IT Tools - Handy tools for developers

All the tools

AES advanced encrypt / decrypt - Encrypt and decrypt text with AES using an explicit key and IV (hex, base64 or text) in CBC, GCM, CTR or ECB mode, for interoperability with other systems.
ASCII Art Text Generator - Create ASCII art text with many fonts and styles.
Integer base converter - Convert a number between different bases (decimal, hexadecimal, binary, octal, base64, ...)
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.
Bcrypt - Hash and compare text string using bcrypt. Bcrypt is a password-hashing function based on the Blowfish cipher.
Benchmark builder - Easily compare execution time of tasks with this very simple online benchmark builder.
BIP39 passphrase generator - Generate a BIP39 passphrase from an existing or random mnemonic, or get the mnemonic from the passphrase.
Camera recorder - Take a picture or record a video from your webcam or camera.
Case converter - Transform the case of a string and choose between different formats
X.509 certificate parser - Decode a PEM or DER certificate (or a whole chain) and see the subject, issuer, validity and days left, SAN, key type, key usage, extensions and fingerprints. Everything runs in your browser.
Traditional / Simplified Chinese converter - Convert text between Simplified Chinese and Traditional Chinese (Taiwan, Hong Kong, with optional Taiwanese phrases such as 软件 → 軟體) using OpenCC, entirely in your browser.
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.
CSV to JSON - Parse CSV (or TSV) into JSON, with delimiter detection, type inference and a table preview.
Date calculator - Count the days between two dates, or add and subtract days from a date. Exclude chosen weekdays and Taiwan public holidays to count working days.
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, ...)
Docker run to Docker compose converter - Transforms "docker run" commands into docker-compose files!
Email normalizer - Normalize email addresses to a standard format for easier comparison. Useful for deduplication and data cleaning.
Emoji picker - Copy and paste emojis easily and get the unicode and code points value of each emoji.
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.
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)
HTML WYSIWYG editor - Online, feature-rich WYSIWYG HTML editor which generates the source code of the content immediately.
HTTP status codes - The list of all HTTP status codes, their name, and their meaning.
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.
Image compressor - Compress images and convert them to WebP, JPEG or PNG, resize them, and download them one by one or as a zip.
IPv4 address converter - Convert an IP address into decimal, binary, hexadecimal, or even an IPv6 representation of it.
IPv4 range expander - Given a start and an end IPv4 address, this tool calculates a valid IPv4 subnet along with its CIDR notation.
IPv4 subnet calculator - Parse your IPv4 CIDR blocks and get all the info you need about your subnet.
IPv6 ULA generator - Generate your own local, non-routable IP addresses for your network according to RFC4193.
JSON diff - Compare two JSON objects and get the differences between them.
JSON minify - Minify and compress your JSON by removing unnecessary whitespace.
JSON prettify and format - Prettify your JSON string into a friendly, human-readable format.
JSON to CSV - Convert JSON to CSV with automatic header detection.
JSON to TOML - Parse and convert JSON to TOML.
JSON to XML - Convert JSON to XML
JSON to YAML converter - Simply convert JSON to YAML with this online live converter.
JWT parser - Parse and decode your JSON Web Token (jwt) and display its content.
JWT sign and verify - Create a signed JSON Web Token from a header and payload, or verify a token's signature, with HS256/384/512, RS256/384/512, PS256/384/512 and ES256/384/512. Keys stay in your browser.
Keycode info - Find the javascript keycode, code, location and modifiers of any pressed key.
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.
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
MAC address generator - Enter the quantity and prefix. MAC addresses will be generated in your chosen case (uppercase or lowercase)
MAC address lookup - Find the vendor and manufacturer of a device by its MAC address.
Markdown to HTML - Convert Markdown to Html and allow to print (as PDF)
Math evaluator - A calculator for evaluating mathematical expressions. You can use functions like sqrt, cos, sin, abs, etc.
MIME types - Convert MIME types to file extensions and vice-versa.
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.
Open graph meta generator - Generate open-graph and socials HTML meta tags for your website.
OTP code generator - Generate and validate time-based OTP (one time password) for multi-factor authentication.
Password generator - Generate strong random passwords, memorable passphrases or PIN codes in your browser, with a strength estimate.
Password strength analyser - Discover the strength of your password with this client-side-only password strength analyser and crack time estimation tool.
PDF compressor - Compress PDFs in your browser: shrink scans and photo-heavy documents while keeping text selectable. Files are never uploaded.
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.
Percentage calculator - Easily calculate percentages from a value to another value, or from a percentage to a value.
Phone parser and formatter - Parse, validate and format phone numbers. Get information about the phone number, like the country code, type, etc.
QR Code generator - Generate and download a QR code for a URL (or just plain text), and customize the background and foreground colors.
Random port generator - Generate random port numbers outside of the range of "known" ports (0-1023).
Regex cheatsheet - Javascript Regex/Regular Expression cheatsheet
Regex Tester - Test your regular expressions with sample text.
Roman numeral converter - Convert Roman numerals to numbers and convert numbers to Roman numerals.
RSA key pair generator - Generate a new random RSA private and public pem certificate key pair.
Outlook Safelink decoder - Decode Outlook SafeLink links
Slugify string - Make a string url, filename and id safe.
SQL prettify and format - Format and prettify your SQL queries online (it supports various SQL dialects).
String obfuscator - Obfuscate a string (like a secret, an IBAN, or a token) to make it shareable and identifiable without revealing its content.
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 diff - Compare two texts and see the differences between them.
Text statistics - Get information about a text, the number of characters, the number of words, its size in bytes, ...
Text to ASCII binary - Convert text to its ASCII binary representation and vice-versa.
Text to NATO alphabet - Transform text into the NATO phonetic alphabet for oral transmission.
Text to Unicode - Parse and convert text to unicode and vice-versa
Timestamp batch converter - Convert many Unix timestamps at once into the timezone and format you need.
Token generator - Generate random string with the chars you want, uppercase or lowercase letters, numbers and/or symbols.
TOML to JSON - Parse and convert TOML to JSON.
TOML to YAML - Parse and convert TOML to YAML.
ULID generator - Generate random Universally Unique Lexicographically Sortable Identifier (ULID).
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, ...)
User-agent parser - Detect and parse Browser, Engine, OS, CPU, and Device type/model from an user-agent string.
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!).
WiFi QR Code generator - Generate and download QR codes for quick connections to WiFi networks.
XML formatter - Prettify your XML string into a friendly, human-readable format.
XML to JSON - Convert XML to JSON
YAML prettify and format - Prettify your YAML string into a friendly, human-readable format.
YAML to JSON converter - Simply convert YAML to JSON with this online live converter.
YAML to TOML - Parse and convert YAML to TOML.

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