How to change text case with the correct language rules
Choose uppercase, lowercase or word capitals, handle Turkish I and Spanish accents, and review names and abbreviations before copying.
Open the toolDecide which kind of case change you need
Uppercase turns letters into capitals; lowercase turns them into small letters. The tool’s Title Case option capitalises the beginning of each word after lowercasing the rest. It is a simple word-capitals operation, not a complete newspaper, academic or language-specific title style. Choose the result you need before processing a long document. A case converter also cannot recover the original spelling of names or abbreviations after their original capitalisation has been lost.
Select the text language and apply the operation
Open the case converter, choose the operation, and set Text language to the language of the text. This choice is separate from the website’s interface language. Paste a copy into Input and select Apply. Review the Result field, then use Copy if the output is suitable. Changing the input or settings clears the previous output, so apply the conversion again after an edit. Keep the original document separately until the converted version has been checked.
Check Turkish letters and accented characters
Language choice matters for letters whose case rules differ. For example, with Turkish selected, “istanbul ı” becomes “İSTANBUL I” in uppercase. A plain English conversion gives a different dotted-I result. With Spanish selected, “árbol ñ” becomes “ÁRBOL Ñ”; converting case does not mean removing accents. Try a short sample containing the names and letters that matter to your document before converting everything. Some mappings can also change the number of letters, so a case change does not promise an identical character count.
Review proper names, abbreviations and headings
Automatic word capitals can turn “NASA API” into “Nasa Api”. That demonstrates why a heading still needs an editorial check. Restore official abbreviations, product spellings, surnames and words that follow a particular publication’s style. The current tool offers uppercase, lowercase and word capitals; it has no separate sentence-case button. Punctuation and line breaks stay in the text, but grammatical corrections and decisions about which words should remain lowercase are still your responsibility.
Check the text after copying it
Paste the result into its final destination and inspect a short section before replacing the complete document. Check accented letters, apostrophes, names and line breaks in the receiving editor. If the text is near a length limit, count the converted result again rather than relying on the original count. Processing takes place in your browser and the tool does not need to send the input or output to a server for conversion. The website or app where you later paste it has its own data handling and formatting.
Sources
Updated:
Try it in the tool →