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Uppercase & Lowercase Converter
Convert English letter case into the format you need.
How to use
These are example steps; replace the values for your task.
- Paste the text and select sentence case.
- Check sentence openings and proper names before copying.
Converted text
0 characters
About this tool
Standardize letter case in email subjects, product names, English headings, code strings, and more. Non-Latin text, numbers, and symbols remain unchanged. Your text is processed only in your browser and is never sent to a server.
Continue this task
- Text Line Decorator — After changing letter case, prepare a decorated string for copying.
Try a use case and check the result
Change letter case for prose or a required output format.
Try this example replaces the input and settings. Restore previous input returns to the state before the latest example. Normal draft-saving rules apply.
After trying multiple examples, repeat Restore previous input to return to your original input. History is kept only in this page; restore any input you need before closing it.
Use sentence case
Input and settings
HELLO WORLD. NEXT STEP!
Case: Sentence case
Expected result
Hello world. Next step!
How to read the result
Letters after supported sentence punctuation are capitalized. Review proper names and acronyms such as NASA separately.
Scope and pitfalls
This is not grammatical parsing. A line break alone does not begin a new sentence.
Continue with the next task
Frequently asked questions
Does this change non-English text?
Only the uppercase and lowercase forms of Latin letters are changed. Other scripts, numbers, and symbols remain unchanged.
Is my text sent to a server?
No. Conversion and draft storage take place only in your current browser.
Does Title Case capitalize every word?
Yes. This tool capitalizes the first letter of English words separated by spaces, hyphens, and similar boundaries. It does not apply editorial exceptions for small words.
Related tools
Review names and abbreviations after converting
Case conversion cannot determine the intended spelling of names, product terms, URLs, or abbreviations. Review the result before copying it.
Share this tool
Share only the tool name and public URL. Your input and results are not included.
Inputs and storage
Keep a separate copy before clearing or resetting. This browser autosaves entered text. Data is not restored when read 30 days or more after its last save. Clearing site data or storage restrictions may remove it sooner.
Favorites and language preferences are stored separately and may be lost when site data is cleared. Tool resets and site-data deletion do not delete files already downloaded to your device.