URL Encoder

Purpose & User Intent: This tool provides precise web text encoding and decoding to ensure data integrity when transmitting via URLs, query strings, forms, and HTML contexts. Target users include developers, API engineers, content editors, QA analysts, and security teams who need predictable transformations that preserve meaning and avoid malformed data. It enforces standards-based encoding rules across common web-use cases.
Core Logic & Features: The tool supports multiple modes (URL encoding, URL component encoding, HTML entities) with required features and optional/advanced capabilities such as batch processing, custom character-set preferences, and configuration for plus-to-space handling. Inputs & Outputs: Inputs include text (string) and mode (enum: url, url_component, html). Optional inputs include character set and length limit. Outputs provide encoded or decoded text and length metadata. Algorithms & Calculations: Implements percent-encoding per RFC 3986, mapping reserved characters to %XX forms, decodes %XX sequences back to characters, and ensures reversible transformations. Error & Edge Cases: Handles invalid sequences, incomplete percent-encodings, unsupported characters, and oversized inputs with deterministic error signaling. Industry/Region & Localization: Aligns with RFC 3986 for URL encoding, HTML5 rules for entities, and localizable terminology; supports English-speaking development teams and internationalized inputs subject to Unicode. Assumptions & Exclusions: Not an encryption tool; does not alter data semantics; excludes UI behavior or pipeline orchestration beyond encoding operations.