Data Validation & Sanitization10 Verified APIs

Free Data Validation & Sanitization APIs

Email verification, phone formatting, syntax checks, and data cleaning

Interactive In-Browser Tools for this Category:Test endpoints and format data with zero setup

International Phone Validator & E.164 Formatter ISO 13616 IBAN & BIC/SWIFT Validator ICANN RDAP / Modern WHOIS Domain Inspector

Data Validation & Sanitization API Comparison Overview

Top Endpoints

API Service	Auth Type	Rate Limit	Security	Direct Link
Lob.com	Free Key	Değişken	HTTPS • CORS	Docs
Smarty US Street	Free Key	Değişken	HTTPS • CORS	Docs
Smarty US Autocomplete	Free Key	Değişken	HTTPS • CORS	Docs
PurgoMalum	No Key	Sınırsız	HTTPS • CORS	Docs
Postman Echo	No Key	Sınırsız	HTTPS • CORS	Docs
VATlayer	Free Key	100 istek/ay	HTTPS • CORS	Docs

Available Endpoints (11)

GET

Lob.com

Verify, standardize, and format US postal mailing addresses via official USPS data

Data Validation & SanitizationAPI KeyCORSVariable

GET

Smarty US Street

Verify, standardize, and format US postal mailing addresses via official USPS data

Data Validation & SanitizationAPI KeyCORSVariable

GET

Smarty US Autocomplete

Instant autocomplete address search for US street addresses and suites

Data Validation & SanitizationAPI KeyCORSVariable

GET

PurgoMalum

Filter profanity, swear words, and inappropriate language from user inputs

Data Validation & SanitizationNo AuthCORSUnlimited

POST

Postman Echo

Endpoint testing utility for verifying various HTTP verbs and headers

Data Validation & SanitizationNo AuthCORSUnlimited

GET

VATlayer

Real-time global VAT number validation and European Union company verification

Data Validation & SanitizationAPI KeyCORS100 req/month

GET

ICANN RDAP Domain Inspector

Official ICANN RDAP (RFC 9082) domain registry query service returning authoritative registration, expiration, and DNSSEC metadata.

Data Validation & SanitizationNo AuthCORSUnlimited (Official Registry)

GET

RealIP Lookup

Client IP address, ASN, geolocation, and reverse DNS (PTR) verification and lookup REST API.

Data Validation & SanitizationNo AuthCORSFree (No auth required)

GET

Profanity Checker API

Check text for profanity (filter out bad words)

Data Validation & SanitizationNo AuthCORSFree (No auth required)

GET

VAT Validation API

Allows VAT number validation, geolocation, and exchange rates for VAT compliance.

Data Validation & SanitizationNo AuthCORSFree (No auth required)

GET

CPFHub.io

REST API for Brazilian CPF data verification, name matching, and birth date validation with batch processing and MCP support.

Data Validation & SanitizationAPI KeyCORS50 credits/month (No Card)

About Free Data Validation & Sanitization APIs

This directory curates 10 verified public APIs in the Data Validation & Sanitization domain. Developers can build dashboards, mobile applications, automation bots, and microservices with these ready-to-integrate endpoints without upfront billing.

Do I need an API key?

Several APIs listed here operate as Zero-Auth services where you can execute queries directly. Others provide free developer tiers with an instant key upon registration.

Does FreeAPI support CORS?

Yes, all endpoints can be called through FreeAPI Smart Edge Gateway to bypass browser CORS headers and inspect live responses.