Why this tool is useful
Use grapheme segmentation to debug character counters, cursor movement, truncation and UI limits that must not split visible symbols in the middle.
Text & List Tools · runs locally
Unicode Grapheme Cluster Segmenter
Split text into user-perceived grapheme clusters and show the code points that form each visible character.
Ready. Your working data stays in this browser.
How it works
Intl.Segmenter follows the browser Unicode grapheme rules. Each cluster is indexed and expanded into its U+ code-point sequence for direct verification.
Practical example
The combining e accent, skin-tone developer emoji and Ukrainian flag each appear as one grapheme even though their underlying code-point counts differ.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.