Photo to KB · Image and PDF guides

Convert WebP, JPG and PNG: choose a format and keep transparency

Start with the formats accepted by your destination. After conversion, check the background, file size and pixel dimensions together.

Features checked ·

JPG turns transparent areas white. PNG and WebP can keep transparency. The tool starts with a 500KB target, so check the size settings after choosing your photos.

Which output format should you choose?

If your destination accepts only JPG, choose JPG. For a transparent logo or product image, choose PNG or WebP and first check whether your destination accepts it.

  • JPG: fills transparent areas with white and uses quality adjustment.
  • WebP: keeps transparency and uses quality adjustment. This tool supports still images only.
  • PNG: keeps transparency. Some photos may produce larger files than JPG or WebP.

Converting JPG to PNG cannot recover lost detail or remove the background.

How to convert WebP to JPG

  1. Open the image format converter and choose ‘Start converting to JPG’.
  2. Select a photo, or switch to multiple photos using the control beside the photo selection heading.
  3. Check that the output is JPG and set a KB limit that matches your requirements. The default is 500KB.
  4. If needed, set a width or height in pixels. Cropping and rotation are also available in single-photo mode.
  5. Run compression, check the resulting format and dimensions, then download.

A transparent WebP gets a white background when saved as JPG. Check both the result preview and the saved file.

Convert JPG or PNG to WebP, or WebP to PNG

Choose ‘Start converting to WebP’ or ‘Start converting to PNG’ on the same entry page. The output format is selected for you. Choose your photos, check the KB and dimension settings, then run the tool.

To keep a transparent background from PNG or WebP, choose PNG or WebP as the output. If your browser cannot save WebP, the tool shows an error; choose JPG or PNG instead.

WebP does not always produce a smaller file. Results depend on image content and settings, so compare the actual outputs.

Why both KB and pixels matter

KB measures file size; pixels describe image width and height. This tool applies a KB limit as well as converting the format. In automatic size mode, dimensions may shrink to meet that limit.

Setting a width or height keeps the aspect ratio and does not enlarge the source. If the tool cannot meet the KB limit at your fixed dimensions, it asks you to adjust the settings. Increase the KB limit or reduce the pixel dimension and try again.

Re-encoding JPG or WebP can affect image quality. Start again from your saved original instead of repeatedly converting a small output. The original file is not modified.

Convert multiple photos and reuse settings

Multiple-photo mode applies the same KB limit, dimensions and format to up to 10 photos. Download completed results individually or together as a ZIP. Failed photos are not included in the ZIP.

Store combinations you use often in ‘Saved settings’ below photo selection. Settings stay in the current browser; the photos themselves and crop or rotation edits are not saved there.

Supported inputs and download checks

Supports JPG, JPEG and still PNG, WebP and single-photo HEIC. Up to 10 files, 20MB (20,000,000 bytes) and 24MP per file, 100MB total. APNG, animated WebP, GIF, HEIC sequences, multi-photo HEIC and PDF are unsupported. Large photos may exceed device memory. HEIC supports files containing one still photo. Auto output is JPG; PNG and WebP are also available. The decoder loads on your first HEIC selection, which may take a moment. HDR and camera metadata are not retained; check the result’s colors and orientation.

Files are processed in your browser without a server upload. Reopen the downloaded file to check its orientation, background and dimensions. If a mobile browser opens the photo in a new view, use that view’s save menu.

See the image upload checklist and the batch processing and saved settings guide for related steps.

Related guides