Compress images before uploading — right in your browser
Shrink photos and screenshots to fit upload limits without installing anything. A fast, private workflow that never sends your files to a server.
Why compress before you upload?
Big images are the number one reason uploads fail and pages load slowly. A photo straight from your phone can weigh 3–5 MB, while most forms, portals, and chats work best with files under 1 MB. Compressing first means faster uploads, fewer rejections, and happier visitors if the image ends up on a website.
The usual advice is to install software or use an online compressor that copies your images to someone else's server. This workflow skips both: the compression runs locally in your browser, and your originals never leave your device.
The workflow, step by step
- 1
Open the Image Compressor and drag in the images you want to shrink.
- 2
Choose the quality level and, if needed, a smaller output format like WebP.
- 3
Compare the compressed file size with the original and adjust if needed.
- 4
Download the compressed copies and upload them wherever the originals were too big.
Ready to shrink your images?
Open the compressor, drop your files, and download smaller versions in seconds. Free, no signup, and nothing is uploaded.
Open Image CompressorFrequently asked questions
How do I compress an image before uploading it?
Open the Image Compressor, drop your JPG, PNG, or WebP files, and pick a quality level. The tool shows the new file size next to the original — download the compressed copy and upload that instead. Everything runs on your device, so the images are never uploaded to a server first.
How small should my images be for a web upload?
Most websites accept images up to 1–2 MB comfortably, and forms often cap uploads at 2–10 MB per file. For faster page loads, aim for photos under 300 KB and screenshots under 150 KB. If the size is still too big, resize the dimensions before compressing.
Does compressing an image reduce quality?
Lossy formats (JPEG, WebP) trade a small amount of quality for a much smaller file. At moderate quality levels the difference is hard to see. The compressor lets you pick the quality, so you can balance file size against how the image looks.
Are my images uploaded to a server?
No. Compression uses browser-native canvas APIs, so your photos and screenshots never leave your device. That makes the workflow safe for personal photos and work documents alike.