Help & Reference
Complete guide to all Image Lab features
Getting Started
Image Lab is a powerful browser-based image editor. Here's how to get started:
1. Open an Image
Click "Open", drag & drop, or paste with Ctrl+V.
2. Edit Your Image
Use tabs to access Basic, Adjust, Filters, and Advanced tools.
3. Export
Choose format and quality, then Download or Copy to clipboard.
4. History
Every change is tracked. Restore any previous state anytime.
Supported Formats
| Format | Import | Export | Notes |
|---|---|---|---|
| PNG | ✓ | ✓ | Lossless, supports transparency |
| JPEG | ✓ | ✓ | Lossy compression, no transparency |
| WebP | ✓ | ✓ | Modern format, good compression |
| GIF | ✓ | ✓ | Animated support with special tools |
| BMP | ✓ | ✓ | Uncompressed bitmap |
| TIFF | ✓ | ✓ | High quality, larger files |
Basic Tools
Crop
Interactive cropping with drag handles. Click Apply when done.
Flip
Mirror horizontally (H) or vertically (V).
Rotate
Quick ±90° buttons or custom angle input.
Resize
Change dimensions with various interpolation methods:
- Lanczos: Highest quality, best for photos
- Bicubic: Good quality, smooth gradients
- Bilinear: Fast, decent quality
- Nearest: Preserves hard edges (pixel art)
Adjust Tools
Brightness
Multiply pixel values. 100% = no change.
Contrast
Adjust difference between light and dark areas.
Saturation
Color intensity. 0% = grayscale.
Gamma
Non-linear brightness. <1 brightens, >1 darkens midtones.
Temperature
Warm (positive) or cool (negative) color shift.
Auto Enhance
Automatic contrast optimization.
Filters
Grayscale
Convert to black and white.
Sepia
Warm vintage tones.
Invert
Create a negative image.
Sharpen
Enhance edges and details.
Edges
Sobel edge detection.
Emboss
3D relief effect.
Gaussian Blur
Smooth blur with radius control.
Median
Noise reduction, preserves edges.
Posterize
Reduce color depth.
Pixelate
Blocky pixel effect.
Advanced Tools
Histogram Equalization
Spread intensities for better contrast.
Background Removal (Simple)
Remove solid backgrounds by color tolerance.
Vignette
Darken corners for focus effect.
Border
Add solid color border.
Watermark
Add text overlay with position and opacity controls.
Seam Carving
Content-aware resize that preserves important features.
GIF Tools
- Resize GIF: Scale while preserving frames and timing
- Trim Frames: Remove frames from start/end
- Speed: Adjust playback speed (0.5x to 4x)
- Reverse: Play backwards
Shortcuts
| Shortcut | Action |
|---|---|
| Ctrl+V | Paste image from clipboard |
| Drop file | Open dropped image |
| Click canvas | Open file picker |
Technical Info
Backend: Python/Flask with Pillow
Seam Carving: seam-carving