FREEFILEKIT FILE GUIDE
JPG, PNG or WebP: which image format should you choose?
The right format depends on what must survive the conversion. A photograph for an attachment, a transparent logo and a website illustration have different needs. Keep your original and choose a format for the new copy.
| Format | Useful for | What to watch |
|---|---|---|
| JPG / JPEG | Photos and broad compatibility | Lossy encoding; transparent areas become white in this toolkit. |
| PNG | Transparency, screenshots and lossless pixel encoding | Photographs can become much larger. Previously lost detail is not restored. |
| WebP | Compact web images with transparency | Check that the destination accepts WebP. FreeFileKit uses adjustable-quality encoding. |
For photos, compare JPG and WebP
Use Image Converter to export a copy. Start with the default high-quality setting and compare fine detail, text and color transitions. Use Image Compressor if the file is still too large. Reducing dimensions removes pixels, so choose an edge size that matches how the image will be displayed.
For transparent artwork, keep an alpha-capable format
PNG to WebP can retain transparent pixels while changing the encoding. PNG to JPG fills those regions with white. Choose PNG or WebP when the image must sit on different background colors.
Changing the extension is not conversion
Renaming photo.webp to photo.jpg leaves the encoded data unchanged. A converter decodes the input and creates a new file in the selected format. Similarly, JPG to PNG uses lossless encoding for the new copy, but it cannot restore detail that JPEG compression has already removed.
Batch conversion and metadata
The image tools accept up to 50 still images, 100 MiB each and 300 MiB combined, with a 40-megapixel limit per image. HEIC/HEIF uses the primary photo; animated PNG and WebP are not supported. Original metadata is excluded unless you select “Keep metadata”. GPS requires its own separate option. Review the downloaded image before sharing it.
For format characteristics and browser support, see the MDN image-format guide.