JPG is a good starting point for photos, PNG for transparency or sharp graphics, and WebP for web images. First check which formats the destination accepts. A newer format is no help if the receiving system cannot open it.
Compare the three formats
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Transparent background | Not supported | Supported | Supported |
| Compression | Lossy | Lossless | Lossy or lossless |
| Typical use | Photos and application images | Logos, interfaces and screenshots | Images on websites |
| Before choosing | Check small text | Check file size | Check compatibility |
See the MDN image format guide for technical details. A format supporting lossless compression does not mean every tool offers that mode.
Convert with Convertfile.tech
- Open the image converter and choose a JPG, PNG or WebP file.
- Choose an Output format.
- For JPG or WebP, adjust Quality. This control is hidden for PNG.
- Select Convert image, check the preview and actual file size, then download.
The tool processes one image and preserves its pixel dimensions. Transparent areas become white in JPG output. It has no separate lossless WebP mode. It is intended for still images; animation is not preserved.
Why can the output be larger?
Changing format and reducing file size are different operations. A small PNG can become a larger JPG depending on its contents and the quality setting. Compare the original and output sizes before downloading.
For a specific upload limit, use the MB Reducer. It reduces quality and, when necessary, pixel dimensions to try to meet your target.
Quick examples
- If an application form only accepts JPG, choose JPG and check its size requirements separately.
- For a logo on different backgrounds, choose PNG or WebP to preserve transparency.
- For a screenshot with small text, try PNG first. Zoom in on any JPG result to check legibility.
Does converting JPG to PNG restore lost detail? No. It saves the image in another format without repairing previous losses. Keep a copy of your original.