Compress Image Online
Shrink photos and graphics without installing anything. Choose how much quality you want to keep, watch the file size update live, and download the result. Every byte of processing happens inside this browser tab.
Drop your image here
or
Choose ImageYou can also paste an image with Ctrl+V
Images are processed on your device and never uploaded.
• •
Runs on your device — nothing is uploaded.
Working…
0%
- Original
- Result
- Saved
- Quality
How to compress an image
- Drop an image onto the box above, or tap Choose Image.
- Pick a quality level. Very Good is a safe default for photos.
- Press Compress and compare the before/after numbers.
- Download the compressed file, or adjust the slider and try again.
You can drop up to 20 images at once and download them together as a ZIP.
Which quality level should I use?
Compression works by discarding detail your eye is least likely to notice. How much you can discard depends on the picture:
- Photographs — skin, foliage, skies and textures hide artefacts well. Quality 70–80 usually looks identical to the original at normal viewing size.
- Screenshots and text — sharp edges show JPEG ringing quickly. Stay above quality 85, or keep the file as PNG.
- Logos and flat colour — PNG or WebP will beat JPEG on both size and quality. JPEG is the wrong tool for flat graphics.
The quality badge next to the result translates the encoder setting into plain language so you do not have to think in numbers.
JPG, PNG or WebP?
The format matters more than the slider:
- JPG — best for photographs, universally supported, no transparency.
- PNG — lossless, supports transparency, large for photographs.
- WebP — roughly 25–35% smaller than JPEG at matching quality and it supports transparency. Supported by every current browser.
If the image is destined for a website, WebP is almost always the right answer. If someone will open it in an old desktop application, stay with JPG.
Do I need an exact file size?
If a form or upload limit demands a specific ceiling, use the exact-size compressor instead. You type the number you need and it searches for the highest quality that still fits underneath it.
Frequently asked questions
Are my images uploaded to your server?
No. The image is decoded, processed and re-encoded by your own browser using the Canvas and Web Worker APIs. There is no upload endpoint for this tool — open your browser's network panel while you use it and you will see no request carrying image data.
Does compressing an image reduce its dimensions?
Not with this tool. Quality-based compression keeps the pixel dimensions exactly as they were and only re-encodes the data. If you also want fewer pixels, use the resize tool or the exact-size compressor, which shrinks dimensions only when it has to.
Can I compress the same image twice?
You can, but each lossy pass throws away more detail permanently. Always compress from the original file rather than from a previously compressed copy.
Is there a file size limit?
The practical limit is your device's memory. Files up to 100 MB and images up to 100 megapixels are accepted; very large photos are processed in a background thread so the page stays responsive.
What happens to my file when I close the tab?
It is gone. The image only ever exists in your browser's memory as an object URL; closing or refreshing the page discards it. Nothing is written to our servers, and nothing is stored on your device unless you download the result.