About Image Toolbox

Image Toolbox is a free, browser-based image processing toolkit built for photographers, designers, developers, and anyone who works with images regularly. Unlike most online tools that require uploading your files to a remote server, Image Toolbox processes everything entirely within your browser — your images never leave your device.

Our Mission

We started Image Toolbox because we were frustrated with the trade-off between convenience and privacy. Every time we needed to quickly convert a HEIC photo from an iPhone, compress an image for a website, or resize a screenshot for social media, we had to either install desktop software or upload our personal photos to some unknown server.

We believed there had to be a better way. Modern browsers are incredibly powerful — they can decode HEIC files, encode WebP and AVIF, apply watermarks, and perform complex image manipulations, all without sending a single byte over the network. Image Toolbox harnesses these capabilities into a simple, fast interface that anyone can use.

How It Works

When you upload an image to Image Toolbox, the file is read directly by your browser using the FileReader API. All processing — format conversion, compression, cropping, resizing, watermarking — happens using the HTML5 Canvas API and WebAssembly decoders (like libheif-js for HEIC support). The processed result is generated as a Blob that you can download directly.

At no point does your image data get sent to a server. There is no backend, no database, and no analytics tracking your image content. This is not just a privacy policy — it's a technical guarantee built into the architecture.

Privacy by Design

Privacy isn't an afterthought for us — it's the foundation. Here's what that means in practice:

  • No uploads: Your images are processed in-browser and never transmitted over the network
  • No accounts: No registration, no login, no email collection
  • No tracking: We don't use cookies, fingerprinting, or third-party analytics on your image activity
  • No storage: Images are held in browser memory only and discarded when you close the tab
  • Open architecture: The source code is available on GitHub for anyone to audit

Supported Formats

Image Toolbox supports a wide range of image formats for both input and output:

  • Input: JPG, PNG, WebP, GIF, BMP, SVG, AVIF, ICO, TIFF, HEIC/HEIF
  • Output: JPG, PNG, WebP, AVIF, BMP, ICO, TIFF

HEIC support is powered by libheif-js, a WebAssembly build of libheif that decodes iPhone HEIC files directly in the browser. TIFF export uses a built-in encoder for maximum compatibility.

Tools Included

Image Toolbox includes seven dedicated tools, each focused on a specific task:

  • Format Converter — Convert between JPG, PNG, WebP, AVIF, BMP, ICO, and TIFF with quality control
  • Image Compressor — Reduce file size while maintaining visual quality, with batch processing support
  • Image Cropper — Crop images to any size with a visual crop box and mm dimension display
  • Watermark Tool — Add text or image watermarks with customizable opacity, position, and size
  • Resize Tool — Scale images to exact pixel dimensions while preserving aspect ratio
  • Social Media Resizer — Pre-configured templates for Instagram, TikTok, YouTube, Facebook, and more
  • Web Optimizer — Optimize images for web delivery with format-specific compression

Contact

Have questions, feedback, or found a bug? We'd love to hear from you.

Legal

Image Toolbox is provided as-is for educational and practical use. See our Privacy Policy for details on data handling. We comply with GDPR and do not collect, store, or process any personal data through this service.