JPEG Compressor Online

JPEG (Joint Photographic Experts Group) is the most widely used image format on the web, optimized for photographs and complex images with smooth color gradients. It uses lossy compression, which means some image data is permanently discarded to achieve smaller file sizes. JPEG excels at compressing photos because the human eye is less sensitive to the subtle detail loss in continuous-tone images. The trade-off is that JPEG is not ideal for sharp-edged graphics, text overlays, or images with large flat-color areas — those tend to produce visible artifacts at lower quality settings.

SizeSnap compresses JPEGs using a binary search on the quality parameter (1–100). Instead of asking you to guess a quality slider position, it starts at the midpoint and iteratively adjusts up or down, re-encoding the image at each step, until the output file size lands within a tight tolerance of your target. The underlying encoder also applies optimized Huffman coding and chroma subsampling to squeeze out extra bytes without a perceptible drop in visual quality. Because the process runs server-side with the Sharp library, it handles high-resolution camera JPEGs (20+ megapixels) quickly and consistently.

• 1Start with a target around 60–70% of the original size to retain excellent visual quality while still saving meaningful space.
• 2If your JPEG came straight from a DSLR or smartphone, it may be 8–15 MB — most web use cases only need 200–500 KB, so do not be afraid to set an aggressive target.
• 3Avoid re-compressing the same JPEG multiple times. Each lossy pass introduces new artifacts, so always start from the highest-quality original you have.
• 4For images that will be displayed at a specific pixel size (e.g. 800×600 for a blog), resize before compressing — smaller dimensions dramatically reduce file size and prevent unnecessary quality loss.
• 5If edge sharpness matters more than file size (e.g. product photos with text), consider converting to PNG instead — SizeSnap supports that too.

Can I compress JPEG without losing quality?

JPEG uses lossy compression, so some data is discarded. However, SizeSnap’s smart compression minimizes visible quality loss — most users can’t tell the difference at moderate compression levels.

What’s the smallest I can compress a JPEG?

It depends on the image dimensions and content. SizeSnap can target as low as 20KB, though very small targets on high-resolution images will show visible quality loss.

Is SizeSnap better than TinyPNG for JPEG?

TinyPNG reduces file size by a percentage — you can’t control the exact output size. SizeSnap lets you specify the exact target (e.g., 200KB, 1MB), which is essential when you need to meet a specific upload limit.

Does it strip EXIF data?

Yes, SizeSnap removes EXIF metadata during compression, which also helps reduce file size.