Text Case Converter
Convert pasted text between uppercase, lowercase, sentence case, title case, and developer-friendly formats. Use Smart Title Case for headings in papers, reports, and documentation.
🔒 Your text is processed locally in your browser and never uploaded. We do not upload or store your text.
Smart Title Case in action
Capitalize after hyphens: off
the effect of finite-element modeling in the design of steel bridges and aashto lrfd reports → The Effect of Finite-element Modeling in the Design of Steel Bridges and AASHTO LRFD Reports
Capitalize after hyphens: on
the effect of finite-element modeling in the design of steel bridges and aashto lrfd reports → The Effect of Finite-Element Modeling in the Design of Steel Bridges and AASHTO LRFD Reports
How it works
Each mode is a small, deterministic rule set — the same input always produces the same output. UPPERCASE, lowercase, Sentence case, and Title Case work the way you'd expect. The developer formats (camelCase, PascalCase, kebab-case, snake_case) split your text into words — handling existing camelCase, hyphens, underscores, and punctuation — and rejoin them in the target style.
Smart Title Case goes further: it keeps short connector words (a, an, the, and, of, in, with, and similar) lowercase in the middle of a title, always capitalizes the first and last word, capitalizes the word after a colon, question mark, exclamation mark, or em dash, and renders known acronyms — PDF, OCR, API, HTML, CSS, FEM, AASHTO, LRFD, and more — in uppercase regardless of how you typed them.
Got messy line breaks or hyphen-split words from a PDF first? Run your text through the PDF Text Cleaner before converting the case.
Common questions
Does my text get uploaded anywhere?
No. We do not upload or store your text. Every conversion runs as JavaScript on your device; there is no server that receives your text, and nothing is kept after you close the tab.
What is Smart Title Case and how is it different from Title Case?
Title Case capitalizes every word. Smart Title Case is built for headings in academic papers, theses, engineering reports, and documentation: it keeps short connector words like "of", "the", "and", and "in" lowercase in the middle of a title, always capitalizes the first and last word, capitalizes the word after a colon, question mark, exclamation mark, or em dash, and preserves acronyms like PDF, OCR, AASHTO, and LRFD.
What does "Capitalize after hyphens" do?
It controls hyphenated compound words in Smart Title Case. Unchecked, only the first part is capitalized: "finite-element analysis" becomes "Finite-element Analysis". Checked, both parts are capitalized: "Finite-Element Analysis". Engineering and scientific style guides differ on this, so it's your choice.
Is any of this done with AI?
No. Every mode is a deterministic, rule-based text transformation. The same input always produces the same output, and no text is sent anywhere for processing.