JPEG Compressor

How do I convert PNG to JPEG?

Upload your PNG file and it is automatically converted to JPEG. Note that transparency will be replaced with a white background, as JPEG does not support transparency.

What is the best JPEG quality for photos?

80-85% for general use, 90% for professional work, 70% for web thumbnails. Below 70%, compression artifacts become visible. Above 90%, file size increases significantly with little visual improvement.

Why does JPEG not support transparency?

JPEG was designed for photographs where transparency is not needed. It achieves smaller files by not storing alpha channel data. Use PNG or WebP if you need transparent backgrounds.

How do I reduce JPEG file size for email?

Compress to 70-75% quality. A typical 5MB photo becomes under 1MB. For email, resize large images to 1920px width first, then compress. Most email viewers cannot display larger images anyway.

What is JPEG compression and how does it work?

JPEG uses DCT (Discrete Cosine Transform) to remove image data the human eye cannot easily detect. Lower quality settings remove more data, creating smaller files but potentially visible artifacts.

Is JPEG or PNG better for screenshots?

PNG is better for screenshots with text, UI elements, or sharp edges. JPEG compression creates visible artifacts around text. Use JPEG only for photo-heavy screenshots.

How do I convert HEIC to JPEG on Windows?

Upload HEIC files and download as JPEG. Windows does not natively support HEIC without additional codecs. Converting to JPEG ensures universal compatibility across all devices.

Can I make a JPEG smaller without quality loss?

Minimal reduction is possible by stripping metadata (EXIF, thumbnails). For significant size reduction, some quality loss is required. At 85%+ quality, the loss is usually imperceptible.

What causes JPEG artifacts and how do I avoid them?

Artifacts appear at low quality settings, especially around sharp edges and text. Use 80%+ quality for clean results. Re-saving a JPEG multiple times compounds artifacts, so keep originals.