Convert text to uppercase, lowercase, title case, sentence case, or toggle case. The conversion runs locally in your browser.
Input
Select a mode, paste or type your text, and the converted output appears immediately. Conversion runs in the current page, and this tool does not submit the text to our server.
Converts every character to its capital form. Most useful for headings in all-caps style guides, acronym labels, button text, short emphasis phrases, and any context where you want high visual weight without bold formatting.
Converts every character to its lowercase form. Useful for normalizing data from multiple sources, cleaning inconsistent user input, preparing identifiers and slugs, and resetting text before applying a different case style.
Capitalizes the first letter of every word. Useful for article headings, book titles, product names, and navigation labels. Keep in mind that strict title case style guides (AP, Chicago, APA) have different rules for articles and prepositions — this converter applies the simple every-word rule.
Capitalizes only the first letter after a sentence-ending punctuation mark. Well suited for converting ALL CAPS text back to readable prose, fixing copy that was accidentally typed in caps lock, and preparing social media captions or body copy that should read naturally.
Inverts the case of every character: uppercase becomes lowercase and lowercase becomes uppercase. Mainly used for creative text styling and meme-style formatting, but also occasionally useful for testing how a system handles mixed-case input.
The Swap button moves the output back into the input field and re-applies the current mode. This is useful when you want to apply multiple conversions in sequence, for example converting to title case and then swapping to adjust specific words manually.
Case style is a readability decision as much as a style one. Uppercase text slows reading speed because all letters share the same height, removing the visual rhythm that lowercase letterforms create. This makes it appropriate for short bursts of emphasis but not for body text or long headings.
Title case signals formality and is expected in publication headings, legal document titles, and brand names. Sentence case is the default for conversational writing, social posts, and UI copy where you want the text to feel natural rather than formal. Most modern design systems recommend sentence case for button labels and interface elements for exactly this reason.
Toggle case serves a different purpose entirely: it is primarily aesthetic and signals informal, ironic, or humorous tone. Lowercase normalization is a technical operation frequently needed when merging data from multiple input sources or building URL slugs and identifiers where case sensitivity would cause mismatches.
Case correction is one of the most common small-scale text cleaning tasks. These are the situations where a dedicated converter is significantly faster than doing it manually.
If you accidentally typed a paragraph in caps lock, sentence case converts it back to readable prose instantly. This is faster than retyping and avoids the frustration of undoing individual characters in a word processor.
Data from spreadsheets, form submissions, and API responses often mixes uppercase and lowercase inconsistently. Converting to lowercase creates a clean baseline before further processing, deduplication, or comparison operations.
When pulling headings from multiple documents or sources into one place, title case conversion brings them to a consistent style in one step rather than editing each heading individually.
Lowercase conversion is a standard first step before turning a heading into a URL slug. After converting to lowercase you can replace spaces with hyphens to produce a clean, consistent URL path or identifier string.
Sentence case has become the standard for modern product interfaces. If you are writing UI copy in a different context and need to batch-convert headings, labels, and navigation items to match your design system's convention, this is the fastest way to do it.
Subject line conventions vary by sender. Some brands use title case, others use sentence case. This converter lets you quickly produce both versions of a subject line to test which one fits your brand voice and which your audience responds to better.
Title case capitalizes the first letter of every word regardless of the word's grammatical role. This converter applies the simple every-word rule, which is the most common use case. If you are writing for publication and need to follow a strict style guide such as AP, Chicago, or APA, be aware that those guides exempt short articles (a, an, the), coordinating conjunctions (and, but, or), and prepositions from capitalization unless they appear as the first or last word.
Sentence case capitalizes only the first letter of the first word in each sentence and proper nouns. It reads more naturally in running text and is the standard for most modern web content, app interfaces, and conversational copy. When you paste a block of text in sentence case mode, the converter finds each sentence boundary and applies capitalization at the start of each one.
A practical rule of thumb: use title case for standalone headings and document titles that are not part of a sentence. Use sentence case for everything else, including subheadings within a document, button labels, descriptions, and body text. When in doubt, sentence case is the safer default because it never over-capitalizes, which title case occasionally does with common words that should remain lowercase under stricter style rules.
Case conversion works best as a focused single-step operation rather than something you do repeatedly as you write. Draft your text in whatever form comes naturally. Then paste it here once, apply the conversion that matches your target style, and copy the result back into your document.
The Swap button makes a second pass easy: if you convert to title case and want to fine-tune specific words back to lowercase, swap the output into the input, edit those words manually, and the rest of the case is already correct. This avoids having to re-apply conversion to the entire block after making edits.
For large volumes of text where you only need to convert specific sections, paste just those sections rather than the full document. This keeps the operation targeted and avoids accidentally converting proper nouns or brand names that should stay in a specific form.
Macros stores reusable text blocks with placeholders. When you fill in a macro and insert it into the notepad, headings and labels may arrive in a mixed case from different sources. This converter normalizes them in one paste-and-copy step, giving your final document a consistent visual style without manual character-by-character corrections.
This combination is especially useful for teams or individuals who write reports, proposals, or outreach messages using a standard template structure. The template handles the content skeleton, and the case converter handles the final polish on headings and titles.
These answers explain title case, sentence case, uppercase, lowercase, pasted text, and when to use this tool during editing.
Use the notepad to format your full document, add headings, and export to file once the case is correct.