| Key features | - Hardware-accurate console palettes (NES, SNES, PC-98, Game Boy Advance, Mega Drive)
- Adaptive dithering algorithms (Bayer, Floyd-Steinberg, blue-noise)
- Real-time preview during customization
- Game style presets (NES, GameBoy, SNES, Minecraft, Stardew Valley)
- Color palette reduction (2, 4, 16, 256 colors or original)
- CRT effects (scanlines, CRT masks, bloom)
- Adjustable pixel size and aspect ratio
- Alpha transparency and threshold controls
- PNG export for easy download and sharing
- Edge-aware downscaling to preserve silhouettes
| - Image Compressor: shrink JPG, PNG and WebP files by quality or exact target size
- Image Resizer: set exact dimensions, scale by percentage or fit inside a bounding box
- Image Cropper: crop freely or to fixed ratio, rotate, straighten, flip
- Image Converter: convert between JPG, PNG, WebP and AVIF with quality control
- Batch Image Tools: apply resize, compression, conversion and watermarks across dozens of images
- QR Code Generator: create QR codes for links, Wi-Fi, contacts, payments with custom colours and logos
- Barcode Generator: generate EAN-13, UPC-A, Code 128, Code 39, ITF-14 with validation
- OCR Text Extractor: pull text from screenshots, scans and photos in 60+ languages
- Passport Photo Maker: produce photos at exact millimetre size and DPI on printable paper
- Image to PDF: combine images into a single PDF with page size and margin control
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| What makes it different | - Hardware palettes measured from actual retro devices rather than generic approximations
- Privacy-first processing with no server-side persistence of uploaded images
- Inline educational notes explaining art history and technical controls
- Edge detection to preserve portrait and sprite readability after quantization
- Completely free with no registration or hidden costs
| - All processing happens locally in your browser with no file uploads to any server
- No account, signup, login or email collection required
- Multiple operations combined in one pass without quality loss
- Real controls for exact specifications like file size, dimensions and print resolution
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ImageDoctor