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.

Stopwatch Online

Online stopwatch timer supports online stopwatch timing, millisecond time, pause, mark and download functions.

Countdown Timer Online

Countdown timer online supports online countdown. After the countdown, you can set the sound of playing alarm.

Unit Converter Online

Unit converter online supports the conversion of multiple units such as length, weight, area, volume data.

Longitude Latitude Query and Positioning

Longitude Latitude Query and Positioning online:pick up the longitude and latitude coordinates through the online map, or query the longitude and latitude coordinates of the address. You can also reverse query the address information through the longitude and latitude coordinates.

Chinese Allegorical Sayings

Chinese allegorical sayings full list, chinese allegorical sayings query online.This tool contains more than 14000 allegorical sayings.

Schulte Table Attention Test Online

Online Schulte table attention test, generate a table with 25 small squares, shuffle the numbers from 1 to 25, and fill them in the table for attention testing or training. The generated Schulte table supports downloading to the local location.

Convert Image to Pixel Image Online

The online image to Pixel image tool converts uploaded images to pixel style images. The converted pixel images can be downloaded locally.

Anti-Motivational Quote

Randomly display anti-motivational sentences online

Longitudinal Redundancy Check Calculator Online

Online LRC Check (Longitudinal Redundancy Check) calculator calculates the longitudinal redundancy check value (LRC) of input data. The input data supports text, HEX data, and Base64 data, and the check value results are displayed in HEX, decimal, octal, and binary formats.

HTML to JS Converter Online

HTML to JS converter online, providing the function of HTML source code to JS variable. It can be converted based on template string or ordinary string concatenating.

Molodensky Transform Online

The Molodensky transform online tool converts directly from geodetic coordinates to geodetic coordinates, without the intermediate shifts to and from cartesian geocentric coordinates. The Molodensky transformation is simple to implement and to parametrize, requiring only the 3 shifts between the input and output frame, and the corresponding differences between the semimajor axes and flattening parameters of the reference ellipsoids.

WGS84 and CGCS2000 Coordinate Converter Online

Online WGS84 and CGCS2000 coordinates high-precision conversion tool, supports different versions of WGS84 coordinates and CGCS2000 coordinates conversion each other. The input coordinates support XYZ spatial cartesian coordinates and LBH geodetic coordinates. The conversion supports epoch calculation and ITRF framework coordinate conversion.

Coordinate Transformation Parameter Solving Online

Online coordinate transformation parameter solving tool, input a set of known point coordinates, and solve the parameters used for three parameter, four parameter, and seven parameter coordinate transformations. The coordinate transformation method supports the Helmert and Bursa-Wolf models, and the input coordinates support 2D and 3D coordinates, as well as spatial Cartesian and geodetic coordinates.

Local Font Preview Online

Online local font preview tool, open local font files or read locally installed fonts to view the display effect of fonts. Support opening WOFF2, Fonts in WOFF, TTF, and OTF formats.

ITRF Coordinate Transformation Tool Online

Online ITRF Coordinate Transformation Tool: A coordinate transformation utility utilizing ITRF transformation parameters for conversions between ITRF reference frames, supporting epoch conversion via velocity fields. Compatible with over a dozen ITRF frameworks including ITRF2020, ITRF2014, ITRF97, and others. Accepts input coordinates in both geodetic (LBH: Latitude, Longitude, Height) and geocentric Earth-fixed (XYZ) formats.

Pi Digits Query Online

Online PI(π) query tool, supports querying the PI value of the specified number of digits after the decimal point, and supports querying up to 1,000,000 (one million) digits. The result can be copied and downloaded.

Subtitle Format Converter Online

Online subtitle format conversion, support subtitle format lrc,srt,vtt,sbv,ass,ssa,sub,scc,stl,ttml,itt conversion, support batch conversion. Support to set character set encoding and other parameters for subtitle format conversion.

Calculator Online

Online calculator. Enter a mathematical calculation expression and calculate the result of the expression. It supports various functions such as arithmetic functions, trigonometric functions, matrix functions, probability functions, relational functions, and statistical functions. It also supports the calculation of high precision floating - point numbers, large integers, complex numbers, and matrices.

Modify Image DPI Online

Online modify image DPI tool, support single or batch modify image DPI (dots per inch), support modify jpg, jpeg, png, bmp, webp format images.

OTP Code Generator Online

Online OTP Password Generator, supports generating TOTP(Time-Based One-Time Password) and HOTP(HMAC-based One-time Password) passwords. The generated TOTP passwords can be imported into Google Authenticator and Microsoft Authenticator.

Data Masking Online

Online data masking tool that supports opening txt, csv, json, and excel data to perform hash masking, mask masking, replacement masking, transformation masking, encryption masking, and shuffling masking on sensitive data. The desensitized data can be downloaded locally.

KMAC Calculate and Verify Online

Online KMAC (KECCAK Message Authentication Code) calculation and verification tool, supporting online calculation and verification of KMAC. Support input data and keys, select KMAC-128 or KMAC-256 algorithm, set output bit length and other parameters.

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.