How to Use PNG to JPG
Follow these steps, then review the result and the limitations below:
- Select a valid PNG file.
- Choose a JPEG background color and a quality from 0.1 to 1.0.
- Optionally enter dimensions. One dimension preserves proportions; two set an exact rectangle.
- Click Process Image, inspect the preview, and download converted.jpg.
Practical Worked Example
A 120 × 60 PNG with a transparent right half becomes an opaque 120 × 60 JPEG. With the default background, the right half is white. Choosing blue makes that region blue instead.
Key Features & Capabilities
- Task-specific controls with labelled fields and status feedback.
- Processing uses browser APIs without a tool upload request.
- Invalid input is reported before a successful output is offered.
Flatten a transparent graphic onto a chosen background
JPEG does not support transparent pixels. Choose a background color before export so transparent areas and translucent edges are composited against that color rather than an accidental black background.
How It Works (Technical Overview)
The canvas is filled with the selected background color before the decoded PNG is drawn. The browser then exports JPEG at the selected quality.
Real-World Use Cases & Applications
- Flatten a transparent graphic onto a chosen background. Check the worked example before processing your own input.
Privacy, Security & Accuracy
Lossy JPEG encoding may blur small text and create edge artifacts. It may not be smaller than an optimized PNG. Use PNG to WebP if retaining transparency is important. Practical limits depend on browser support and available memory. Files above 20 MiB are rejected; raster processing is limited to 16 million pixels and output dimensions to 8192 pixels per side.
Pro Tips for Best Results
Check the result against your original and the requirements of the destination. Keep an unchanged source copy.
Frequently Asked Questions
Can I keep the transparent background?
No. Transparency must be flattened for JPEG. Retain the PNG or use a format that supports an alpha channel.
Is my input uploaded for processing?
The tool code works in the browser. The page can also load advertising or analytics scripts, which have separate data practices. Avoid sensitive files on an unsuitable device or page.
Related Tools
Explore complementary tools in the Image Tools suite:
- Image Compressor — Export browser-readable images as JPEG with adjustable quality and optional dimensions. Output size may vary.
- JPG to WebP — Convert a JPG or JPEG photograph to WebP with adjustable quality, optional resizing, and an output preview.
- PNG to WebP — Convert a PNG image to WebP, preserving transparency with adjustable quality and optional resizing.
- Image Resizer — Resize a static image by dimensions or percentage and export PNG. One dimension preserves the aspect ratio.