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361 online tools , 33700860 times of use

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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.

String Hex Converter

String hex conversion (hex to string, string to hex) converts the string into a byte array using the selected character set. Each byte in the byte array is encoded into two hexadecimal characters to obtain the hex string result.

WEBSOCKET Test Online

The websocket online test tool can be used as a websocket client to connect to the websocket server of the intranet or public network, and supports receiving and sending text messages in real time. Websocket is a new protocol under HTML5. It realizes the full duplex communication between browser and server, which can better save server resources and bandwidth, and achieve the purpose of real-time communication. Like HTTP, it transmits data through the established TCP connection, but its biggest difference from HTTP is that websocket is a two-way communication protocol. After the connection is established, the websocket server and client can actively send or receive data to each other, just like socket; Like TCP, websocket needs to establish a connection first. Only after the connection is successful can they communicate with each other.

Text Character Set Encoding Query

Online text character set encoding query, input text data, and view the encoding of text in different character sets. Enter the text encoding to view the decoded text from different character sets.

Font Format Converter Online

Online font format conversion tool, supporting mutual conversion of font eot, otf, svg, ttf, woff, woff2 formats, generating font sample demos, and downloading the converted font files locally.

Barcode Sacnner Online

Online barcode scanning tool, supporting batch scanning of barcodes in EAN-13, EAN-8, UPC-A, UPC-E, Code 128, Code 39, Code 93, ITF and other code systems. The scanning results can be downloaded locally.

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.

Lorem Ipsum Generator Online

Lorem Ipsum Generator Online, randomly generating simplified Chinese, traditional Chinese, and English random lorem ipsum text. Generation supports setting parameters such as number of paragraphs, number of sentences, and number of words within a sentence. The generated random lorem ipsum text results support copying and downloading.

Countries/Regions of the World

Information query of national names, capitals, flags and currencies of countries all over the world.

Latest Online

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.

CMAC Calculate Online

Online CMAC (Cipher based Message Authentication Code) calculation tool, supporting the use of AES, DES, SM4 and other algorithms to calculate CMAC values. Input and output support string, hex, base64, binary formats.

Electronic Wooden Fish Online

Online electronic wooden fish tool, supporting setting wooden fish color, tapping sound effects, automatic tapping and other parameters.

Geodetic Latitude to Geocentric Latitude Converter Online

Online tool for converting geodetic latitude to geocentric latitude, supporting the conversion between geodetic latitude and geocentric latitude. This tool supports latitude batch conversion, with latitude units supporting degrees, radians, and degrees, and supports selecting or customizing ellipsoid parameters. The conversion result can be downloaded locally.

Coordinate Unit Converter Online

Online coordinate unit conversion tool that supports inputting 2D (XY or BL) coordinates, 3D coordinates (XYZ or BLH), 4D coordinates (XYZT, BLHT), and converting the units of length, angle, or time of the coordinates. This tool supports batch conversion of coordinate units, and the conversion results can be downloaded.