Uppercase converter
Convert letters to uppercase online, preserving punctuation and line breaks. Paste text, inspect the capitalized result, then copy or download it.
About Uppercase converter
The uppercase converter changes cased letters to capitals. It preserves punctuation, digits, spaces and line breaks, so a multiline list remains a multiline list.
Case conversion follows JavaScript’s Unicode casing rules rather than a language-specific editorial style guide. Proofread proper names, acronyms and words with language-dependent casing before publishing the result.
How to use Uppercase converter
- Paste or open your source text in Input.
- Keep Uppercase selected, or switch to another case mode if needed.
- Compare Input with the automatically updated Output.
- Use Copy or Download to keep the result; Reset restores the tool’s starting mode.
Features
- Offers seven prose and identifier case modes in the same interface.
- Keeps the original input visible beside the converted output.
- Applies Unicode casing for upper, lower, title and sentence styles.
- Code-case modes normalize accents and retain ASCII letters and digits as identifier words.
Common uses
- Preparing short labels or signs with a consistent capital style.
- Standardizing codes whose destination requires capitals.
- Comparing an all-capital headline with the original draft.
Tips
- Check proper names and acronyms manually. For code-case output, non-Latin scripts may be removed instead of transliterated.
Frequently asked questions
What does the selected mode produce?
The starting mode is illustrated by “UPPERCASE”. You can switch modes in the toolbar without re-entering the original text.
Does this follow AP, Chicago or another title style?
No. Title Case capitalizes word starts mechanically and does not maintain a style-guide list of small words, names or abbreviations. Sentence case also needs a final check of proper names.
Can case conversion change meaning or identifiers?
Yes. Converting a password, case-sensitive identifier or acronym can change its meaning or behavior. Use a copy and review the result before replacing an original value.
Is my text uploaded or saved?
The tool processes the text in this page, on your device. It does not send the input to a conversion service or save it to an account. Advertising and ordinary website requests are separate from this local text processing. Copy or download any result you want to keep before leaving the tool.
Is my input uploaded?
Tools run in your browser. Files, text and results are not uploaded to our servers and are cleared when you leave the tool.
Your privacy comes first
Tools run in your browser. Files, text and results are not uploaded to our servers and are cleared when you leave the tool.