Batch Resize vs imgproxy

Batch Resize is an iOS and macOS app for changing multiple images to a chosen pixel size. Its current App Store listing says it can resize up to 500 images at once. Users can choose fixed width, fixed height, maximum pixel, aspect fill or aspect fit, then save results to Camera Roll or a custom album. Maximum output dimensions are 4000 × 4000 pixels on 32-bit devices and 8000 × 8000 pixels on 64-bit devices. The listing names English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese and Spanish. Batch Resize is free to download and contains advertising; a 34.99 USD once in-app purchase removes ads. The developer indicates usage data may be used to track users and collected for third-party advertising and analytics, though Apple says this disclosure has not been verified by Apple.

imgproxy is a self-hosted HTTP server that transforms images on demand using a source URL and processing options. It can resize, crop, trim, rotate, pad, watermark, apply filters and color adjustments, and chain processing steps. Sources include HTTP(S), local files, Amazon S3-compatible storage, Google Cloud Storage, Azure Blob Storage, and OpenStack Swift. Supported formats include JPEG, PNG, WebP, AVIF, JPEG XL, GIF, SVG, ICO, HEIC, BMP, TIFF, and animated GIF and WebP. Optimization can remove metadata and ICC profiles, quantize PNGs, and serve WebP, AVIF, or JPEG XL when a browser supports the format. imgproxy can run in Docker, Kubernetes with Helm, cloud environments, or on a local machine. Security options include signed URLs, authorization headers, source and file-size limits, dimension checks, URL expiration, and SVG sanitization. Pro adds video, PDF, and Photoshop previews, advanced compression and watermarking, object detection and cropping, automatic format selection, and priority support. The open-source version uses the MIT license. A free plan and 14-day trial are listed; Pro starts at $49 a month.