Batch Image Converter
Convert multiple images simultaneously with single-file concurrency and progress tracking.
Drop images here
or click to browse from your device
How to Use Batch Image Converter
- 1Select multiple image files at once.
- 2Choose your target output format (JPG, PNG, or WebP).
- 3The queue processes images sequentially (concurrency 1) to protect browser memory.
- 4Download converted files individually.
Technical Specifications & Capabilities
| Input Formats | JPG, JPEG, PNG, WebP, HEIC |
|---|---|
| Output Format | Configurable (JPG, PNG, WebP) |
| Transparency Support | Preserved when outputting to PNG or WebP |
| Compression Type | Sequential Client Batch Worker Processing |
| Processing Engine | Browser Web Worker + HTML5 Canvas Queue |
| Max File Size Limit | 25 MB per file limit |
| Max Pixel Boundary | 50 Megapixels per image |
Common Use Cases
- •Converting an entire folder of iPhone HEIC photos to JPG in one operation.
- •Bulk converting website PNG graphics to WebP.
Zero Upload Privacy Architecture
PixelLocal operates entirely within your browser memory. When you select a photo, your browser decodes and processes the pixel data locally using HTML5 Canvas and WebAssembly. Your files are never transmitted over the internet, logged, or stored on remote servers.
Troubleshooting & Known Limitations
- ⚠️If one file in a batch is corrupted, the queue automatically skips to the next file without breaking the batch.
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Frequently Asked Questions
Why is batch processing done sequentially?
Processing images sequentially (concurrency 1) prevents browser RAM crashes on mobile devices while processing large image files.