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Validate phone numbers against international E.164 format, check country code validity (1-3 digits), verify national numbering plans, format numbers with proper spacing/hyphens/parentheses, detect invalid structures, and support 200+ countries with local format rules.
Note: AI can make mistakes, so please double-check it.
Include country code (e.g., +1 for US, +44 for UK)
Common questions about this tool
Paste your phone validator code into the formatter, and it automatically applies proper indentation, spacing, and organization. The tool improves code readability while maintaining functionality.
Yes, the phone validator beautifies code by adding consistent formatting, proper indentation, and organizing structure. This makes code easier to read, debug, and maintain without changing functionality.
No, formatting only changes whitespace and organization. It doesn't alter code logic, syntax, or behavior, so your phone validator code works exactly the same after formatting.
Yes, the formatter offers customization options including indentation style, line length, and formatting preferences to match your project's coding standards and team preferences.
Paste minified code into the formatter, and it automatically adds proper indentation and line breaks to make the code readable again. This is useful for debugging or reviewing compressed code.
Verified content & sources
This tool's content and its supporting explanations have been created and reviewed by subject-matter experts. Calculations and logic are based on established research sources.
Scope: interactive tool, explanatory content, and related articles.
ToolGrid — Product & Engineering
Leads product strategy, technical architecture, and implementation of the core platform that powers ToolGrid calculators.
ToolGrid — Research & Content
Conducts research, designs calculation methodologies, and produces explanatory content to ensure accurate, practical, and trustworthy tool outputs.
Based on 1 research source:
Learn what this tool does, when to use it, and how it fits into your workflow.
Phone Validator checks if phone numbers are valid and properly formatted. It tests number structure, country codes, and identifies number types. This helps ensure phone numbers work correctly for calls and messages.
When phone lists contain bad numbers, calls fail and messages bounce. This wastes time and money. Finding bad numbers by hand is slow and error-prone. The validator checks numbers quickly and accurately. It shows which numbers are safe to use.
This tool is for anyone who works with phone numbers. Marketers use it to clean contact lists. Developers use it to validate user input. Professionals use it to maintain data quality. You do not need technical skills to use it.
Phone numbers have a specific structure. They start with a country code that identifies the country. Then comes the national number that identifies the specific phone. Both parts must follow rules to be valid.
People use phone numbers everywhere. Websites collect phone numbers for accounts. Businesses store customer contacts. Services send SMS messages. Applications use phone numbers for verification. Valid numbers are essential for communication.
Checking phone numbers by hand is hard. You must know many rules. Format must follow E.164 international standards. Country codes must be correct. National numbers must match local rules. Some numbers may be possible but not assigned. One mistake wastes a call or message.
When phone numbers are invalid, calls fail and messages bounce. This wastes communication capacity. It costs money for phone services. It delays important communications. The validator finds problems before using numbers. This saves time and money. A related operation involves validating JSON syntax as part of a similar workflow.
Marketing teams use this tool to clean contact lists. They paste customer phone lists and verify all numbers. They remove invalid numbers before sending campaigns. This reduces failed calls and message bounces. This improves campaign performance.
Website developers use it to validate user input. They check phone numbers during registration. They prevent invalid numbers from entering databases. This improves data quality and reduces support issues.
Customer service teams use it to verify contact information. They check phone numbers before making important calls. They ensure numbers are correctly formatted. This prevents missed communications.
Sales teams use it to verify prospect phone numbers. They check numbers before outreach calls. They identify number types for better targeting. They avoid invalid numbers that waste time. This improves outreach efficiency.
Data analysts use it to audit phone databases. They verify existing phone lists for accuracy. They identify numbers that need updating. They remove invalid numbers from important lists. This maintains database quality over time.
IT administrators use it to validate configuration. They check phone numbers in system settings. They verify notification numbers are valid. This prevents configuration errors. For adjacent tasks, validating XML structure addresses a complementary step.
The validator uses the libphonenumber-js library for validation. This library is based on Google's libphonenumber. It follows international phone number standards. It supports over 200 countries and regions.
Input processing starts with trimming whitespace. The tool removes leading and trailing spaces. It limits input length to 50 characters maximum. This prevents browser performance issues.
Parsing attempts multiple strategies. First, it tries parsing with a default country hint. If that fails and the number starts with plus, it tries international parsing. This handles both local and international formats.
Validation checks use multiple criteria. The tool checks if the number is valid according to standards. It checks if the number is possible even if not confirmed. It checks country code validity. It checks national number format against local rules.
Status determination combines validation results. Valid status means the number passes all checks. Possible status means format is correct but number may not be assigned. Invalid status means format problems prevent validation.
Country detection extracts country code from the number. The tool identifies the country code prefix. It matches codes to country names in its database. It shows both country code and full country name. When working with related formats, validating YAML syntax can be a useful part of the process.
Type detection analyzes number characteristics. The tool checks number patterns against known types. It identifies mobile, landline, toll-free, and other types. Type detection helps understand number usage.
Format generation creates multiple display formats. E.164 format adds plus sign and country code. National format shows local display style. International format shows country code with spacing. Each format serves different purposes.
Fix suggestion analyzes invalid numbers. The tool extracts digits from input. It tries adding missing country codes. It tries correcting format issues. It suggests fixes when corrections are possible.
Bulk processing handles multiple numbers efficiently. The tool splits input by newlines. It trims each number individually. It limits processing to 500 numbers maximum. It processes all numbers in sequence.
Statistics calculation counts result types. It counts total numbers processed. It counts valid numbers separately. It counts invalid and possible numbers separately. These counts provide quick quality overview.
Always include country codes for best results. Numbers with country codes validate more accurately. Use plus sign before country code for international format. This ensures correct country detection. In some workflows, validating phone formats is a relevant follow-up operation.
Use bulk mode for list cleaning. Paste entire lists at once for efficiency. The tool processes up to 500 numbers per batch. Split larger lists into multiple batches if needed.
Review possible numbers carefully. Possible numbers have correct format but may not be assigned. They might work but are not confirmed. Decide if they fit your needs before using.
Avoid invalid numbers for important communications. These numbers have format problems. They will likely fail when used. Remove them from important contact lists.
Check number types when targeting. Mobile numbers work for SMS messages. Landline numbers work for voice calls. Toll-free numbers are good for customer service. Understanding types helps with routing.
Use suggested fixes when available. The tool suggests corrections for invalid numbers. Apply fixes to correct format issues. This improves number quality quickly.
Export results for record keeping. CSV files preserve validation data. They help track list quality over time. They support compliance and auditing needs. For related processing needs, validating HTML code handles a complementary task.
Filter results to focus on specific types. Show only valid numbers for clean lists. Show invalid numbers to see problems. This helps you work efficiently.
Verify numbers regularly for active lists. Phone numbers become invalid over time. Regular verification maintains list quality. It prevents communication failures.
The tool checks format and structure, not number assignment. It cannot verify that a number is actually assigned. It cannot check if someone answers calls. It only validates number format and country rules.
Country detection requires valid country codes. Numbers without country codes may not detect country correctly. Always include country codes for international numbers. This ensures accurate country identification.
Bulk validation is limited to 500 numbers per batch. Larger lists must be split into multiple batches. This prevents browser performance issues. It keeps validation fast and responsive.
Type detection may not work for all number types. Some specialized number types may not be detected. The tool focuses on common types like mobile and landline. Unusual types may show as unknown.
Format suggestions are best-effort corrections. The tool tries to fix common format issues. Complex problems may not have suggestions. Manual correction may be needed for some numbers.
Articles and guides to get more from this tool
In the digital age, a phone number is more than just a way to talk. It is a digital identity. We use it to log into banks, verify Uber accou…
Read full articleSummary: Validate phone numbers against international E.164 format, check country code validity (1-3 digits), verify national numbering plans, format numbers with proper spacing/hyphens/parentheses, detect invalid structures, and support 200+ countries with local format rules.