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Free Online String Length Calculator

Measure Unicode code points, UTF-16 units and UTF-8 bytes.

Your input stays on this device. Processing is bounded; regex runs in a worker with a two-second timeout.

Result



How to use String Length Calculator
Measure Unicode code points, UTF-16 units and UTF-8 bytes.
  1. Set Text.
  2. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Measure Unicode code points, UTF-16 units and UTF-8 bytes. The example below demonstrates Text.
Example input:
{
  "text": "A😀"
}
Expected result (relevant fields):
{
  "codePoints": 2,
  "utf16Units": 3,
  "utf8Bytes": 5
}
Features & result limitations
Measure Unicode code points, UTF-16 units and UTF-8 bytes.
Frequently asked questions
What inputs does String Length Calculator accept?
Text
How should I interpret the String Length Calculator result?
Measure Unicode code points, UTF-16 units and UTF-8 bytes.
Where does String Length Calculator process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.