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.

Image Mirror Flip Online

Online image flipping tool, which supports flipping images from left to right, up and down.

Java Regular Expression Test

Java regular expression online testing provides Java regular expression online matching and replacement functions. By controlling parameter settings, you can control the behavior of regular expressions, such as ignoring case, multiline mode, etc.

String Encode and Decode

The online text encryption and decryption tool supports the encoding and decoding of text to base64, hex, urlencode, html entities, and MD5.

Digital Binary Converter

Support float and binary / hexadecimal conversion, double and binary / hexadecimal conversion, short and binary / hexadecimal conversion, int and binary / hexadecimal conversion, long and binary / hexadecimal conversion. The byte order needs to be selected during conversion, and the default is large end order. Big end mode means that the high byte of data is saved in the low address of memory. Small end mode means that the high byte of data is saved in the high address of memory.

Golang Regular Expression Test Online

Golang regular expression test online tool provides online matching and replacement of golang regular expressions. This tool supports golang regular expression matching, golang regular expression splitting strings, and golang regular expression replacing strings.

Chinese Retirement Age Calculator Online

Online retirement age calculator, supporting the calculation of retirement age for male employees, ordinary female employees (formerly 50 year old retired female employees), female employees in management, technology, and cadre positions (formerly 55 year old retired female employees), as well as the number of months of delayed retirement after the reform. This tool displays both flexible early retirement and flexible delayed retirement times.

Binary Data Format Converter Online

Online binary format conversion tool, supporting binary data conversion between hex string, hex prefix string, binary string, base64 string, raw format, and downloading the conversion results locally.

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.

Geohash Encode Decode Online

Online Geohash encoding and decoding tool, supports Geohash encoding and decoding of latitude and longitude positions, supports querying all coordinate points within a specified radius of the center point, and supports querying the closest coordinate point to the center point.

BaseN Encode and Decode Online

Online BaseN encoding and decoding tool, supporting BaseN encoding and decoding of data such as string, hex, base64, files, etc., supporting algorithms such as base2, base8, base16, base32, base64, base58, base85, base91, base100, etc. This tool also supports custom algorithms.

MessagePack and JSON Converter Online

Online Message Pack and JSON conversion tool, supporting the conversion between binary data in Message Pack format and data in JSON text format. Message Pack data supports input formats such as hex, base64, byte arrays, etc.

Fetal Weight Calculator Online

Online fetal weight calculator predicts and calculates fetal weight based on parameters such as uterine height, abdominal circumference, biparietal diameter, and femur length. Support viewing the distribution of fetal weight, biparietal diameter, abdominal circumference, femur length, and other parameters at different weeks.

ABC Music Notation Editor Online

Online ABC score editor, using ABC notation method to edit scores, supports real-time preview of generated staff, and supports downloading as MIDI and WAV files.

Nano ID Generator Online

Online Nano ID generator, supports batch generation of Nano IDs, supports custom alphabet, and custom Nano ID length.

Mermaid Chart Editor Online

Online Mermaid Chart Editor, supports real-time input and preview of text generated charts in Mermaid syntax format, and supports downloading charts in SVG, PNG, JPEG, and WebP formats.

NMEA-0183 Protocol Analysis Online

Online NMEA-0183 protocol parsing tool, supports parsing dozens of messages including NMEA-0183 DTM, GBS, GGA, GLL, GNS, GRS, GSA, GST, GSV, THS, RMC, ROT, VTG, ZDA, etc., and supports NMEA-0183 checksum generation.

SM2 Signature and Verification Online

Online SM2 signature and verification tool, supporting signature generation and verification functions for SM2 algorithms.

SM2 Encryption and Decryption Online

Online SM2 encryption and decryption tool, supporting public key encryption and private key decryption of the SM2 algorithm. Supports input of public and private keys in PEM and HEX formats, and supports input data and output results in string, hex, and base64 formats.

String Escape Online

Online string escaping tool, supporting escaping rules for languages such as JSON, Java, JavaScript, XML, HTML, CSV, etc., and supporting custom rule string escaping. This tool also supports unescape of strings.

SM4 Encryption and Decryption Online

The online SM4 encryption and decryption tool provides online SM4 encryption and decryption test. The encryption and decryption supports six modes: CBC, CFB, OFB, CTR, GCM and ECB, and the input and output supports three formats: hex, string and Base64.