Tudousi Tools - Secure Online Toolset for Developers & Designers

Professional JSON processing tool providing syntax highlighting, automatic error correction, tree preview, and compression functions. Beautify messy JSON data with one click.

Accurate conversion between Unix timestamps and Beijing time/UTC time. Supports seconds and milliseconds, with real-time current timestamp display.

Real-time regex matching tool with syntax highlighting, live results, and common templates for debugging.

Visual Cron expression generator, support second, minute, hour, day, month, week, year configuration, real-time generation and explanation.

View time in major cities worldwide. Supports reverse lookup by timestamp or calculation by timezone.

Batch generate standard UUID v4, supporting uppercase, lowercase, hyphens, braces, and more customizations.

Generate high-strength random secure passwords. Customize length and characters, with built-in strength detection.

Feature-rich random number generator with integer/decimal support, custom ranges, batch generation, deduplication, sorting, and more.

Supports conversion between binary, octal, decimal, hexadecimal and any base between 2-36, using BigInt to handle large numbers.

All-in-one text formatting tool, supporting uppercase, lowercase, camelCase, snake_case, and other common naming conventions.

Supports conversion between JPG, PNG, GIF, BMP, WEBP and other formats.

Smart image compression tool that significantly reduces file size while maintaining visual quality, supporting custom quality parameters.

Professional GIF tool for splitting GIF into frames or merging images into GIF with custom delay.

Convert HEX / RGB / HSL instantly with auto detection. Copy-ready outputs for CSS, with alpha support.

Pick colors from images, calculate contrast ratios, and check WCAG accessibility compliance, all done locally.

Generate professional and harmonious color schemes, with HSL fine-tuning, color locking, and image color picking.

Efficient, secure, and customizable QR code generation solution, supporting text, URLs, and more.

Quickly identify and decode content from QR code images, supporting upload or paste for decoding.

Secure hash tool supporting 32-bit and 16-bit MD5 encryption of strings with case switching, suitable for validation and simple encryption scenarios.

Complete series of SHA secure hash calculations including SHA1, SHA256, SHA512, etc., supporting hex and Base64 format output.

SM2 asymmetric encryption algorithm, supporting key pair generation, encryption, decryption, signature and verification.

SM3 message digest algorithm, the Chinese version of SHA-256, used for digital signatures and data integrity.

SM4 block symmetric encryption algorithm, the Chinese version of AES, supports ECB, CBC and other modes.

支持 HS256/HS384/HS512 的 JWT 工具，纯前端本地执行，用于签名生成和验证，不上传任何数据。

Advanced Encryption Standard (AES) tool, supporting multiple key lengths (128/192/256), operation modes (CBC/ECB/CFB/OFB/CTR), and padding methods.

Expert asymmetric encryption providing key pair generation (1024-4096 bit), public key encryption, and private key decryption.

Modern asymmetric encryption tool supporting ECDH key exchange, EdDSA signature, and ECIES encryption, offering higher security with shorter keys.

High-performance modern stream cipher supporting Poly1305 authentication, ideal for mobile and high-performance scenarios.

Supports NIST standard ML-KEM key encapsulation and ML-DSA signature verification, providing security for the post-quantum era.

Hash-based Message Authentication Code tool, supporting SHA1, SHA256, SHA512, etc. Commonly used for API signature verification.

High-strength key derivation tool supporting PBKDF2, Scrypt, Argon2id and more. Customize salt, iterations and output length.

Provides percent-encoding and decoding for URLs, supporting UTF-8 to ensure parameter safety and correctness.

Supports bidirectional conversion between text and Base64, and provides one-click image to Base64 DataURI function, compatible with UTF-8, suitable for developer debugging.

Professional PDF data conversion tool, supporting mutual conversion between PDF files and Base64 strings for easy transmission in text environments.

A lucky draw tool designed for company annual meetings and events. Supports Excel import, custom awards and winners, fair and secure.

All-in-one unit converter for length, weight, and data size (b/MB/GB/TB) and more. Enter once to get results for all units.

Convert numeric amounts to Chinese uppercase RMB amounts, supporting integers and decimals.

Query exchange rates and convert major currencies. Data is updated daily.