Text Converters
Capitalize first letters
Super simple online tool to automatically capitalize the first letter of every word in the text that you type or paste in.
Cooking Unit Converter
Free cooking unit converter. Convert between cups, tablespoons, teaspoons, grams, ounces, milliliters and more for recipes.
CSV to JSON Converter – Free Online Tool
Convert CSV data to JSON instantly in your browser. Supports custom delimiters, optional headers, and pretty-print output. Free, private — no data is sent to any server.
Currency Converter
Convert between 30+ world currencies using real exchange-rate data from the European Central Bank. Free, fast, and runs in your browser.
File Size Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and more. Supports both binary (KiB, MiB) and decimal (KB, MB) standards. Free, instant, browser-based file size converter.
ISBN-10 to ISBN-13 Converter
Convert between ISBN-10 and ISBN-13 instantly. Validates the check digit, shows the calculation steps, and supports batch conversion of multiple ISBNs at once. Free and no sign-up required.
JSON to YAML Converter
Instantly convert JSON to YAML or YAML to JSON in your browser. Paste your data, click convert, and copy the result. Free, private, no data sent to any server.
Markdown to HTML Converter
Convert Markdown to HTML instantly in your browser. Supports headings, bold, italic, links, images, lists, blockquotes, code blocks, tables, and horizontal rules. No upload required.
Morse Code Converter – Text to Morse Code and Back
Convert text to Morse code or decode Morse code back to plain text instantly. Supports all letters, numbers, and common punctuation. Free, browser-based Morse code translator with audio playback.
Number to Words Converter
Convert any number to words instantly. Spell out integers, decimals, negative numbers, and large numbers in full English text. Free online number to words converter.
Roman Numeral Converter
Convert any number from 1 to 3,999 to Roman numerals, or convert Roman numerals back to standard (Arabic) numbers. Includes a reference chart and full explanation. Free, instant, browser-based.
Temperature Converter
Instantly convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine. See all four scales at once with conversion formulas. Free, browser-based temperature converter.
Text to Binary
Convert from text to binary values with this quick, simple and free online tool.
Text to Hexadecimal
Quick and easy tool to convert from plain text to hexadecimal values
Title Case Converter
Unit Converter
Convert between metric and imperial units of length, weight/mass, and volume instantly. Free, accurate, and runs entirely in your browser.
YAML to JSON Converter
Free YAML to JSON converter that runs in your browser. Paste YAML and instantly get formatted JSON with syntax checking. No uploads required.
Text Conversion Tools
These tools transform text from one form to another — changing case, converting between number formats, encoding text for use in different systems, and more.
Case Converters
Text case is surprisingly important in web publishing, legal documents, and design. The tools here handle the most common conversions:
- Capitalise first letters — capitalises the first letter of every word, useful for headings, titles, and names.
- Title case converter — applies proper title case rules, which are more nuanced than simply capitalising every word. Articles, prepositions, and conjunctions below a certain length are lowercased unless they start the title.
- Case converter — converts between UPPERCASE, lowercase, Title Case, Sentence case, and other formats in one tool.
Number Converters
- Number to words — converts a numeric value (like 1,234,567) to its written English equivalent ("one million two hundred thirty-four thousand five hundred sixty-seven"). Useful for legal documents, cheques, and formal writing.
- Text to binary — converts text characters to their binary (base 2) representation. Each character is shown as an 8-bit binary string. Useful for learning about how computers represent text internally.
- Text to hexadecimal — converts text to its hexadecimal (base 16) byte representation. Useful for debugging, encoding work, and understanding character encodings.
Encoding Tools
- Base64 encode — converts text or file content to its Base64 representation, ready to use in data URIs, HTTP headers, or JSON payloads.
- Reverse words — reverses the order of words in a sentence or list. Sometimes useful for formatting, testing text-processing tools, or generating reversed text puzzles.
- Text to slug — converts a phrase or title into a URL-friendly slug: lowercased, spaces replaced with hyphens, special characters removed. Useful for generating permalink slugs for blog posts, page titles, and product names.
Frequently Asked Questions
- What is the difference between title case and sentence case?
- Title case capitalises the first letter of most words (with exceptions for small words like "a", "the", "of"). Sentence case capitalises only the first word of the sentence and proper nouns — like a normal English sentence. Different style guides (APA, Chicago, AP) have different rules for which words to capitalise in titles.
- What is a URL slug?
- A slug is the part of a URL that identifies a specific page. For example, in
example.com/blog/my-great-article, the slug ismy-great-article. Slugs use only lowercase letters, digits, and hyphens — no spaces, punctuation, or special characters. - Why does text to binary produce such long output?
- Each character is represented as 8 binary digits (one byte). A single letter "A" becomes "01000001". A short sentence of 20 characters produces 160 binary digits. This is how computers store and transmit all text internally.