Why this tool is useful
Use this extractor to clean repeated generated copy, merged notes or duplicated requirements while preserving the first editorial form.
Text & List Tools · runs locally
Unique Sentence Extractor
Keep the first occurrence of each complete sentence and remove later duplicates under a selectable case rule.
Ready. Your working data stays in this browser.
How it works
Each sentence receives a normalized comparison key, the first unseen key is retained and later matches are removed before readable rejoining.
Practical example
Ignore-case mode converts Same. Other! same. into Same. Other!, preserving the capitalization of the first instance.
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.