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Change Picture Formats Between JPG, PNG and WebP

Different places accept different image formats. Older software and many upload forms only take JPG, designers need PNG for transparent logos, and websites load fastest with WebP. The PDFWix image converter turns JPG, PNG, WebP, GIF and BMP files into JPG, PNG or WebP in your browser. Choose the output, set the quality for lossy formats and convert a whole folder at once.

Change Picture Formats Between JPG, PNG and WebP

Different places accept different image formats. Older software and many upload forms only take JPG, designers need PNG for transparent logos, and websites load fastest with WebP. The PDFWix image converter turns JPG, PNG, WebP, GIF and BMP files into JPG, PNG or WebP in your browser. Choose the output, set the quality for lossy formats and convert a whole folder at once.

Why convert images with PDFWix

• Any direction: JPG, PNG and WebP to any of the three, plus GIF and BMP input.
• Transparency handled: Converting to JPG fills see-through areas with white instead of black.
• Batch conversion: Convert a whole folder of mixed formats in one pass.
• Private: Files are converted on your device, never uploaded.
• Free with no watermark: Clean files, unlimited conversions.

When to convert an image

• Turning WebP images saved from websites into JPG or PNG that open everywhere
• Converting photos to WebP to speed up a website
• Saving screenshots and logos as lossless PNG
• Meeting upload forms that only accept JPG
• Converting images before building a PDF with [JPG to PDF](https://www.pdfwix.com/jpg-to-pdf)

How to Convert Images to Another Format

1. Add images — Drop JPG, PNG, WebP, GIF or BMP files — mix formats freely.
2. Choose the output format — Pick JPG, PNG or WebP.
3. Set quality — For JPG and WebP choose a quality (92% is near-original). PNG is always lossless.
4. Convert and download — Click Convert. Files keep their names with the new extension.

Tips for converting images

• Keep logos as PNG or WebP — JPG cannot store transparency and will add a white background.
• Don't round-trip JPG — Converting JPG → PNG won't restore lost detail; it only makes the file bigger.
• Shrink after converting — Use [Compress Image](/compress-image) for tight size limits.
• iPhone photos — HEIC files are handled by [HEIC to JPG](/heic-to-jpg).

Image formats compared

Key differences between JPG, PNG and WebP.

Related tools

• WebP to PNG
• PNG to JPG
• JPG to PDF
• HEIC to JPG
• SVG to PNG
• PNG to ICO (Favicon)

Quick answer

To convert an image free: open the PDFWix Image Converter, add your files, choose JPG, PNG or WebP as the output, adjust quality if needed, and click Convert. For one-click presets use WebP to PNG, WebP to JPG, PNG to JPG or JPG to PNG.

How PDFWix Image Converter works

PDFWix Image Converter decodes each file with the browser's built-in image decoder and re-encodes it with canvas.toBlob as image/jpeg, image/png or image/webp. JPG output has transparent areas filled with white because JPEG does not support an alpha channel; PNG output is lossless; WebP supports both transparency and adjustable lossy quality. Files are converted locally and never uploaded.

JPG vs PNG vs WebP: which format should you use?

JPG is the universal photo format: every device, app and upload form opens it, and lossy compression keeps photos small — but it has no transparency and softens sharp text and line art. PNG is lossless and supports transparency, making it ideal for logos, screenshots, diagrams and anything with crisp edges, at the cost of much larger files for photos. WebP, developed by Google, does both: lossy or lossless compression, transparency, and files typically 25–35% smaller than JPG at the same visual quality. It is supported by all modern browsers, but some older software still refuses it. Rule of thumb: photos for sharing → JPG; graphics, screenshots and anything transparent → PNG; images for your own website → WebP.

At a glance

Outputs: JPG · PNG · WebP · Inputs: JPG · PNG · WebP · GIF · BMP · Processing: 100% in your browser

The bottom line

Converting iPhone photos? Use HEIC to JPG. To put images into a document, use JPG to PDF.

Frequently asked questions

Which image format is best?

JPG for sharing photos, PNG for graphics and transparency, WebP for websites where size matters.

Does converting lose quality?

Converting to PNG is lossless. JPG and WebP at 90%+ quality are visually identical to the source.

Can I convert many images at once?

Yes — add as many as you like, in mixed formats.

What happens to transparent backgrounds when converting to JPG?

They are filled with white, because JPG has no transparency.

Are my files uploaded?

No. Conversion runs in your browser.

Is the image converter free?

Yes, free with no watermark.