Case Converter
Convert text to uppercase, lowercase, title case, sentence case, alternate case, or inverse case instantly in your browser.
What is a case converter?
A case converter changes the capitalization of text without requiring you to retype it. You can use it to convert text to uppercase, lowercase, title case, sentence case, alternate case, or inverse case.
This can be useful when editing documents, formatting headings, preparing content for websites, or cleaning up text copied from another source. The conversion happens directly in your browser, so you can process your text without uploading it to a server.
How to use the case converter
- Type or paste your text into the input box.
- Choose the case format you want to use.
- Review the converted text in the result box.
- Click Copy to copy the result to your clipboard.
Available case formats
- UPPERCASE: Converts all letters to uppercase.
- lowercase: Converts all letters to lowercase.
- Title Case: Capitalizes the main words in a title while keeping common minor words lowercase when appropriate.
- Sentence case: Capitalizes the first letter of each sentence and converts the remaining letters to lowercase.
- aLtErNaTe: Alternates between lowercase and uppercase letters.
- iNVERSE: Changes uppercase letters to lowercase and lowercase letters to uppercase.
When to use different case formats
Uppercase is commonly used for emphasis, labels, abbreviations, and short headings. Lowercase can be useful for usernames, URLs, technical text, or situations where consistent lowercase formatting is required.
Title Case is commonly used for titles and headings, while sentence case is generally better suited to paragraphs and natural-sounding interface text. Alternate and inverse case are mainly useful for formatting experiments and informal text.
Can a case converter preserve proper nouns?
Case conversion works primarily by changing the capitalization of characters and does not understand the meaning of every word. Because of this, automatic sentence case or lowercase conversion may change the capitalization of proper nouns, brand names, or acronyms.
For important documents, review the converted text afterward and restore any names, brands, abbreviations, or other terms that require specific capitalization.
Does the case converter store my text?
No. The conversion is performed directly in your browser using JavaScript. Your text does not need to be uploaded to a server for the tool to work.
Related tools
If you work with text regularly, these DigitalMind Tools can help with other common writing tasks:
- Word Counter — count words, characters, and paragraphs.
- Character Counter — count characters with or without spaces.
- Lorem Ipsum Generator — generate placeholder text for layouts and designs.
Frequently Asked Questions (FAQ)
Yes. The Case Converter is free to use, with no account or subscription required.
Title Case capitalizes the main words in a title while generally keeping short connecting words such as articles, conjunctions, and prepositions lowercase when they are not the first or last word.
Sentence case uses a capital letter at the beginning of each sentence while keeping the rest of the sentence in lowercase. Proper nouns and other terms with specific capitalization may need to be corrected manually after conversion.
There is no fixed character limit built into the tool. Very large amounts of text may take longer to process depending on your device and browser.
No. The conversion is performed locally in your browser using JavaScript, so the tool does not need to send your text to a server.
Base64 Encoder & Decoder
Encode plain text to Base64 or decode Base64 strings back to plain text instantly with our free online Base64 Encoder & Decoder.
What is Base64 encoding and decoding?
Base64 is a widely used encoding method that converts binary data into a string of text characters. It is commonly used when data needs to be transmitted through systems that are designed to handle text.
Base64 can be useful for data included in email messages, JSON payloads, HTML, CSS, and data URLs. The encoding process uses a set of 64 characters, including uppercase letters, lowercase letters, numbers, and two additional symbols. Padding characters may be added at the end of the encoded string when necessary.
The DigitalMind Tools Base64 Encoder & Decoder lets you encode plain text into Base64 or decode a Base64 string back into readable text directly in your browser.
How to use the Base64 Encoder & Decoder
The tool works in two simple modes. Use Encode when you want to convert regular text into a Base64 string, or use Decode when you want to convert a Base64 string back into text.
- Select Encode or Decode.
- Enter or paste your text into the input field.
- Click Encode to Base64 or Decode from Base64.
- Review the result and click Copy result if you want to copy it to your clipboard.
The conversion happens instantly in your browser, so there is no need to create an account or upload your text to a server.
Common uses for Base64 encoding and decoding
Base64 is commonly used in web development and data transmission. Developers may use it to represent binary data as text, including images and other resources in data URLs.
It is also used in email systems and in some web protocols where binary data needs to be represented using text characters. Base64 is also associated with formats such as JSON Web Tokens, although JWTs use a URL-safe variant rather than standard Base64.
The official specification for standard Base64 is described in RFC 4648 .
Base64 encoding vs. encryption
Base64 encoding is not encryption. It does not protect information from being read and should not be used as a security method for sensitive data.
Anyone who has a Base64-encoded string can decode it when the underlying data uses standard Base64. If you need to protect confidential information, use an appropriate encryption method instead of Base64 encoding.
In simple terms, encoding changes how data is represented, while encryption is designed to protect data from unauthorized access.
Frequently Asked Questions (FAQ)
Base64 increases the size of encoded data by about 33% because every 3 bytes of input are represented by 4 Base64 characters. This is the trade-off for representing binary data using a text-based format.
This version of the tool is designed for text input and does not support direct file uploads. If you need to convert an image or another file into Base64, you would need a file-to-Base64 converter that can process binary files.
The = character is used as padding when the original data does not fit evenly into groups of 3 bytes. Depending on the input length, a Base64 string may end with one or two padding characters.
Base64 URL encoding is a URL-safe variation of Base64. It replaces the standard + and / characters with - and _, making the encoded value more suitable for URLs and filenames.
This tool uses standard Base64 rather than Base64 URL encoding.
No. The encoding and decoding operations are performed directly in your browser using JavaScript. The tool does not need to send your text to a server to perform the conversion.