Engineering English
Input Validation
Software Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: Input validation is the process of verifying that user-supplied data meets expected format, type, and range constraints before processing. It is a fundamental secure coding practice to prevent injection attacks and data corruption.
Example in context
“Always perform input validation on the server side to reject malformed data before it reaches the database.”
“Veritabanına ulaşmadan önce hatalı biçimlendirilmiş verileri reddetmek için daima sunucu tarafında girdi doğrulaması yapın.”
Where engineers use it
Input validation is applied in web forms, API endpoints, and database interfaces. Engineers write whitelist-based validation functions to check for SQL injection, cross-site scripting, and buffer overflow vulnerabilities.
Synonyms: input sanitization, input checking, data validation
Antonyms: trusted input assumption
Practice: can you use “Input Validation” at work?
Your team is reviewing code for a public-facing web app. A developer forgot to validate a search field. How would you explain the risk and propose a fix using input validation techniques?
Show a model answer
“Please add input validation to the user registration endpoint.”
“Input Validation” in 21 languages
| English | Input Validation |
|---|---|
| Turkish | girdi doğrulama |
| French | validation des entrées |
| German | Eingabevalidierung |
| Spanish | validación de entrada |
| Chinese | 输入验证 |
| Arabic | التحقق من صحة المدخلات |
| Portuguese | validação de entrada |
| Russian | проверка входных данных |
| Japanese | 入力検証 |
| Italian | convalida dell'input |
| Vietnamese | xác thực đầu vào |
| Hindi | इनपुट सत्यापन |
| Thai | การตรวจสอบความถูกต้องของอินพุต |
| Indonesian | validasi masukan |
| Korean | 입력 유효성 검사 |
| Bengali | ইনপুট বৈধকরণ |
| Dutch | invoervalidatie |
| Swedish | indatavalidering |
| Finnish | syötteen validointi |
| Ukrainian | перевірка введених даних |
Frequently asked questions
What does Input Validation mean in engineering?
Input validation is the process of verifying that user-supplied data meets expected format, type, and range constraints before processing. It is a fundamental secure coding practice to prevent injection attacks and data corruption. In Software Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Input Validation?
Input Validation is pronounced /ˈɪnpʊt ˌvælɪˈdeɪʃən/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Input Validation used in a sentence?
Example from an engineering context: “Always perform input validation on the server side to reject malformed data before it reaches the database.”
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