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logo Online Tools

375 online tools , 45171256 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.

Countdown Timer Online

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

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.

Shelf Life Calculator Online

Shelf-life calculator online, input the production date, shelf-life duration, calculate the expiration time of the shelf-life of commodities, food, drugs and other items, and whether it expires.

Handwritten Signature Online

Online electronic signature tool, supporting the generation of handwritten electronic signatures, supporting personalized settings such as font color and line thickness control through custom parameters. Handwritten signatures can be downloaded as images in png, jpeg, and svg formats.

Random Phone Number Generator Online

Online random phone number generator, using template syntax to randomly generate phone numbers. This tool supports generating mobile phone numbers in any format.

Toggle String Case

Character case conversion tool, including character uppercase to lowercase, lowercase to uppercase and case inversion functions.

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.

HTTP Basic Authentication Encrypt and Decrypt Online

Online HTTP Basic Authentication encryption and decryption tool, input user name and password, and generate basic authentication encryption request header. Enter the basic authentication encryption string to decrypt the user name and password.

IPv6 Address Compress and Expand

Online IPv6 address compress and expand tool that supports the compression and expansion of 0 in IPv6 addresses.

Keyboard Event Information Online

Online keyboard key information tool, displaying key, code, keycode, location, modifiers and other key information of keyboard key events in web pages, and providing a key information query comparison table.

Latest Online

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.

SCrypt Derive Key and Verify Online

Online SCrypt derived key and verification tool, using scrypt Password Based Key Derivation Function to derive keys based on password and random salt, supporting custom block size, CPU/memory cost, parallelization, derived key length and other parameters. Support online verification of SCrypt derived keys.

Chinese Idiom Fill Online

Online chinese idiom fill in the blank tool, fill in the text of chinese idioms at any position, and search for chinese idioms. Support filling in one or more words.

HKDF Derive Key and Verify Online

Online HKDF derived key and verification tool, using the HMAC-based Extract-and-Expand Key Derivation Function algorithm, derives keys based on the input key and random salt, supports custom hash functions, derived key length, carried information and other parameters. Support online verification of HKDF derived keys.

PBKDF2 Derive Key and Verify Online

Online PBKDF2 derived key and verification tool, using Password Based Key Derivation Function 2 to export keys based on passwords and random salt, supporting custom hash functions, derived key length, iteration times and other parameters. Support online verification of PBKDF2 derived keys.