How to Compress an Image (Free, No Sign-Up)

You have a photo that's too heavy to email, a screenshot that won't fit through a web form, or a folder of camera shots bloating your site. You don't need Photoshop or a desktop app for that. The MyTools Image Compressor shrinks JPEG, PNG, WebP, and GIF files by up to 90% — right in your browser, in under a minute, without creating an account. Here's how to compress an image step by step.

What You'll Need

• A modern browser (Chrome, Firefox, Safari, Edge — desktop or mobile)
• One or more image files in JPEG, PNG, WebP, or GIF format
• That's it — nothing gets uploaded. Compression runs locally in your browser.

How to Compress an Image — Step by Step

Step 1: Open the tool

Go to MyTools — Image Compressor in your browser. No account, no installation, nothing to download.

The landing page with the drag-and-drop upload zone.

Step 2: Add your images

Drag and drop your files onto the upload zone, or click Browse files to pick them. You can add a single image or dozens at once — each file will be processed independently.

Step 3: Choose a compression mode

Pick Light, Balanced, Strong, or Custom. Balanced is the default and shrinks most photos by 70–90% with no visible quality loss. Custom lets you set the exact JPEG quality from 1 to 100.

You can also:

• Change output format — keep the original, or convert to JPEG, WebP, or PNG. WebP typically saves another 20–30% over JPEG.
• Limit max dimension — cap the longest side at 1920 px (or any value) to shrink oversized photos.
• Strip metadata (EXIF) — remove location and camera data. On by default.

The configure step with thumbnails on the left and settings on the right.

Step 4: Compress and download

Click Compress and the tool processes everything locally. When it's done, you'll see how much space you saved. Click Download to save the compressed file (or grab the whole batch as a ZIP).

The result step shows the size saved and lets you download the compressed image.

Tips & Troubleshooting

The output is bigger than the original. This sometimes happens with already-compressed JPEGs or small PNGs. The tool detects this and automatically returns the original file unchanged — so you never end up with a worse version.

My PNG only shrunk a little. PNGs are lossless and harder to compress than photos. For a much smaller file, switch the Output format to JPEG or WebP. WebP is the best modern option and is supported by every recent browser.

I want to resize, not just compress. Use the Limit max dimension option to cap the longest side. If you need precise dimensions or to crop to a specific aspect ratio, our image resizer and image cropper are better suited.

Wrap-Up

Compressing an image is the simplest fix for "this file is too big" — and it doesn't need a desktop app. With the right settings, you can drop a photo from 4 MB to 400 KB in a couple of seconds, with no visible quality loss and nothing leaving your computer.

Ready to shrink your images? Try the Image Compressor for free →