How to Batch Convert Images Locally and Securely
Converting images is one of the most common tasks online, but traditional cloud-based converters pose massive security risks. Learn how to convert your images locally in your browser with our Image Converter.
The Danger of Online Image Converters
Most free online image converters require uploading your files to their remote servers. Once uploaded, your images are parsed, converted on their server hardware, and stored temporarily (or permanently). For sensitive corporate graphics, private screenshots, contract PDFs converted to images, or personal photographs, this constitutes a massive security risk and possible privacy violation.
What Does "Local Conversion" Mean?
Local or client-side conversion means that the image files are read, decoded, and re-encoded directly in your browser's sandboxed memory using advanced HTML5 Canvas and WebAssembly technologies. Your images never leave your computer. No network requests are made containing your file data, meaning the conversion works even if you unplug your Wi-Fi after the page has loaded.
Benefits of Local Batch Image Processing
- 100% Privacy & Security: Your files never hit any remote servers, eliminating data leaks. Perfect for business diagrams, personal photography, and sensitive documents.
- Instant Processing Speed: Since you do not have to wait to upload files to a server and download the outputs, conversion is nearly instantaneous.
- No Bandwidth Cost: Perfect for processing large photo albums or professional design files without consuming cellular data.
- Support for iOS HEIC files: Convert modern Apple photos to web-standard PNG, JPG, or WEBP formats locally.
- Universal Formats Support: Support for 40+ extensions including Adobe Photoshop PSD/PSB, TIFF/TIF, TGA, PPM, and camera RAW outputs (CR2, CR3, NEF, ARW, DNG, etc.) by extracting full-size previews locally.
- Diverse Local Exports: Download your files in WEBP, PNG, JPG, BMP, ICO (favicon), TIFF, or package them into multi-page PDF documents.