ResizeImages.online

How We Process Images — 100% Client-Side Privacy

A transparent technical explanation of how ResizeImages.online processes images entirely inside your browser memory with zero server uploads.

Zero Server Transmission Guarantee

When you select or drop an image on ResizeImages.online, the file is read directly into your device's local memory (RAM) using the HTML5 FileReader API. The file is never sent to our backend servers.

Technology Stack Behind In-Browser Editing

  • HTML5 Canvas API & OffscreenCanvas: Used for pixel-perfect resampling, bilinear interpolation scaling, and crop operations.
  • WebAssembly (WASM): Powers high-performance format codecs and client-side compression calculations.
  • In-Memory Blob URL Generation: Exported files are created as local browser blob streams, enabling instant downloads without cloud round-trips.