Choose a format for where the image will go
Converting changes the way an image is encoded. Use this tool when a website accepts JPG instead of WebP, a logo needs transparency, or you want to compare formats for a page. It exports PNG, JPG, or WebP using your browser, keeping the source pixel dimensions.
Conversion is not the same as resizing or background removal. A new format does not recover lost detail, turn a white background transparent, or guarantee a smaller file. Start with the best original available and check the destination's accepted formats before converting.
A practical format chooser
A photograph for an upload form
Choose JPG if the form accepts it and you do not need transparency. Inspect fine detail after export. Use the form’s actual requirements rather than assuming all websites accept the same files.
A logo with a transparent background
Choose PNG when you need lossless raster encoding and transparency. WebP is another option when the destination accepts it, but inspect edges and lettering after conversion.
A screenshot with small text
Try PNG first. JPEG can introduce artifacts around high-contrast edges. A text-heavy PNG can also be smaller than a JPEG, so compare actual outputs.
An image for a website you control
Compare WebP with the existing format at an acceptable visual quality. Check the whole publishing workflow, including the content-management system, rather than assuming the smallest file will work everywhere.
A master file for future editing
Keep the original. A PNG copy avoids additional lossy encoding, but this browser conversion is not an archival workflow and should not be relied on to preserve every metadata field or color profile.
JPG and JPEG are names for the same image format. WebP supports both lossy and lossless encoding, but this tool exposes a browser quality slider rather than a dedicated lossless-WebP mode.
What happens to a transparent background?
A transparent pixel lets the background behind it show through. PNG and WebP support transparency; JPEG does not. Switch the diagram below to see why a transparent logo can acquire a white rectangle when exported as JPG.
Original diagram illustrating transparency only, not an encoded output or a quality comparison. Choosing a format here does not change the converter above.
Choosing PNG for a JPEG does not remove its white background: those white pixels are already part of the image. This converter has no background-removal control. If you need a different solid background when flattening a logo, composite it in an editor first; JPEG export here uses white.
Worked example: convert a PNG to JPG
Suppose you have a 1200 × 800 PNG photograph and an upload form accepts only JPG. You need a format change, not necessarily a dimension change.
- Choose the PNG. Confirm that the source preview and displayed dimensions match the image you intended to use.
- Select JPG under “Convert to.” The quality slider appears for JPG and WebP. PNG has no lossy-quality slider.
- Start at 90% quality. This is a starting point, not a guarantee of unchanged appearance. Lower it only if the downloaded size and visual result justify the tradeoff.
- Convert and download. The tool creates a new JPG. In this example its dimensions remain 1200 × 800; the byte size depends on the content and encoder.
- Inspect the downloaded file. Check fine detail, edges, background color, dimensions, and the actual size before uploading it.
If the form also requires a maximum width, use the Image Resizer. If it imposes a tight byte limit, the Image Compressor provides an output-size estimate as you adjust JPEG quality. Avoid repeatedly converting an already degraded copy; keep the original for new attempts.
Why renaming a file is not conversion
Changing “picture.png” to “picture.jpg” changes its name, not the encoded image data. Some apps inspect the contents and still recognize PNG; others reject the mismatch. Real conversion decodes the original and writes a new file in the chosen format.
This converter uses browser canvas encoding. PNG export is lossless for the rendered pixels, while JPG and the quality-controlled WebP path can discard detail. Saving a previously compressed JPEG as PNG preserves its existing artifacts rather than reconstructing the original scene.
Compare the result, not just the extension
A photograph stored as PNG may become much smaller as JPEG, but a simple logo or screenshot can go the other way. Converting JPEG to PNG often produces a larger file because it stores the decoded pixels without JPEG's lossy compression. Neither outcome is guaranteed for every image.
For a fair comparison, keep the same pixel dimensions and inspect both images at the intended display size and at full size. Look at small text, smooth gradients, fine textures, and translucent edges. Quality percentages are encoder settings, not percentages of detail retained, and different browsers can produce different results.