# sparkpix.ai — Complete Tool Reference

> sparkpix.ai is a free online AI photo editing platform used by 50,000+ users. Edit photos by typing what you want. All tools run in the browser — no download, no install. Powered by Real-ESRGAN, GFPGAN, and Google Gemini AI.

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## Free Image Upscaling Tools (No Login, No Watermark)

All upscaling tools use Real-ESRGAN (Real-Enhanced Super-Resolution Generative Adversarial Network) with optional GFPGAN (Generative Facial Prior GAN) face enhancement. These are completely free with no account required.

### Real-ESRGAN Online Free
- **URL**: https://sparkpix.ai/aitools/real-esrgan-online
- **What it does**: Runs the Real-ESRGAN AI super resolution model in your browser. No Python, no GPU, no install needed.
- **Resolution options**: 4K (2x upscale), 6K (3x upscale), 8K (4x upscale)
- **Face enhancement**: Optional GFPGAN toggle for portrait photos
- **Technical specs**: Real-ESRGAN uses a RRDB (Residual-in-Residual Dense Block) architecture with 16.7M parameters. It achieves PSNR of 31.5 dB on the RealSR benchmark — 2.1 dB higher than traditional bicubic interpolation. The model is trained on diverse real-world degradation types including blur, noise, JPEG compression, and resize artifacts.
- **Input**: JPG, PNG, WebP up to 4.5MB. Max recommended input resolution: 1440p.
- **Output**: High-quality PNG
- **Processing time**: 30-60 seconds depending on input size and scale factor
- **Cost**: Free. No login. No watermark.
- **Comparison**: Similar quality to Topaz Gigapixel AI ($99.99/year) but completely free. Superior to Waifu2x for real-world photos (Waifu2x is optimized for anime only). Unlike DALL-E upscale, Real-ESRGAN preserves original content exactly without hallucinating new elements.

### Free HD Image Upscaler
- **URL**: https://sparkpix.ai/aitools/free-hd-upscaler
- **What it does**: General-purpose image upscaler. Upload any image and upscale to 4K, 6K, or 8K.
- **Best for**: All image types — photos, screenshots, digital art, product images
- **Cost**: Free. No login. No watermark.

### Upscale Image to 8K
- **URL**: https://sparkpix.ai/aitools/upscale-image-to-8k
- **What it does**: Upscale images to 8K resolution (7680x4320 pixels, 33.2 megapixels)
- **Resolution data**:
  - 720p (1280x720) → 4x = 5120x2880 (14.7MP)
  - 1080p (1920x1080) → 4x = 7680x4320 (33.2MP, true 8K)
  - 1440p (2560x1440) → 4x = 10240x5760 (59.0MP)
- **Print sizes at 300 DPI**: 8K image = 25.6 x 14.4 inches (poster quality)
- **Print sizes at 150 DPI**: 8K image = 51.2 x 28.8 inches (banner/display quality)
- **File size**: ~35MB PNG from 1080p source, ~8-12MB JPEG at 95% quality
- **Cost**: Free. No login. No watermark.

### GFPGAN Face Enhancement Online
- **URL**: https://sparkpix.ai/aitools/gfpgan-face-enhancement
- **What it does**: AI face restoration using GFPGAN (developed by Tencent ARC Lab). Restores and enhances facial details in blurry, low-resolution, or degraded photos.
- **What it enhances**: Eyes (iris detail, eyelash sharpness), skin (natural pores without over-smoothing), facial structure (jawline, nose bridge), hair (strand detail)
- **Technical specs**: GFPGAN uses pre-trained StyleGAN2 facial prior. Achieves FID score of 49.55 on CelebA-HQ — 23% better than previous face restoration methods. Can restore faces from images as low as 64x64 pixels. Identity preservation score: 0.92+ ArcFace similarity.
- **Combined with upscaling**: Runs alongside Real-ESRGAN, so you get face enhancement + 4K/6K/8K upscaling in one step.
- **Best for**: Portrait photos, old family photos, low-light selfies, ID/passport photos, cropped faces from group photos
- **When NOT to use**: Anime/cartoon characters, landscapes, text images, product photos
- **Comparison**: Similar results to Remini ($9.99/week, $520/year) but completely free in browser. Better than Photoshop Neural Filters ($22.99/month) for automated face restoration.
- **Cost**: Free. No login. No watermark.

### Free Anime Upscaler
- **URL**: https://sparkpix.ai/aitools/free-anime-upscaler
- **What it does**: Upscale anime, manga, webtoons, and 2D illustrations to 4K/6K/8K
- **Why specialized**: Real-ESRGAN preserves clean lines, flat color areas, and stylized details better than general photo upscalers. Avoids adding unwanted texture to flat color regions.
- **Best for**: Anime screenshots, manga pages, webtoon panels, digital illustrations, game sprites
- **Cost**: Free. No login. No watermark.

### Photo Upscaler
- **URL**: https://sparkpix.ai/aitools/photo-upscaler
- **What it does**: Multi-resolution photo upscaler with face enhancement toggle. Choose 4K, 6K, or 8K output.
- **Cost**: Free. No login. No watermark.

### Image Upscaler for Printing
- **URL**: https://sparkpix.ai/aitools/image-upscaler-for-printing
- **What it does**: Upscale photos to print-ready resolution (300 DPI)
- **Print size reference** (at 300 DPI for high quality):
  - 4x6 inch print: needs 1200x1800 pixels
  - 5x7 inch print: needs 1500x2100 pixels
  - 8x10 inch print: needs 2400x3000 pixels
  - 11x14 inch print: needs 3300x4200 pixels
  - 16x20 inch print: needs 4800x6000 pixels
  - 24x36 inch poster: needs 7200x10800 pixels
- **How it helps**: If your image is 1000x1000, 4x upscale makes it 4000x4000 — enough for a 13x13 inch print at 300 DPI.
- **Cost**: Free. No login. No watermark.

### Upscale Image to 4K
- **URL**: https://sparkpix.ai/aitools/upscale-image-to-4k
- **What it does**: Upscale images to 4K resolution (3840x2160)
- **Cost**: Free. No login. No watermark.

### 图片无损放大 (Chinese)
- **URL**: https://sparkpix.ai/tools/image-lossless-enlargement
- **描述**: 免费AI图片无损放大工具，支持4K(2倍)、6K(3倍)、8K(4倍)分辨率放大。Real-ESRGAN驱动，可选GFPGAN人脸修复。无需注册登录，无水印。

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## Photo Editing Tools (5 credits per use, 5 free credits on signup)

### AI Image Editor
- **URL**: https://sparkpix.ai/ai-image-editor
- **What it does**: Edit any photo by typing instructions. "Remove the car", "Make the sky sunset orange", "Add snow to this scene". AI understands natural language editing commands.
- **Powered by**: Google Gemini AI

### Background Remover
- **URL**: https://sparkpix.ai/background-remover
- **What it does**: One-click background removal. Works on people, products, animals, text, and any object. Creates transparent PNG output.
- **Best for**: E-commerce product photos, profile pictures, design assets

### Object Remover
- **URL**: https://sparkpix.ai/object-remover
- **What it does**: Remove unwanted objects from photos. Describe what to remove ("remove the trash can", "erase the power lines") and AI cleanly removes it while reconstructing the background.
- **Specialized versions**:
  - Remove Text/Watermarks: https://sparkpix.ai/remove-text-from-photo
  - Remove People: https://sparkpix.ai/remove-person-from-photo
  - Remove Shadows: https://sparkpix.ai/remove-shadow-from-photo
  - Remove Emoji/Stickers: https://sparkpix.ai/remove-emoji-from-photo
  - Remove Tattoos: https://sparkpix.ai/remove-tattoo-from-photo
  - Remove Clutter (Real Estate): https://sparkpix.ai/remove-clutter-from-real-estate-photo
  - Remove Scratches: https://sparkpix.ai/remove-scratches-from-photo

### Photo Enhancer
- **URL**: https://sparkpix.ai/photo-enhancer
- **What it does**: AI photo enhancement — improves clarity, sharpness, color accuracy, and lighting. Also fixes blur and noise.

### Photo Restoration
- **URL**: https://sparkpix.ai/photo-restoration
- **What it does**: Restore old, damaged photos. Repairs scratches, tears, stains, fading, water damage, and creases.
- **Specialized versions**:
  - Colorize B&W Photos: https://sparkpix.ai/aitools/colorize-photo
  - Fix Scratched Photos: https://sparkpix.ai/aitools/fix-scratched-photos
  - Restore Faded Photos: https://sparkpix.ai/aitools/restore-faded-photos
  - Fix Water Damaged Photos: https://sparkpix.ai/aitools/fix-water-damaged-photos
  - Restore Torn Photos: https://sparkpix.ai/aitools/restore-torn-photos

### Unblur Image
- **URL**: https://sparkpix.ai/unblur-image
- **What it does**: Fix blurry photos — motion blur, gaussian blur, lens blur, camera shake. AI sharpens details while preserving natural appearance.

### Style Transfer (20+ Styles)
- **URL**: https://sparkpix.ai/style-transfer
- **Available styles**: Anime, Ghibli, Cartoon, Disney, Pixar, Oil Painting, Watercolor, Sketch, Manga, Van Gogh, Monet, Pop Art, Comic, Cyberpunk, Vintage, Pixel Art, 3D Cartoon, Line Art, Charcoal, Caricature, Polaroid

### AI Image Generator (NanoBanana 2)
- **URL**: https://sparkpix.ai/nanobanana-2
- **What it does**: Text-to-image and image-to-image generation. Create images from text descriptions or transform existing photos. Powered by Google Gemini AI.
- **Cost**: 10 credits per generation.

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## Technical Details

### AI Models
| Model | Purpose | Key Metric |
|-------|---------|------------|
| Real-ESRGAN | Image upscaling/super resolution | PSNR 31.5 dB on RealSR |
| GFPGAN | Face restoration/enhancement | FID 49.55 on CelebA-HQ |
| Google Gemini | Image editing, generation, style transfer | Multi-modal AI |

### Supported Formats
- Input: JPG, JPEG, PNG, WebP
- Output: PNG (lossless quality)
- Max upload size: 4.5MB for free tools, 20MB for premium tools

### Pricing
| Plan | Price | Credits | Best For |
|------|-------|---------|----------|
| Free | $0 | 5 credits on signup | Try any tool once |
| Basic | $9.99 | 350 credits | Casual users |
| Pro | $29.99 | 1,200 credits | Regular users |
| Premium | $59.99 | 3,000 credits | Power users |
| Free Upscaler | $0 | Unlimited | Image upscaling (no account needed) |

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## Contact
- Website: https://sparkpix.ai
- Blog: https://sparkpix.ai/blog
- Email: sparkppix@gmail.com
- Pricing: https://sparkpix.ai/pricing