Generate random string with the chars you want, uppercase or lowercase letters, numbers and/or symbols.

A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems.

Generate random Universally Unique Lexicographically Sortable Identifier (ULID).

Generate a BIP39 passphrase from an existing or random mnemonic, or get the mnemonic from the passphrase.

Generate a new random RSA private and public pem certificate key pair.

Generate and validate time-based OTP (one time password) for multi-factor authentication.

Generate random port numbers outside of the range of 'known' ports (0-1023).

Enter the quantity and prefix. MAC addresses will be generated in your chosen case.

Generate your own local, non-routable IP addresses for your network according to RFC4193.

Hash a text string using the function you need : MD5, SHA1, SHA256, SHA224, SHA512, SHA384, SHA3 or RIPEMD160.

Hash and compare text string using bcrypt. Bcrypt is a password-hashing function based on the Blowfish cipher.

Encrypt clear text and decrypt ciphertext using crypto algorithms like AES, TripleDES, Rabbit or RC4.

Computes a hash-based message authentication code (HMAC) using a secret key and your favorite hashing function.

Discover the strength of your password with this client-side-only password strength analyser and crack time estimation tool.

Convert date and time into the various different formats.

Convert a number between different bases (decimal, hexadecimal, binary, octal, base64, ...).

Convert Roman numerals to numbers and convert numbers to Roman numerals.

Simply encode and decode strings into their base64 representation.

Convert a string, file, or image into its base64 representation.

Convert color between the different formats (hex, rgb, hsl and css name).

Simply convert YAML to JSON with this online live converter.

Parse and convert YAML to TOML.

Simply convert JSON to YAML with this online live converter.

Parse and convert JSON to TOML.

Parse and convert TOML to JSON.

Parse and convert TOML to YAML.

Convert XML to JSON.

Convert JSON to XML.

Degrees temperature conversions for Kelvin, Celsius, Fahrenheit, Rankine, Delisle, Newton, Réaumur, and Rømer.

Transform the case of a string and choose between different formats.

Transform text into the NATO phonetic alphabet for oral transmission.

Convert text to its ASCII binary representation and vice-versa.

Parse and convert text to unicode and vice-versa.

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.

Make a string url, filename and id safe.

Get information about a text, the number of characters, the number of words, its size in bytes, ...

Compare two texts and see the differences between them.

A numeronym is a word where a number is used to form an abbreviation. For example, "i18n" is a numeronym of "internationalization".

Create ASCII art text with many fonts and styles.

Lorem ipsum is a placeholder text commonly used to demonstrate the visual form of a document or a typeface without relying on meaningful content.

Obfuscate a string (like a secret, an IBAN, or a token) to make it shareable and identifiable without revealing its content.

Parse a URL into its separate constituent parts (protocol, origin, params, port, username-password, ...).

Parse and decode your JSON Web Token (jwt) and display its content.

Detect and parse Browser, Engine, OS, CPU, and Device type/model from an user-agent string.

Normalize email addresses to a standard format for easier comparison. Useful for deduplication and data cleaning.

Parse, validate and format phone numbers. Get information about the phone number, like the country code, type, etc.

Validate and parse IBAN numbers. Check if an IBAN is valid and get information about it.

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.

Prettify your JSON string into a friendly, human-readable format.

Minify and compress your JSON by removing unnecessary whitespace.

Format and prettify your SQL queries online (it supports various SQL dialects).

Prettify your XML string into a friendly, human-readable format.

Prettify your YAML string into a friendly, human-readable format.

Git is a decentralized version management software. With this cheatsheet, you will have quick access to the most common git commands.

Test your regular expressions with sample text.

Javascript Regex/Regular Expression cheatsheet.

Compute your chmod permissions and commands with this online chmod calculator.

Transforms 'docker run' commands into docker-compose files!

The list of all HTTP status codes, their name, and their meaning.

Compare two JSON objects and get the differences between them.

Validate and generate crontab and get the human-readable description of the cron schedule.

Find the javascript keycode, code, location and modifiers of any pressed key.

Parse your IPv4 CIDR blocks and get all the info you need about your subnet.

Convert an IP address into decimal, binary, hexadecimal, or even an IPv6 representation of it.

Given a start and an end IPv4 address, this tool calculates a valid IPv4 subnet along with its CIDR notation.

Find the vendor and manufacturer of a device by its MAC address.

Generate and download a QR code for a URL (or just plain text), and customize the background and foreground colors.

Generate and download QR codes for quick connections to WiFi networks.

Generate svg images to use as a placeholder in your applications.

Take a picture or record a video from your webcam or camera.

A calculator for evaluating mathematical expressions. You can use functions like sqrt, cos, sin, abs, etc.

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.

Easily calculate percentages from a value to another value, or from a percentage to a value.

Monitor the duration of a thing. Basically a chronometer with simple chronometer features.

Get information about your current device (screen size, pixel-ratio, user agent, ...).

Generate a base64 basic auth header from a username and password.

Generate open-graph and socials HTML meta tags for your website.

Convert MIME types to file extensions and vice-versa.

Online, feature-rich WYSIWYG HTML editor which generates the source code of the content immediately.

Decode Outlook SafeLink links.

Convert JSON to CSV with automatic header detection.

Convert Markdown to Html and allow to print (as PDF).

Encode text to URL-encoded format (also known as 'percent-encoded'), or decode from it.

Escape or unescape HTML entities (replace characters like <,>, &, " and ' with their HTML version).

Easily compare execution time of tasks with this very simple online benchmark builder.

Copy and paste emojis easily and get the unicode and code points value of each emoji.