Compress JPG Images Online
Reduce JPEG file sizes with adjustable quality. Fast, free, and private.
Drag & drop images here
or click to browse
PNG, JPG, JPEG, WebP, AVIF, HEIC, BMP, GIF
Quality
Resize
Output Format
Before / After
How JPEG Compression Works
JPEG (JPG) uses lossy compression: it analyzes the image and discards fine detail that human vision is less sensitive to, dramatically shrinking file size compared to lossless formats like PNG. This trade-off makes JPEG the default choice for photographs, social media posts, blog images, and anywhere storage or bandwidth matters.
The quality slider controls how aggressively compression runs. Higher values retain more detail at larger file sizes; lower values save more space but can introduce blockiness or color banding in gradients. For general photography shared on the web, quality between 75% and 85% looks excellent to most viewers.
How to Compress JPG Images Online
- Upload your JPG — drag and drop files into the upload area, or click to browse. You can add multiple JPEG files at once.
- Set quality — slide to 75–85% for web use, 90–95% for print. Enable target file size if you need to hit a specific limit like 100 KB or 200 KB.
- Compare results — click any thumbnail to open a side-by-side before/after view with zoom to verify quality.
- Download — save individually or download all as ZIP.
JPG vs PNG vs WebP — When to Use Each
JPG is best for photographs and images with smooth color transitions. PNG is the right choice when you need transparency or pixel-perfect graphics. WebP offers smaller files than both JPG and PNG while supporting transparency — making it ideal for modern websites focused on Core Web Vitals performance. For a fuller breakdown of trade-offs, read PNG vs JPG vs WebP.
Tips for Smaller JPG Files
- Resize before compressing — shrink dimensions first for dramatic size savings. A 4000px photo resized to 1200px can drop from 4 MB to under 200 KB.
- Strip metadata — EXIF data (camera settings, GPS coordinates) can add 50–200 KB. Our compressor removes it automatically.
- Use WebP for web — if your platform supports it, converting JPG to WebP saves an additional 25–35% with identical visual quality.
- Batch process — compress all your images at once with consistent settings using our bulk compressor.
Frequently Asked Questions
How much can I reduce a JPG file size?
Typically 60–80% smaller without noticeable quality loss. A 3 MB photo often compresses to under 500 KB at 80% quality.
Is JPEG the same as JPG?
Yes — JPG and JPEG are the same format. The shorter extension exists because early Windows only allowed 3-character file extensions.
What quality setting should I use?
For web images and social media, 75–85% is the sweet spot. For print or professional photography, use 90–95%. Below 60%, compression artifacts become noticeable.
Does JPG support transparency?
No. JPG does not support transparent backgrounds. Use PNG or WebP if you need transparency.
Are my images uploaded to a server?
No. All processing happens in your browser using HTML5 Canvas. Your photos never leave your device.
This tool works offline — install CompressEazy as an app on any device.