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.

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.

BMI Index Calculator

Online free BMI index calculator provides BMI index calculation, introduction of BMI calculation formula and display of BMI normal value range.

Loan Prepayment Calculator

Online prepayment calculator, which calculates the saved interest or reduced loan time for loans with equal principal or interest after prepayment, as well as detailed comparison information before and after prepayment.

Convert Text To Image Online

The online text generation image tool supports the generation of images from single or multiple lines of text, supports the customization of foreground color, background color, text size and other parameters, and supports jpg, jpeg, png, webp and other formats of images.

Morse Code Convert Online

Morse Code Convert Online supports encoding text (including Chinese) into Morse code and decoding Morse code into ordinary text. Text supports all unicdoe characters.

Lottery Draw Turntable Online

Online lottery draw turntable tool, supporting setting lottery options, option weights, then random select lottery option. The lottery results can be downloaded locally.

Variance and Standard Deviation Calculator Online

The online variance and standard deviation calculator calculates the sample standard deviation, sample variance, population standard deviation and population variance of the input values.

Convert JSON to Excel Online

Online JSON to Excel tool, input or open JSON data, convert it into Excel or CSV files, and the converted Excel and CSV files can be downloaded locally.

Random Group Generator Online

Online random grouping tool, enter a set of data and perform random grouping. The grouping results can be downloaded as txt or Excel files.

PDF Text Recognition Online

The PDF text tecognition online tool supports the detection and recognition of text in PDF files. The tool has high recognition accuracy and stable service performance.

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.

DateTime Type Converter Online

Online datetime type conversion tool, supporting TAI time, UTC time, GPS time (GPST), Beidou time (BDT), Unix timestamp, and local time conversion. This tool supports batch conversion, and the conversion results can be downloaded locally.

Random Roll Call Online

Online random roll call tool, fill out a list, and randomly call. Support setting list grouping, randomly selecting multiple results at once, and allowing multiple parameters such as duplicate extraction.

Batch Image Rotate Online

Online batch image rotation tool, supporting batch rotation of images in jpeg, jpg, webp, png, and svg formats. Supports arbitrary rotation angle settings, and the rotated images can be downloaded locally.

Random Name Generator Online

Online random name generator, generating random names online, supporting dozens of languages such as Chinese, English, French, Japanese, etc. It supports setting gender, number of generated names, surname, first name, and other parameters.

Data Process Online

Online data processing tool that supports opening text files and Excel spreadsheets, using custom JavaScript to process data, and downloading processing results as text files and Excel spreadsheets.

Image Viewer Online

Online image viewer, view images in JPEG, JPG, PNG, webP, SVG, GIF and BMP formats, supporting image viewing operations such as scaling, rotation, and mirroring.