Image Compressor.
Compress JPG, PNG, WebP, and GIF images instantly — no upload, no server, entirely in your browser.
Drop images here or click to upload
JPG, PNG, WebP, GIF — up to 5 images at once
Upload images above to get started. No files leave your device.
How image compression works.
This tool uses the browser's built-in Canvas API to redraw each image onto an off-screen canvas and then export it at the quality level you specify via canvas.toBlob(). Lossy formats like JPEG and WebP discard imperceptible detail to achieve dramatic file size reductions — often 60–85% smaller — while PNG uses lossless compression that preserves every pixel.
Because all processing runs client-side in your browser's JavaScript engine, your images are never transmitted to any external server. This makes the tool safe for confidential, personal, or proprietary images. There are no file-size caps, no sign-up requirements, and no watermarks.
Capabilities
What You Get
Canvas-based compression that never uploads a byte — safe for confidential, personal, and client work.
60–85% Smaller
Lossy re-encoding strips imperceptible detail while keeping images visually intact.
Quality Control
Set the exact quality level and see the resulting file size before you download.
Batch Friendly
Drop in multiple images and compress them in one pass.
Format Support
Handles JPG, PNG, WebP, and GIF using the browser's native encoders.
No Watermarks
No caps on file size, no sign-up wall, and nothing stamped onto your output.
Never Uploaded
Everything runs on-device, so proprietary and personal images stay private.
Related tools.
More free browser-based utilities, connected by category and use case.
Image Resizer
Upload an image, set a target width and/or height, maintain aspect ratio optionally, and download the resized version. Supports JPG, PNG, and WebP output.
Color Picker & Palette
Full-featured color picker with HEX, RGB, HSL, and CMYK output. Upload an image to extract the 5 dominant colors as a palette. Copy any value with one click.
Meme Generator
Choose from popular meme templates or upload your own image. Add top and bottom text with font size and color controls. Download as PNG. Simple and fast.
FAQ
Image Compressor FAQ.
Does this tool upload my images to a server?
No. All compression happens entirely inside your browser using the Canvas API. Your images are never sent to any server, making this tool completely private and safe for sensitive or personal photos.
What image formats are supported?
You can upload JPG, PNG, WebP, and GIF images. You can also choose the output format — JPEG, PNG, or WebP — independently of the input. Converting a PNG to JPEG, for example, often gives the most dramatic file size reduction.
What does the quality slider do?
The quality slider (1–100) controls the lossy compression level applied by the Canvas API's toBlob method. A quality of 80 is generally a sweet spot — visually nearly identical to the original while reducing file size by 60–85% for JPEG output. PNG uses lossless compression so the slider has less effect on PNG output.
Why is WebP often the best output format for the web?
WebP is a modern image format developed by Google that achieves 25–35% smaller file sizes compared to JPEG at equivalent visual quality, and supports transparency like PNG. It is supported by all modern browsers and is the recommended format for web images when file size matters.
How does image compression affect web performance?
Images are typically the largest assets on a webpage. Reducing image sizes directly improves page load time, Core Web Vitals scores (especially Largest Contentful Paint), and bandwidth usage — which is especially impactful for users on mobile networks.
Can I compress multiple images at once?
Yes. You can upload up to 5 images at a time. The 'Compress All' button processes them sequentially in your browser. The 'Download All' button then triggers individual downloads for each compressed file.
