String Length Counter

Count characters, UTF-8 bytes, and words for any input string.

Input

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Character and byte length validation

Last updated: March 30, 2026

A string length counter helps verify character and byte limits before inserting data into APIs, databases, or constrained UI fields.

Byte-length checks are especially important with Unicode text where characters may consume multiple bytes.

Quick validation prevents truncation, rejected requests, and avoidable data-quality issues.

Frequently asked questions

Why count bytes and not just characters?

Databases and APIs often enforce byte limits, so multibyte characters can exceed constraints unexpectedly.

Is this useful for social media limits?

Yes. It helps validate character-constrained content before publishing.

Can this prevent truncation bugs?

Yes. Checking exact lengths before inserts or API calls helps avoid validation failures.