Image to JPG Converter

Assumption: the most common intent is a general image file to JPG converter tool, capable of handling multiple input formats and batch processing. This specification focuses on the tool's purpose, domain logic, value, audience, and differentiators, not on UI.
Purpose & User Intent: Solves the problem of converting diverse image formats to JPEG for web, publishing, or asset pipelines. Primary users include photographers, design teams, web developers, and content managers who need reliable, lossy JPEG outputs with controllable quality. When users need standardized JPEG files from PNG, GIF, TIFF, BMP, or WebP inputs, or when batching multiple images for campaigns, this tool is appropriate.
Core Logic & Features: Required features include input file(s) in supported formats, output format set to JPEG, and a quality parameter (1–100). Optional/advanced features include resizing via max width/height, color profile handling, progressive JPEG, and metadata preservation or stripping. The tool operates by decoding inputs, applying optional resize, re-encoding as JPEG with specified quality, and exporting outputs with the same or adjusted filenames.
Inputs & Outputs: Inputs: input_files (array of files, required; accepted MIME types: image/*; sample: ["photo.png","design.tiff"]; max 20 files), output_quality (integer, 1–100, optional, default 85), max_width (integer pixels, optional), max_height (integer pixels, optional), preserve_metadata (boolean, optional). Outputs: converted_files (array of JPEG files with .jpg extension), size (bytes), mime_type (image/jpeg). Logs or error notes returned as needed for auditing.
Algorithms & Calculations: Decoding uses standard image decoders; resizing uses nearest-neighbor or bicubic by default, preserving aspect ratio. JPEG encoding uses specified quality, optionally enabling progressive mode. If preserve_metadata is true, EXIF/IPTC/XMP data may be preserved; otherwise dropped.
Error & Edge Cases: Missing inputs triggers required-input checks; invalid file types produce per-file errors without halting other files; oversized batches may be capped; if any input is corrupt, that file is skipped with an error in the output report.
Industry/Region & Localization: Outputs use JPEG standard across regions; units are pixels for dimensions and percent for quality. No currency considerations. Localization concerns include decimal separators for dimension inputs if localized; supports en-US and pt-BR locale formatting for numbers.
Assumptions & Exclusions: Assumes source images are static and not animated GIFs; does not convert vector formats directly; does not perform advanced color grading.