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    MORE
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    MATH
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329 online tools , 25802180 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.

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.

Unit Converter Online

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

Caesar Cipher Encode and Decode Online

Online Caesar cipher encryption and decryption tool, supporting Caesar cipher encryption for text and decryption of Caesar ciphertext. The characters that support encryption include English lowercase letters, English uppercase letters, and Chinese characters.

Javascript Obfuscator Online

JavaScript obfuscation and encryption tool online supports online obfuscation and encryption of JavaScript code. Obfuscation supports low obfuscation high performance, medium obfuscation optimal performance, high obfuscation low performance modes. You can also control the detailed process of obfuscation by customizing parameters.

GPA Calculator Online

The online GPA calculator can input course grades and credits to calculate the GPA. This tool supports multiple GPA calculation algorithms.

Image Compression Online

The Image Compression Online tool supports online compression of common image formats such as PNG, JPG, JPEG, GIF, BMP,WBMP, etc. You can set the file size of the compressed picture and the pixel size of the compressed picture through parameter settings, and you can export the compressed picture for free.

JavaScript Regular Expression Test

JavaScript regular expression (JS regular expression) online test, providing JavaScript regular expression online matching and replacement functions. By controlling parameter settings, you can control the behavior of regular expressions, such as ignoring case, global mode, multiline mode, etc.

Image Crop

Online free image crop, you can select and crop part of the image online and download it as a new image. Cropping supports rectangular cropping and circular cropping, and supports custom selection area size.

Mathematical Formula Drawing Chart Online

The online mathematical formula drawing chart tool supports the input of any mathematical formula, and then the input formula is drawn into a chart. Formulas support trigonometric functions, exponents, logarithms, polynomials, addition, subtraction, multiplication and division, etc.

Sketch Image Generator Online

Online sketch image generator, upload images, generate black and white sketch style images.

Latest Online

Password Strength Detection Online

Online password strength testing tool, which checks the strength of the input password online. When the input password strength is weak, it provides suggestions to increase the password strength.

Matrix Calculator

Online matrix calculator, calculating addition, subtraction, multiplication, division, determinant, inverse matrix, transpose matrix, etc. The calculated matrix supports both real and complex matrices.

Chinese Pinyin First Letter Online

Online Chinese Pinyin Initial Abbreviation Tool, obtains the first letter of Chinese Pinyin in input text, supports parameter settings such as polyphonic characters, half width, and full width. The generated pinyin initials support downloading to the local device.

China Permanent Residence ID Card Number Query Online

Online permanent residence card number query tool, which can query the province, nationality, date of birth and other information contained in the new version of 18 foreigners' permanent residence ID card number. Batch query is supported.

Online Foreigner Permanent Residence ID Card Number Generator

The online tool for generating permanent residence ID card numbers in China for foreigners can generate 18 new versions of permanent residence ID card numbers online. It supports user-defined countries, accepting provinces, birth dates and other parameters. The generated results can be downloaded locally.

Full and Half Width Characters Converter Online

Online full width and half width conversion tool, which converts punctuation, English letters, numbers, and other characters in input text to each other in full width and half width. The converted results support copying and downloading.

Greatest Common Divisor and Least Common Multiple Calculator

Online greatest common divisor - least common multiple calculator, input a set of integers of any size, calculate their least common multiple and greatest common divisor.

GIF Merge Online

Online GIF merging tool, open multiple GIF images and merge them into one GIF image. Merge supports sequential and simultaneous play of GIF, and supports setting GIF image size and other parameters.

GIF Splitter Online

Online GIF splitting tool, open the GIF image, split each frame of the GIF image into images, and support the generation of images in jpeg, png, gif and webp formats. Split images support both single and batch downloads.

Batch Unit Conversion Online

Online batch unit conversion tool, input a set of data for batch unit conversion. Support batch conversion of multiple units such as length, capacity, quality, area, data, time, temperature, speed, etc.

Batch Modify Image Size Online

Online batch image size modification tool, supporting batch opening of JPEG, JPG, PNG, GIF and webP images, batch modifying the size of images, and downloading the modified images locally.

Day Calculator

The online day of the year calculator calculates the date of the day and week of the year. Calculate the day and week of the calculation.