📂 Batch Upload Rule
For multi-file uploads, all files in the same batch should use the same source type (for example all JPG or all MP3).
JPG (Joint Photographic Experts Group) is a compressed photo format. PNG (Portable Network Graphics) is a lossless image format with transparency support. Explore our Universal Converter to convert other file types.
Quick rules and tips to get the best results.
For multi-file uploads, all files in the same batch should use the same source type (for example all JPG or all MP3).
Set your preferred output quality to balance file size and clarity. Compression behavior is tailored to each file format.
Each conversion request supports up to 200 MB total. Each user can upload a total of 500 MB per hour.
Completed jobs are saved on this device for up to 1 hour, unless you remove them from the list.
Converting JPG to PNG creates raster image output designed for quick download and broad app support. The quality slider is mapped to PNG compress_level (higher quality means lighter compression). This gives you predictable size-versus-clarity control without exposing advanced encoder flags in the UI.
When converting JPG to PNG, images are normalized with EXIF orientation handling before encoding. This keeps rotation and orientation behavior consistent across uploads from phones, cameras, and desktop exports.
The quality slider is mapped to PNG compress_level (higher quality means lighter compression). PNG uses mostly lossless compression with larger but cleaner output, so lower quality values can reduce file size more aggressively while higher values usually keep more visual detail.
For PDF-to-image routes, page rasterization is handled at a fixed internal DPI for consistent rendering. The quality slider then automatically tunes compression on the exported image, balancing visual detail and file size without extra setup.
PNG can keep transparency when the source includes an alpha channel. PNG files are broadly supported across modern browsers, messaging apps, and desktop editors, which helps when you need quick previews and predictable sharing behavior.