JPEG Editor

Purpose & User Intent: The tool provides in-browser JPEG editing to solve the need for fast, in-browser image adjustments without desktop software. Target users include content creators, marketers, photographers, and web designers who require quick edits for web, social, or print. Use cases include preparing product photos for a site, resizing for social media, cropping for thumbnails, and reducing file size for faster page loads. Core Logic & Features: It accepts a JPEG input and outputs a new JPEG after edits. Required features include image upload, crop, resize, rotate, and quality compression. Optional enhancements cover brightness, contrast, saturation, and sharpness; metadata handling is optional. Validation enforces JPEG input, positive dimensions, and quality range 1–100. Advanced batch processing or metadata preservation may be added later but is not guaranteed. Inputs & Outputs: Inputs are file (type image/jpeg, required), crop (x, y, w, h in px, optional), resize (width, height in px, optional), rotate (degrees, optional), brightness/contrast/saturation (percent, -100 to 100, optional), quality (1–100, optional). Outputs include edited_file (type image/jpeg, with final width, height, orientation) and optional metadata (JSON) including achieved quality and dimensions. Algorithms & Calculations: Cropping uses axis-aligned bounding; resizing uses interpolation (bicubic or bilinear); color adjustments apply per-channel linear transforms in sRGB; rotation uses affine transformation; JPEG encoding applies standard quantization at the chosen quality. Error & Edge Cases: Non JPEG input yields an error; missing file or parameters result in input error; out of range values are clamped; very large images may trigger memory or processing time limits; incompatible transformations are rejected gracefully. Industry/Region & Localization: Uses px units and sRGB color space; no regional currency handling; content is locale-neutral; adheres to general digital image standards used in web and print. Assumptions & Exclusions: The tool performs local browser processing; it does not access remote storage by default; it does not support non JPEG formats or multi-page documents; it does not provide in-app drawing, branding, or text overlay.