How to convert an image to another format with OnyxPDF
- Drop your images into the tool.
- Pick the target format: PNG, JPG, WebP or BMP.
- Set the quality for lossy formats.
- Click “Convert Images” and download the results.
Why do it in your browser instead of uploading?
- Batch conversion with no caps — convert a whole folder’s worth in one pass.
- Full resolution preserved; some free converters quietly shrink output dimensions.
- BMP included via a hand-written encoder — the format most web converters skip.
- No upload: convert screenshots and photos locally.
Good to know (honest limits)
- JPG and BMP have no transparency: transparent areas of a PNG are flattened onto the background — convert to PNG or WebP to keep alpha.
- WebP quality behaviour varies slightly between browsers since each uses its own encoder.
Frequently asked questions
PNG or JPG — which should I choose?
JPG for photos (much smaller, no transparency). PNG for screenshots, logos and anything needing transparency or pixel-exact quality.
What is WebP good for?
Websites: WebP is typically 25–35% smaller than JPG at similar quality and supports transparency. All modern browsers display it.
Will conversion reduce my image’s resolution?
No. Dimensions in = dimensions out; only the encoding changes.
Are my images uploaded?
No. Conversion runs entirely in your browser.