AES is the most widely used symmetric encryption algorithm, supporting 128/192/256-bit key lengths. TudoSi Tools' AES encryption tool supports multiple modes (ECB, CBC, CFB, OFB, CTR, GCM) and padding methods, providing an intuitive encryption/decryption interface.

SHA family hash algorithms are used for data integrity verification and digital signatures. Supports SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3 and other algorithms. Can calculate hash for text or upload files directly.

MD5 is a classic message digest algorithm that generates 128-bit hash values. Although collision issues exist, it is still widely used in file verification and data identification scenarios. Supports MD5 calculation for text and files, quickly verifying file integrity.

Base64 is an encoding method that converts binary data to ASCII strings, commonly used for URL parameter transmission, data storage, and email transmission. Supports standard Base64, URL-safe Base64, and Base32 encoding formats.

URL encoding converts special characters to %XX format to ensure URLs work correctly during transmission. Supports encoding and decoding, can handle complete URLs or individual parameters, supports UTF-8 and GBK encoding.

JSON formatter can convert compressed JSON strings into readable format, supporting formatting, compression, validation, and editing functions. Provides syntax highlighting and error prompts, essential for handling API responses and configuration files.

Regex tester supports real-time matching, syntax highlighting, and detailed match result display. Provides common regex templates (email, phone number, URL, etc.), supports JavaScript and Python regex syntax, helping developers quickly verify and debug regular expressions.

Chinese converter supports conversion between simplified and traditional Chinese, using OpenCC conversion engine for accurate and reliable results. Supports text input and file conversion, a practical tool for handling cross-strait documents.

Pinyin converter can convert Chinese characters to pinyin, supporting tone marks and multiple output formats. Can be used for generating pinyin indexes, search keywords, etc., with multi-tone character recognition support.

Timestamp converter supports mutual conversion between Unix timestamps and human-readable dates, supporting second-level and millisecond-level timestamps, with timezone switching capability. Essential for debugging logs and API responses.

Random generator supports generating integers, decimals, random strings, random colors, and random passwords. Customizable range and length, uses cryptographically secure random source, ideal for test data generation and security scenarios.

UUID generator supports generating UUID v1, v3, v4, and v5 versions, suitable for database primary keys, distributed system identification, etc. Supports batch generation and multiple output formats, easy to copy.

QR Code generator supports creating QR Codes with customizable size, color, and error correction levels. Supports text, URL, WiFi, business card, and other data formats. Generated QR codes can be downloaded or copied directly.

QR Code decoder can identify QR codes in images and extract data. Supports image upload or camera scanning, fast decoding speed, supports multiple QR code formats.

PDF encryption tool can set password protection for PDF files, supporting user passwords and owner passwords, with restrictions on printing, copying, and editing permissions. All operations completed in the browser, files never uploaded to servers.

PDF splitter can split a PDF file into multiple files by page numbers, supporting custom split ranges and output formats. Simple and intuitive operation, supports batch processing of multiple files.