Image Compressor — JPEG Output from JPEG or PNG
Upload a JPEG or PNG, set the quality, and download a re-encoded JPEG with a side-by-side preview and live size stats. Free, no signup, runs in your browser.
Upload Image
Click to upload or drag & drop
Input: JPEG or PNG · Output: JPEG (lossy; no transparency)
Original
0 KBCompressed
0 KBSaves as a JPEG to your device.
What the Image Compressor Does
The Image Compressor reduces an image's file size so it loads faster and takes up less space. Upload a JPEG or PNG, drag the quality slider, and watch the compressed preview and size stats update live. When you're happy with the trade-off between size and quality, download the result.
It compresses by re-encoding the image as a JPEG at the quality you choose — that's what makes JPEG photos shrink so much with little visible change. Everything runs in your browser, so your image is never uploaded to a server and stays completely private.
Two things worth knowing: the output is always a JPEG, and JPEG doesn't support transparency. So if you compress a PNG with a transparent background, the transparent areas will become solid (usually black) and the file is saved as a .jpg. For photos that's exactly what you want; for logos or icons that need transparency, keep the original PNG instead.
Why Compressing Images Matters
Images are usually the heaviest part of a web page, so oversized files are a leading cause of slow loading. Smaller images improve load time, which helps Core Web Vitals (especially LCP) and, in turn, search rankings — Google treats page speed as a ranking signal. Faster pages also keep visitors from bouncing, and lighter files cut storage and bandwidth costs. Compressing before emailing or uploading keeps you under attachment limits without letting an app re-compress and degrade your photo for you.
Step-by-Step
Upload an image
Click or drag in a JPEG or PNG. The original preview and size appear right away.
Set the quality
Start around 80% and inspect the preview for quality loss; the result may be larger than the input. Lower it for smaller files.
Compare and check the stats
The side-by-side preview and the reduction percentage update as you adjust.
Download
Click Download and the compressed JPEG saves straight to your device.
Tips for Quality Without the Bloat
Start at 80%. This may reduce photo size with limited visible change, but JPEG encoding is lossy even at the highest setting. Drop to 60–70% only if you need the smallest possible file for the web. Always start from the highest-quality original — re-compressing an already-compressed image stacks up visible artifacts. Check the preview and zoom into detailed areas before downloading. And since the output is JPEG, keep the original PNG for anything that needs a transparent background.
Features
Quality Slider
Fine-tune compression and see the effect instantly.
Side-by-Side Preview
Compare original and compressed before you commit.
Live Stats
Original size, compressed size, and percent saved.
One-Click Download
Save the optimized JPEG straight to your device.
100% Private
Compression runs in your browser — nothing is uploaded.
Free & Unlimited
No signup, no watermark, no usage limits.