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.

Flower English Converter Online

The online flower english letter conversion tool converts English alphabet and numbers in the input text into fancy letters and numbers. The conversion result supports one key copy.

Duplicate Text Remove Online

Online text de duplication tool to remove globally repeated lines or continuous repeated lines. Support custom line split characters, whether to remove the blank space at the beginning and end of the line and other custom parameters.

Barcode Generator Online

Barcode Generator Online, which supports online barcode generation. This tool supports the generation of bar codes in CODE128, EAN13, CODE39, ITF, MSI and other formats

Chinese Relationship Calculator

Calculate online how to call Chinese relatives and how relatives call me. It also supports calculating the corresponding person relationship through relative.

Chinese Lunar Time Converter Online

The online chinese time conversion tool converts twelve units and ninety-six quarters into corresponding times, and converts time into corresponding units and quarters.

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).

JavaScript Object to JSON Online

Online JavaScript object to JSON tool, supporting the conversion of JavaScript objects and JSON data, and the converted results can be downloaded locally.

String Base32 Converter

The string base32 converter online tool provides the function of converting strings to base32. Conversion supports selecting character sets and setting newline character parameters.

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.

Flip Coin Online

Online coin flip tool, randomly flip coins to see if the result is heads or tails.

Ruler Online

Online ruler tool, supports measuring length online using centimeter ruler, inch ruler, and chinese chi ruler. Support setting parameters such as scale, ruler color, etc.

View and Remove Image Metadata Online

Online image metadata viewing and removal tool, supports viewing and removing various metadata information such as EXIF, GPS, IPTC, XMP, JFIF, etc. of images, and supports multiple image formats such as JPEG, JPG, PNG, WEBP, GIF, SVG, etc. This tool supports batch viewing and removal of image metadata.