Help Guide
Learn how to use the image processing tools to quickly process your images
Feature Overview
Background Removal
Intelligently identify and remove white backgrounds from images, generating PNG images with transparent backgrounds
- • Support multiple image formats
- • Adjustable tolerance parameters
- • Real-time preview effects
- • Batch processing functionality
Image Upscaling
Use advanced interpolation algorithms to upscale images while maintaining image clarity and details
- • Multiple interpolation algorithm options
- • Custom scaling factors
- • Quality comparison preview
- • Batch upscaling processing
Background Removal Guide
Quick Start
1. Upload Image
Drag image to upload area or click to select file
2. Adjust Parameters
Choose preset or customize tolerance value
3. Real-time Preview
View processing effects and compare with original
4. Download Results
Download individually or batch download as package
Parameter Settings
Precise Mode
Tolerance: 10
Suitable for pure white backgrounds
Standard Mode
Tolerance: 30
Suitable for most situations
Loose Mode
Tolerance: 60
Suitable for off-white backgrounds
Custom Tolerance: Tolerance range 0-100. Lower values only make colors closer to pure white transparent; higher values make more off-white colors transparent.
Image Upscaling Guide
Quick Start
1. Upload Image
Select image file to be upscaled
2. Set Parameters
Choose scaling factor and interpolation algorithm
3. Preview Comparison
View comparison between original and upscaled image
4. Download Results
Download the upscaled high-resolution image
Parameter Settings
Scaling Factor
Slight upscaling
Standard upscaling
High upscaling
Ultra-high upscaling
Interpolation Algorithm
Cubic (Recommended)
Bicubic interpolation, best balance of quality and speed
Lanczos
Highest quality, suitable for important image processing
Linear
Bilinear interpolation, fast processing speed
Linear Exact
Exact bilinear interpolation, better quality
Area
Area interpolation, suitable for image downscaling
Nearest
Nearest neighbor interpolation, preserves pixel style
PDF Tools Guide
PDF Conversion
Convert PDF pages to high-quality images (PNG/JPG).
- • Select specific pages
- • Adjustable DPI quality
- • Batch download as ZIP
PDF Manipulation
Merge, split, or delete pages from your PDF documents.
- • Visual page reordering
- • Combine multiple files
- • Instant local processing
PDF Reader
View PDF files directly in your browser with no uploads.
- • Page thumbnails
- • Zoom controls
- • Private viewing
Audio & Video Tools Guide
Audio Processing
- Audio Converter: Convert between MP3, WAV, OGG, AAC, and FLAC formats.
- Audio Compressor: Reduce file size while maintaining audio quality.
- Volume Adjustment: Normalize audio levels and reduce background noise.
Video Processing
- Video Cutter: Trim video clips precisely and export to MP4.
- Video to GIF: Create animated GIFs from video segments.
- Screen Recorder: Capture your screen or camera directly from the browser.
General Features
File Support
Supported Formats
- • JPEG (.jpg, .jpeg)
- • PNG (.png)
- • WebP (.webp)
- • BMP (.bmp)
File Limitations
- • Maximum 10MB per file
- • Process up to 20 files simultaneously
- • Recommended resolution not exceeding 4K
Batch Processing
- • Multi-file Upload: Select multiple files for simultaneous processing
- • Unified Parameters: All files use the same processing parameters
- • Progress Display: Real-time display of batch processing progress
- • Batch Download: Package and download all files after processing
Privacy & Security
Local Processing
All image processing is completed in your browser, no uploads to servers
Data Security
Your image data is not stored or transmitted, automatically cleared after processing
Offline Available
Tool can be used offline after loading, no network connection required
Open Source Transparent
Built on open source technology, code is publicly transparent
Frequently Asked Questions
Why do processed images have jagged edges?
This is usually because the tolerance value is set too low. Try increasing the tolerance value or use the "Standard Mode" preset.
Why aren't some white areas made transparent?
This may be because these areas are not pure white. Try increasing the tolerance value or use the "Loose Mode" preset.
Why are upscaled images blurry?
Try using "Lanczos" or "Cubic" interpolation algorithms, which provide better image quality. Avoid excessive upscaling (more than 4x).
What to do when browser freezes while processing large files?
It's recommended to compress image size first, or close other browser tabs to free up memory. For very large images, consider batch processing.