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Social-Media-Bildgenerator
Erstellen Sie perfekt dimensionierte Bilder für jede Social-Media-Plattform in Sekunden
KostenlosIm BrowserKein Konto
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🌐 Runs in Browser⏱ Est. 5–20 seconds
Foto-Kolorierung
Schwarz-Weiß-Fotos mit KI-gestützter Kolorierung zum Leben erwecken
Try It Now — FreeWhat is Foto-Kolorierung?
Automatically colorize black and white photos using a deep learning model running in your browser. Upload historical photos, portraits, or any grayscale image and see them in full color within seconds.
Key Features
AI-powered automatic colorization in browser
High-resolution output up to 4K
Interactive slider to compare original and colorized
Manual color hint mode for precise control
Batch colorization of multiple photos
Download as PNG or JPEG
No data sent to server — fully private
Optimized for portraits, landscapes, and architecture
How It Works
1
Upload Photo
Drop a black and white or grayscale photo. JPEG, PNG, and WebP are supported.
2
AI Processing
A convolutional neural network analyzes the image and predicts natural colors for each region.
3
Review
Use the comparison slider to see the before and after. Add color hints if needed.
4
Download
Save the colorized image in full quality.
Who Is This For?
- →Restoring and colorizing family archive photos
- →History educators creating engaging visual materials
- →Documentary filmmakers adding color to historical footage
- →Artists and photographers exploring creative reinterpretations
Why Use Foto-Kolorierung?
Services like MyHeritage Colorize and Palette.fm produce beautiful results, but they upload your family photos to a third-party server and often require a paid subscription for high-resolution output. Zeraku's Photo Colorizer runs the AI model entirely in your browser — your personal and historical photos stay completely private. Free, unlimited, and no account required.
AI Photo Colorization: Zeraku vs Cloud Services
MyHeritage and Palette.fm upload your photos to their servers. Zeraku runs the AI model entirely in your browser — your personal and historical photos stay completely private.
| Zeraku | MyHeritage | Palette.fm | |
|---|---|---|---|
| Completely free | ✓Unlimited | △Up to 5/month | △Photo limit |
| Privacy (no photo upload) | ✓Browser-only | ✗Server upload | ✗Server upload |
| Account required | ✗Not required | ✓Required | ✓Required |
| High-res output (free) | ✓Original res kept | ✗Paid plan only | ✗Paid plan only |
| Works offline (2nd visit+) | ✓Model cached | ✗Always online | ✗Always online |
Beginner's Guide
Photo Colorizer uses artificial intelligence to automatically add colour to black-and-white photographs. It is perfect for restoring old family photos, historical images, or any greyscale picture. Simply upload the photo — the AI analyses the content of the image (sky, skin, foliage, clothing) and applies realistic colours automatically. You can download the colourised result instantly. No artistic skill or manual painting is required.
Technical Details
Uses a DeOldify-inspired convolutional neural network converted from PyTorch to ONNX format and executed via ONNX Runtime Web in a dedicated Web Worker. The model operates in the CIE LAB colour space: the greyscale input image provides the L (luminance) channel, and the network predicts the A (green–red) and B (blue–yellow) channels. The LAB output is converted to sRGB for display. Images larger than 512×512 px are tiled with 32 px overlap and the tiles are blended with a Gaussian weight mask to eliminate seams. The ONNX model is cached in the browser Cache API after the first download. No pixel data is ever sent to a server.
Frequently Asked Questions
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