Client-side tools: Photos stay on your device
Tools like PhotoResizer.in process images entirely in your browser. The photos are loaded into your browser's memory, processed using JavaScript, and the result is saved directly to your device. Nothing is ever sent to a server.
Server-based tools: Your photo takes a journey
- Photo is uploaded to the tool's server (usually via HTTPS).
- Server processes the image (resize, convert, etc.).
- Processed result is sent back to you.
- What happens next depends on the tool's policies — the original may be kept, deleted after hours, or used for AI training.
How to check what a tool does with your photos
- Read the Privacy Policy and Terms of Service.
- Look for mentions of "data retention", "server storage", and "third-party sharing".
- Check if the tool is GDPR compliant (GDPR guide).
- Prefer tools that explicitly state client-side processing.
Technical Verification & Standards Compliance for Digital Submissions
When uploading photographs, signatures, or official records to government portals, visa processing systems, or recruitment boards, strict automated validation scripts evaluate both visual clarity and physical file parameters. Minor errors—such as non-standard aspect ratios, improper pixel dimensions, high compression artifacts, or unstripped EXIF headers—frequently trigger instant system rejections.
Image Dimension & Aspect Ratio Math
Official forms specify exact physical measurements (e.g., 3.5cm × 4.5cm) or pixel boundaries (e.g., 350×450px). Converting physical units into digital resolution requires applying exact DPI scales: Pixels = (Millimeters / 25.4) × DPI.
Local WebBrowser Compression Engine
PhotoResizer.in uses client-side HTML5 Canvas and WebAssembly algorithms to compress image streams down to specific KB limits (10KB, 20KB, 50KB, 100KB, 200KB) entirely inside your web browser. Visual data never leaves your device.