 numbers to user-friendly national format at the application display layer.
Import Preprocessing
Convert CSV phone columns from various formats to a unified format before importing into databases or CRM systems.
Cross-System Sync
Maintain format consistency when syncing phone records between systems that use different numbering conventions.
Conversion Logic Testing
Generate reference conversion pairs to verify that your own conversion code produces the expected output.
Format Conversion Facts
Converting formats just means removing spaces
Format conversion involves adding/removing country codes, translating trunk prefixes (0 in UK becomes +44), and restructuring digit groups.
E.164 to national conversion is always the same
Each country has unique rules: US drops +1, UK replaces +44 with 0, France replaces +33 with 0. Generic conversion doesn't work.
You only need to convert once during import
Conversion happens at multiple points: import, storage, display, export, and API communication. Each step may require a different format.
Country code is always the first 1-2 digits
Country codes range from 1 digit (+1 for US) to 3 digits (+880 for Bangladesh). Parsing requires a lookup table, not simple substring.
Important: Converted numbers are for reference and testing. They demonstrate format transformation rules but are not connected to real subscribers.
Key Takeaways
Phone number conversion is more than adding or removing spaces.
Each country has unique rules for translating between formats.
E.164 is the canonical format — convert to/from it as needed.
Country codes range from 1 to 3 digits, requiring lookup-based parsing.
Conversion happens at multiple application layers: storage, display, API.
Generate reference conversion pairs to validate your own conversion code.
Free, instant, and covers 50+ country conversion patterns.
Tips for Using Phone Number Converter
Practical advice for getting the most out of this tool. Click any card to flip it.
E.164 as Canonical
Click to reveal →Always convert to E.164 for storage. Then convert from E.164 to the appropriate display format at the presentation layer.
Trunk Prefix Handling
Click to reveal →Many countries use a trunk prefix (0) for domestic calls that gets replaced by the country code for international format. Handle this correctly.
Test Round-Trip Conversion
Click to reveal →Convert National → E.164 → National and verify you get the original. If not, your conversion logic has bugs.
Use Lookup Tables
Click to reveal →Country codes vary in length (1-3 digits). Don't parse them with substring — use a country code lookup table for accurate conversion.
Handle Country Detection
Click to reveal →When converting from E.164 to national, you must detect the country code first. Ambiguous cases (US/CA both +1) require additional context.
Edge Cases Matter
Click to reveal →Some countries have multiple valid formats, variable-length numbers, or recently changed rules. Always test conversion with current format data.
Frequently Asked Questions
Everything you need to know about phone number converter.
Conversion transforms numbers between representations — adding/removing country codes, translating trunk prefixes, and restructuring digit groups to match target format conventions.
Remove the trunk prefix (e.g., leading 0), prepend the country code with +. Example: UK 07911 123456 → +447911123456.
Strip the country code and + sign, add the trunk prefix if applicable, and apply the country's national spacing rules. Example: +447911123456 → 07911 123456.
Different systems store and display phone numbers in different formats. CRMs may use national format while APIs expect E.164. Conversion bridges these differences.
A trunk prefix (usually 0) is dialed before the area code for domestic calls in many countries. It's dropped when converting to international or E.164 format.
Yes. Once you know the country, you can convert between any pair of the six supported formats. The tool demonstrates all conversions side by side.
US and Canada share +1. Distinguish them by area code ranges, geographic context, or user-provided country information.
Yes. Generate numbers, note the output in all six formats, then verify your conversion code produces the same results.
Some countries have numbers of varying lengths. Your conversion logic should handle this by using the country's numbering plan rules rather than fixed-length assumptions.
Yes. Completely free, unlimited, and covers 50+ countries. No registration or account needed.