The PNG format is renowned for its support of lossless storage and transparent backgrounds, making it ideal for icons and line drawings. However, its file size is usually large. The JPEG format, through lossy compression, can store colorful photos with very small file sizes. Converting PNG to JPEG primarily aims to significantly reduce file size, improving webpage loading speed or facilitating email transmission. This tool completes the conversion directly on your device, ensuring the process is fast and private.
This tool works best in the following scenarios:
• Converting large PNG format photos or screenshots to smaller JPEG files for sharing.
• During web development, converting decorative images from PNG to JPEG to enhance loading performance.
• When the target platform does not support or poorly displays PNG transparent backgrounds, converting them to JPEG images with a black background.
Rest assured, all conversions are performed locally, and your image data never leaves your computer.
Your original PNG supports lossless storage, but converting to JPEG introduces compression. Setting the quality slider is key:
• Above 90%: Almost no visible quality loss, suitable for scenarios demanding high image quality.
• 80-90%: High quality, the best balance for web images and daily sharing.
• 70-80%: Standard quality, significantly reducing file size, suitable for blog post images.
• Below 70%: Noticeable compression artifacts, only used when extremely small file size is desired.
You can preview the compression effect in real-time on the interface, easily finding the ideal balance.
If you need to process multiple PNG files at once:
• First, test with a representative image to determine the best quality setting.
• If the PNG images to be processed are similar in content (e.g., all screenshots), you can confidently use a uniform quality setting.
• After conversion, check if the total file size meets your needs.
Thanks to local processing technology, even batch converting a large number of files does not require waiting for a lengthy transfer process.
All computations occur within your browser, performance depends on your device:
• Particularly large PNG files (e.g., ultra-high-resolution screenshots) may require longer processing times.
• When running conversions, closing other unnecessary applications or browser tabs can free up more system resources.
• It is recommended to use the latest versions of Chrome or Edge browsers for optimal performance.
• When processing a large number of files, keep the current page active.
Q: Why did my image's transparent background disappear after conversion?
A: This is normal. The JPEG format itself does not support transparency channels; all transparent areas are converted to a black background by default.
Q: Where is my PNG image sent?
A: Absolutely nowhere. Our tool runs 100% in your browser. Your PNG files remain on your device at all times; we cannot and do not intend to access any of your files.
Q: The converted image feels a bit blurry?
A: JPEG is a lossy compression format. If it feels blurry, try adjusting the quality slider to 85% or above to retain more image details.
Q: Is this PNG to JPEG tool free?
A: Yes. All tools on LocallyTools require no registration, no payment, and you can use them with confidence anytime, anywhere.