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411 online tools , 101574194 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.

Stopwatch Online

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

Unit Converter Online

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

Countdown Timer Online

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

Emoticons Collection Online

Online emoticons collection, displaying cute and interesting text expression emoji, supporting one-click copying.

Color Blindness Test Online

Online color blind color weakness test, using color blind images for online color blind color weakness test, the test results include color blind color weakness level, color blind color weakness type (red green color blind, red blind, green blind).

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XOR Checksum / BCC Checksum Online

The Block Check Character (BCC) online calculation tool supports online calculation BCC values of binary data (hex representation), string data and file data, so as to detect whether there are errors in the data transmission process.

Image Color Picker Online

The image color picker online, extracts color values at any position of the image.

Number Process Online

Online number processing tool, which supports adding thousands separators, Scientific notation conversion, number to words, number to Chinese words and other functions, the tool supports batch processing.

Braille Input Online

Online Braille Input Tool, using letter and number keyboards to input Braille online. The input Braille supports 6-dot Braille and 8-dot Braille.

Random Hex Generator Online

The online random hex string generation tool supports the generation of hex strings of any length, which can be downloaded as hex text files and binary bin files.

Random Number with Sum Generator Online

Online sum random number generation tool, supporting the random generation of random numbers within a specified range, with a sum equal to the specified value. Support random generation of integers and decimals, integers support generation of large integers, decimals support precision to 1000 decimal places.

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Number Sort Online

Online number sorting tool that supports sorting a large number of input numbers and supports multiple ways of inputting or extracting numbers. Supports sorting very large integers and very large floating-point numbers.

ChaCha20 Encrypt and Decrypt Online

Online ChaCha20 Encryption and Decryption Tool, supporting ChaCha20, XChaCha20, ChaCha20-Poly1305, and XChaCha20-Poly1305 algorithms for encryption and decryption, with input data formats including string, hex, and base64, and the ability to select from multiple character sets.

Information Entropy Calculator Online

The online information entropy (Shannon entropy) calculator supports calculating the entropy of binary data, text data, and probability distributions, and supports setting the logarithmic base to 2, e, and 10. Support setting result precision.

Protocol Buffers Encode and Decode Online

Online Protocol Buffer Encoding and Decoding Tool, supporting online decoding of protocol buffer data and online encoding of protocol buffer data. Supports opening multiple proto definition files and decoding and encoding multiple messages.

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.