Batch File Convert
Convert a folder of images to JPEG, PNG or WebP in one pass and download a zip.
Files & batch Client-side Multiple encoders
Tool preview
How to use it
- 01
Drop the images.
- 02
Pick the output format and quality.
- 03
Convert all.
Limitations
- ! Transparency is lost when converting to JPEG.
- ! WebP output depends on browser encoder support.
FAQ
Does it resize as well?
No, dimensions are kept; use the resize tool first if needed.
Can I convert 500 files at once?
Technically yes, but memory and time grow linearly; a few dozen is comfortable.
Are files uploaded?
No.
Files never leave your device
Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.
Technical details
- Processing
- Client-side
- Implementation
- Multiple encoders
- Category
- Files & batch
- Network requests
- None while processing