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Identifier, Config, and Input Validation Tools

Compare validators for email, phone, IP, dates, cron, barcodes, payment details, env files, and other real-world inputs in one hub.

Overview

What this hub helps you accomplish

This hub focuses on practical validation work across forms, configs, payment details, logistics codes, and operational inputs. It brings together the validators people often need when checking whether user input or system data is safe to accept.

Tools

Tools inside this hub

Samples

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Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Overview

This hub focuses on practical validation work across forms, configs, payment details, logistics codes, and operational inputs. It brings together the validators people often need when checking whether user input or system data is safe to accept.

When to use

Validation work is usually about real inputs, so it helps to compare identifiers, schedules, config files, and customer-facing fields in one place.
It lets users move from one-off checks like email or IP validation to broader operational checks like env files, tracking numbers, and banking codes.
It gives a clearer starting point for signup flows, admin panels, API input checks, and internal tooling where bad input causes downstream failures.

How it works

1input-validation
2identifier-validation

3

config-validation

Use cases

input validator
email validator
phone validator
ip validator
env file validator
tracking number validator
barcode validator
form validation tools

FAQ

What can I do in this hub?

You can validate emails, phone numbers, IP addresses, dates, cron expressions, payment and banking identifiers, barcode numbers, and environment file content.

Who is this hub for?

It is useful for frontend and backend developers, QA teams, operations teams, and anyone building forms, APIs, or internal tools that accept structured input.

How should I start?

Start with the field type that fails most often in your workflow, then expand to related validators so the whole input path is checked consistently.

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Validation

Credit Card Validator

Validate credit card numbers and identify card type (Visa, MasterCard, UnionPay, etc.)

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Email Validator

Validate email addresses and check deliverability

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.env File Validator

Validate .env files for syntax errors and common issues

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Global Phone Validator

Validate phone numbers from multiple countries including China, US, and more with detailed formatting and carrier info

Validation

IP Address Validator

Validate IPv4 and IPv6 addresses with CIDR notation support

Validation

Date & Time Validator

Validate date and time formats including ISO8601, custom formats, leap year, and month/day validation

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Strong Password Validator

Validate password strength against common security requirements (uppercase, lowercase, numbers, special chars, length)

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Tracking Number Validator

Identify and validate tracking numbers from FedEx, UPS, DHL, USPS, SF Express (顺丰) and other major carriers

Validation

UPC/EAN Barcode Validator

Validate GTIN-12 (UPC), GTIN-13 (EAN), GTIN-8, and GTIN-14 product barcodes with check digit verification

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IBAN & SWIFT Validator

Validate International Bank Account Number (IBAN) and SWIFT/BIC codes with checksum verification

Validation

Cron Expression Validator

Validate Linux Crontab定时任务表达式（分时日月周）syntax

Validation

Color Code Validator

Validate Hex (#FFF, #RRGGBB), RGB/RGBA, HSL/HSLA color code syntax

Credit Card Samples

Valid credit card number samples for various networks (Visa, MasterCard, Amex, etc.) for testing purposes

Cron Expression Samples

Collection of cron expressions for various scheduling patterns (every minute, hourly, daily, weekly, monthly, etc.)

Date & Time Samples

Collection of date and time strings in various formats for validation testing

Environment Variables (.env) Samples

Environment variables configuration examples for different application types and environments

Global Phone Number Samples

Collection of phone numbers from various countries for validation testing

IBAN & SWIFT Code Samples

Collection of International Bank Account Numbers (IBAN) and SWIFT/BIC codes for validation testing

IP Address Samples

Collection of IPv4 and IPv6 addresses in various formats for validation testing

Strong Password Samples

Collection of passwords with varying strength levels for testing password validation

Tracking Number Samples

Collection of tracking numbers from major global carriers for validation testing

UPC/EAN Barcode Samples

Collection of GTIN-12 (UPC), GTIN-13 (EAN), GTIN-8, and GTIN-14 product barcodes for validation testing

Color Code Samples

Collection of color codes in various formats (Hex, RGB, HSL, named colors) for validation testing

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Identifier, Config, and Input Validation Tools | Elysia Tools