Convert Roman numerals to numbers and convert numbers to Roman numerals.
Your files and input stay in your browser. No account or upload required.
Base64 file converter — Convert a string, file, or image into its base64 representation.
Base64 string encoder/decoder — Simply encode and decode strings into their base64 representation.
Basic auth generator — Generate a base64 basic auth header from a username and password.
Email normalizer — Normalize email addresses to a standard format for easier comparison. Useful for deduplication and data cleaning.
ASCII Art Text Generator — Create ASCII art text with many fonts and styles.
Text to Unicode — Parse and convert text to unicode and vice-versa
Outlook Safelink decoder — Decode Outlook SafeLink links
XML to JSON — Convert XML to JSON
JSON to XML — Convert JSON to XML
Regex Tester — Test your regular expressions with sample text.
Regex cheatsheet — Javascript Regex/Regular Expression cheatsheet
Markdown to HTML — Convert Markdown to Html and allow to print (as PDF)
PDF signature checker — Verify the signatures of a PDF file. A signed PDF file contains one or more signatures that may be used to determine whether the contents of the file have been altered since the file was signed.
Numeronym generator — A numeronym is a word where a number is used to form an abbreviation. For example, "i18n" is a numeronym of "internationalization" where 18 stands for the number of letters between the first i and the last n in the word.
MAC address generator — Enter the quantity and prefix. MAC addresses will be generated in your chosen case (uppercase or lowercase)
Text to ASCII binary — Convert text to its ASCII binary representation and vice-versa.
ULID generator — Generate random Universally Unique Lexicographically Sortable Identifier (ULID).
IBAN validator and parser — Validate and parse IBAN numbers. Check if an IBAN is valid and get the country, BBAN, if it is a QR-IBAN and the IBAN friendly format.
String obfuscator — Obfuscate a string (like a secret, an IBAN, or a token) to make it shareable and identifiable without revealing its content.
Text diff — Compare two texts and see the differences between them.
Emoji picker — Copy and paste emojis easily and get the unicode and code points value of each emoji.
Password strength analyser — Discover the strength of your password with this client-side-only password strength analyser and crack time estimation tool.
YAML to TOML — Parse and convert YAML to TOML.
JSON to TOML — Parse and convert JSON to TOML.
TOML to YAML — Parse and convert TOML to YAML.
TOML to JSON — Parse and convert TOML to JSON.
JSON to CSV — Convert JSON to CSV with automatic header detection.
Camera recorder — Take a picture or record a video from your webcam or camera.
List converter — This tool can process column-based data and apply various changes (transpose, add prefix and suffix, reverse list, sort list, lowercase values, truncate values) to each row.
Phone parser and formatter — Parse, validate and format phone numbers. Get information about the phone number, like the country code, type, etc.
JSON diff — Compare two JSON objects and get the differences between them.
IPv4 range expander — Given a start and an end IPv4 address, this tool calculates a valid IPv4 subnet along with its CIDR notation.
HTTP status codes — The list of all HTTP status codes, their name, and their meaning.
YAML to JSON converter — Simply convert YAML to JSON with this online live converter.
JSON to YAML converter — Simply convert JSON to YAML with this online live converter.
IPv6 ULA generator — Generate your own local, non-routable IP addresses for your network according to RFC4193.
IPv4 address converter — Convert an IP address into decimal, binary, hexadecimal, or even an IPv6 representation of it.
Benchmark builder — Easily compare execution time of tasks with this very simple online benchmark builder.
User-agent parser — Detect and parse Browser, Engine, OS, CPU, and Device type/model from an user-agent string.
IPv4 subnet calculator — Parse your IPv4 CIDR blocks and get all the info you need about your subnet.
Docker run to Docker compose converter — Transforms "docker run" commands into docker-compose files!
HTML WYSIWYG editor — Online, feature-rich WYSIWYG HTML editor which generates the source code of the content immediately.
RSA key pair generator — Generate a new random RSA private and public pem certificate key pair.
Text to NATO alphabet — Transform text into the NATO phonetic alphabet for oral transmission.
Slugify string — Make a string url, filename and id safe.
Keycode info — Find the javascript keycode, code, location and modifiers of any pressed key.
JSON minify — Minify and compress your JSON by removing unnecessary whitespace.
Bcrypt — Hash and compare text string using bcrypt. Bcrypt is a password-hashing function based on the Blowfish cipher.
BIP39 passphrase generator — Generate a BIP39 passphrase from an existing or random mnemonic, or get the mnemonic from the passphrase.
Case converter — Transform the case of a string and choose between different formats
Chmod calculator — Compute your chmod permissions and commands with this online chmod calculator.
Chronometer — Monitor the duration of a thing. Basically a chronometer with simple chronometer features.
Color converter — Convert color between the different formats (hex, rgb, hsl and css name)
Crontab generator — Validate and generate crontab and get the human-readable description of the cron schedule.
Date-time converter — Convert date and time into the various different formats
Device information — Get information about your current device (screen size, pixel-ratio, user agent, ...)
Encrypt / decrypt text — Encrypt clear text and decrypt ciphertext using crypto algorithms like AES, TripleDES, Rabbit or RC4.
ETA calculator — An ETA (Estimated Time of Arrival) calculator to determine the approximate end time of a task, for example, the end time and duration of a file download.
Percentage calculator — Easily calculate percentages from a value to another value, or from a percentage to a value.
Git cheatsheet — Git is a decentralized version management software. With this cheatsheet, you will have quick access to the most common git commands.
Hash text — Hash a text string using the function you need : MD5, SHA1, SHA256, SHA224, SHA512, SHA384, SHA3 or RIPEMD160
Hmac generator — Computes a hash-based message authentication code (HMAC) using a secret key and your favorite hashing function.
Escape HTML entities — Escape or unescape HTML entities (replace characters like <,>, &, " and \' with their HTML version)
Integer base converter — Convert a number between different bases (decimal, hexadecimal, binary, octal, base64, ...)
JSON prettify and format — Prettify your JSON string into a friendly, human-readable format.
JWT parser — Parse and decode your JSON Web Token (jwt) and display its content.
Lorem ipsum generator — Lorem ipsum is a placeholder text commonly used to demonstrate the visual form of a document or a typeface without relying on meaningful content
Math evaluator — A calculator for evaluating mathematical expressions. You can use functions like sqrt, cos, sin, abs, etc.
Open graph meta generator — Generate open-graph and socials HTML meta tags for your website.
MIME types — Convert MIME types to file extensions and vice-versa.
OTP code generator — Generate and validate time-based OTP (one time password) for multi-factor authentication.
QR Code generator — Generate and download a QR code for a URL (or just plain text), and customize the background and foreground colors.
WiFi QR Code generator — Generate and download QR codes for quick connections to WiFi networks.
Random port generator — Generate random port numbers outside of the range of "known" ports (0-1023).
Roman numeral converter — Convert Roman numerals to numbers and convert numbers to Roman numerals.
SQL prettify and format — Format and prettify your SQL queries online (it supports various SQL dialects).
SVG placeholder generator — Generate svg images to use as a placeholder in your applications.
Temperature converter — Degrees temperature conversions for Kelvin, Celsius, Fahrenheit, Rankine, Delisle, Newton, Réaumur, and Rømer.
Text statistics — Get information about a text, the number of characters, the number of words, its size in bytes, ...
Token generator — Generate random string with the chars you want, uppercase or lowercase letters, numbers and/or symbols.
Encode/decode URL-formatted strings — Encode text to URL-encoded format (also known as "percent-encoded"), or decode from it.
URL parser — Parse a URL into its separate constituent parts (protocol, origin, params, port, username-password, ...)
UUIDs generator — A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems. The number of possible UUIDs is 16^32, which is 2^128 or about 3.4x10^38 (which is a lot!).
MAC address lookup — Find the vendor and manufacturer of a device by its MAC address.
XML formatter — Prettify your XML string into a friendly, human-readable format.
YAML prettify and format — Prettify your YAML string into a friendly, human-readable format.