Image to JPEG Converter
Convert PNG, WebP or any image to JPEG in your browser with a quality slider. Nothing is uploaded.
Pure browser JavaScript (HTML canvas) — no upload.
How to use this tool
- Choose any image.
- Adjust quality if needed.
- Click Download JPEG.
Convert PNG, WebP or any image to JPEG in your browser with a quality slider. Nothing is uploaded.
How it works
The Image to JPEG Converter converts images from any common format (PNG, WebP, BMP, GIF, and others) to the widely compatible JPEG format. Select your image, adjust the quality slider if you want to control the output file size, and download the .jpg file.
JPEG is the most universally supported raster image format, compatible with every operating system, browser, image viewer, email client, and document application. Converting to JPEG is useful when you need to share an image with maximum compatibility, reduce file size compared to PNG, or meet an upload requirement that only accepts JPEG.
The conversion happens in your browser -- no data is uploaded. The quality slider ranges from 1 (smallest file, lowest quality) to 100 (largest file, highest quality). A value of 85 is a good default that balances quality and size for most photos.
Be aware that JPEG does not support transparency. Any transparent areas in your source image (from a PNG with alpha channel) will be filled with a solid white background in the JPEG output.
Worked example
Convert a WebP photo to JPEG for email attachment
- Select the .webp file you downloaded from a website.
- Set quality to 85%.
- Click Convert.
- Download the .jpg file.
- Attach the JPEG to your email -- it will open correctly in any email client.
A JPEG version of the image with high quality and broad compatibility.
Common mistakes to avoid
- Expecting transparent backgrounds to be preserved -- JPEG has no alpha channel, so transparency is always replaced with a solid color (white by default).
- Re-saving an already compressed JPEG to JPEG again at a lower quality, which stacks compression artifacts and degrades the image permanently.
- Setting quality to 100% and being surprised the file is much larger than the original PNG -- JPEG at 100% quality is not lossless and is often larger than a well-compressed PNG for the same image.
Key terms
- JPEG
- A lossy image format optimized for photographs; widely supported but does not support transparency.
- Quality factor
- A value from 1 to 100 controlling JPEG compression strength; higher values preserve more detail at the cost of a larger file.
- White fill (alpha to white)
- The process of replacing transparent pixels with a white background when converting to JPEG, which does not support transparency.
Frequently asked questions
- Will transparent areas survive?
- Transparent pixels are filled white before JPEG encoding (JPEG has no alpha channel).