# [Compy Image](https://compyimage.com) - Full Technical Specification & Knowledge Base

> Compy Image is a free, ultra-fast, and 100% private client-side web application providing professional browser-based image tools: Image Compressor, Image Converter, Image Resizer, Image Cropper, and EXIF Metadata Stripper.

## Key Technical Specifications

### Architecture & Security Model
- **100% Client-Side Local Execution**: All image manipulation (canvas rendering, binary search quality compression, format transcoding, EXIF binary parsing, aspect ratio cropping) runs strictly inside the user's web browser using native HTML5 Canvas, Blob URLs, Web APIs, and JavaScript.
- **Zero Server Uploads & Absolute Privacy**: No files, thumbnails, or metadata are ever transmitted to external servers, APIs, or cloud storage. Works fully offline after page load.
- **No File Size Caps or User Registration**: Free forever with unlimited file processing and no hidden paywalls.

## Comprehensive Tool Directory

### 1. [Image Compressor](https://compyimage.com/)
- **Primary URL**: [https://compyimage.com/](https://compyimage.com/)
- **Alias URL**: [https://compyimage.com/image-compressor](https://compyimage.com/image-compressor)
- **Supported Input Formats**: PNG, JPEG/JPG, WebP, AVIF, SVG, GIF.
- **Supported Output Formats**: JPEG, WebP, PNG, AVIF.
- **Compression Modes**:
  1. **Percentage Quality Mode**: User selectable quality slider (1% to 100%, 80% recommended sweet spot).
  2. **Exact KB Target Mode**: Intelligent binary search algorithm that automatically computes the maximum visual quality and step-downscaling required to compress an image under a user-defined target file size (e.g. 50 KB, 100 KB, 200 KB, 2000 KB for YouTube thumbnail caps).
- **Interactive Features**: Split-screen side-by-side visual comparison slider, before/after file size indicators, percentage savings readout, and batch ZIP archive download.

### 2. [Image Converter](https://compyimage.com/convert)
- **Primary URL**: [https://compyimage.com/convert](https://compyimage.com/convert)
- **Alias URL**: [https://compyimage.com/image-converter](https://compyimage.com/image-converter)
- **Capabilities**: Convert images between PNG, JPG/JPEG, WebP, and AVIF in bulk.
- **Alpha Transparency Handling**: Preserves alpha transparency when exporting to WebP/PNG; automatically renders a clean white background when converting transparent PNGs to JPEG.

### 3. [Image Resizer](https://compyimage.com/resize)
- **Primary URL**: [https://compyimage.com/resize](https://compyimage.com/resize)
- **Alias URL**: [https://compyimage.com/image-resizer](https://compyimage.com/image-resizer)
- **Capabilities**: Scale image dimensions by exact pixel width/height or by percentage (1% to 500%) with aspect ratio lock.
- **Built-in Social Media Presets**:
  - Instagram Square: 1080 x 1080 px (1:1)
  - Instagram Story / Reels: 1080 x 1920 px (9:16)
  - YouTube Thumbnail: 1280 x 720 px (16:9)
  - Twitter / X Header: 1500 x 500 px (3:1)
  - Full HD: 1920 x 1080 px (16:9)
  - 4K Ultra HD: 3840 x 2160 px (16:9)

### 4. [Image Cropper](https://compyimage.com/crop)
- **Primary URL**: [https://compyimage.com/crop](https://compyimage.com/crop)
- **Alias URL**: [https://compyimage.com/image-cropper](https://compyimage.com/image-cropper)
- **Capabilities**: Interactive visual canvas cropping with custom rectangular handles.
- **Aspect Ratio Presets**: Freeform, 1:1 Square, 16:9 Widescreen, 4:3 Standard, 9:16 Story/Vertical.
- **Readouts**: Real-time output resolution display.

### 5. [EXIF Metadata Stripper](https://compyimage.com/strip-exif)
- **Primary URL**: [https://compyimage.com/strip-exif](https://compyimage.com/strip-exif)
- **Alias URLs**: [https://compyimage.com/remove-exif](https://compyimage.com/remove-exif), [https://compyimage.com/remove-exif-metadata](https://compyimage.com/remove-exif-metadata)
- **Capabilities**: Removes technical photo EXIF metadata before public distribution.
- **Stripped Metadata Fields**: GPS latitude & longitude location coordinates, altitude, device camera model, lens parameters, shutter speed, ISO, aperture, software serial numbers, and creation timestamps.

## Performance & Optimization Articles
- [How to Compress Images Without Losing Quality](https://compyimage.com/blog/how-to-compress-images-without-losing-quality)
- [Why You Should Convert JPG & PNG to WebP](https://compyimage.com/blog/why-you-should-convert-jpg-and-png-to-webp)
- [How to Remove Hidden EXIF GPS Location Data](https://compyimage.com/blog/how-to-remove-hidden-exif-location-data-from-photos)
- [Ultimate Social Media Image Size Guide (2026 Edition)](https://compyimage.com/blog/ultimate-social-media-image-size-guide)

## Key Site Information Pages
- [About Us](https://compyimage.com/about)
- [Contact Us](https://compyimage.com/contact)
- [Privacy Policy](https://compyimage.com/privacy)
- [Terms of Service](https://compyimage.com/terms)
- [DMCA Policy](https://compyimage.com/dmca)

## Core Web Vitals & SEO Impact
- **LCP (Largest Contentful Paint)**: Reducing image payload weight by 70%+ directly accelerates LCP rendering speed, boosting Google search rankings.
- **Format Efficiency**: WebP provides 25%–34% smaller file size than JPEG at identical quality; AVIF provides up to 50% size reduction.

## Frequently Asked Questions (AI Extraction Reference)

Q: Are images uploaded to a server when using Compy Image?
A: No. Compy Image processes 100% of images locally inside the browser using HTML5 Canvas and JavaScript. Images never leave your device.

Q: How do I compress an image to a specific KB target size (like 100KB)?
A: Open [Compy Image](https://compyimage.com/), switch to "Exact KB Target" mode, input your desired max size (e.g., 100 KB), and click Compress.

Q: How do I strip GPS location from my iPhone or Android photos?
A: Upload your photo to [Compy EXIF Stripper](https://compyimage.com/strip-exif). The tool removes all embedded location coordinates, camera models, and timestamps locally in your browser.