Popular Recommendation
Random Number Generator Online
The online random number generator supports the generation of random integer values and random floating-point values. When unique is specified, all generated random numbers are not repeated.
Countdown Timer Online
Countdown timer online supports online countdown. After the countdown, you can set the sound of playing alarm.
Stopwatch Online
Online stopwatch timer supports online stopwatch timing, millisecond time, pause, mark and download functions.
CRC Calculation Online
The cyclic redundancy check calculation function of CRC8, CRC16, CRC32 and crc64 is provided to detect or verify possible errors after data transmission or saving. It uses the principle of division and remainder to detect errors. When calculating, pay attention to different algorithms (including polynomial, initial value, whether to reverse, etc.), and the calculation results will be different.
Basal Metabolic Rate Calculator Online
The online basal metabolic rate calculator (BMR calculator) uses multiple formulas to calculate the body's basal metabolic rate based on parameters such as height, weight, and age, and supports evaluating the daily calorie consumption of the body under different exercise states.
HTML Encode / Decode Online
HTML encoding and decoding tool, providing HTML entity online Decode and Encode functions. This tool supports encoding reserved characters in HTML into HTML character entities, and converting HTML character entities into corresponding characters.
Online Foreigner Permanent Residence ID Card Number Generator
The online tool for generating permanent residence ID card numbers in China for foreigners can generate 18 new versions of permanent residence ID card numbers online. It supports user-defined countries, accepting provinces, birth dates and other parameters. The generated results can be downloaded locally.
YAML Editor Online
Yaml editor online, which can edit YAML and YML documents online, then copy or download the edited documents.
Linux Command Documentation
Linux command document query, you can query the man documents of all common linux commands. You can also query some built-in bash command / function documents.
IP Number Converter
IP and numbers are converted to each other, and the converted number is a 32-bit unsigned integer number. IPv4 address is a 32-bit binary number, which is usually divided into 4 "8-bit binary numbers" (that is, 4 bytes). IP addresses are usually expressed in the form of (a.b.c.d) by "dotted decimal", where a, B, C and D are decimal integers between 0 and 255. For example, the dotted decimal IP address (100.4.5.6) is actually a 32-bit binary number (01100100.00000100.00000101.00000110).
JSON Schema Validate Online
Online JSON Schema verification tool, input JSON data and JSON Schema format, and verify whether JSON data conforms to the format defined by Schema.
CSS Selectors Reference
The CSS selector defines the range of elements that CSS rules apply to. This tool provides a reference manual for CSS universal selectors, type selectors, class selectors, id selectors, combination selectors, attribute selectors, pseudo class selectors, and so on. It also shows the CSS Level that this selector was introduced into.
Latest Online
BCrypt Derive Key and Verify Online
Online BCrypt derived key and verification tool, using the bcrypt Password Based Key Derivation Function to derive keys based on passwords and random salt, supporting custom cost and other parameters. Support online verification of BCrypt derived keys.
SCrypt Derive Key and Verify Online
Online SCrypt derived key and verification tool, using scrypt Password Based Key Derivation Function to derive keys based on password and random salt, supporting custom block size, CPU/memory cost, parallelization, derived key length and other parameters. Support online verification of SCrypt derived keys.
Chinese Idiom Fill Online
Online chinese idiom fill in the blank tool, fill in the text of chinese idioms at any position, and search for chinese idioms. Support filling in one or more words.
HKDF Derive Key and Verify Online
Online HKDF derived key and verification tool, using the HMAC-based Extract-and-Expand Key Derivation Function algorithm, derives keys based on the input key and random salt, supports custom hash functions, derived key length, carried information and other parameters. Support online verification of HKDF derived keys.
PBKDF2 Derive Key and Verify Online
Online PBKDF2 derived key and verification tool, using Password Based Key Derivation Function 2 to export keys based on passwords and random salt, supporting custom hash functions, derived key length, iteration times and other parameters. Support online verification of PBKDF2 derived keys.
Keyboard Event Information Online
Online keyboard key information tool, displaying key, code, keycode, location, modifiers and other key information of keyboard key events in web pages, and providing a key information query comparison table.
Child Height Calculator Online
Online height calculator for children, predicting and calculating their height based on multiple parameters, and providing height standard references for different age groups.
ULID Generator Online
Online ULID generator, supports batch generation of ULIDs, and the generated ULIDs can be downloaded locally.
UUID Format Convert and Verify Online
Online UUID conversion and verification tool, supporting the conversion of UUIDs in string, hex, binary, and base64 formats. Support verifying whether the input string is a valid UUID and the corresponding UUID version.
Shield Badge Generator Online
An online tool for creating shield badges, which supports setting parameters such as label, color, style, and adding logos. It also supports downloading as SVG, PNG, JPEG, or WebP images.
Template Data Generator Online
An online template data generation tool that generates string/JSON/binary HEX format data based on a specified format or protocol. The data field supports randomly generating integers, floating-point numbers, strings, and supports field references and JavaScript programming calculations.
Make Danmaku Online
Online handheld danmaku tool, supporting online generation of handheld danmaku and scrolling LED text. Support setting parameters such as text font, text color, text size, background color, background image, scrolling speed, etc. Support gradient color text, blinking text and other effects.
