An image compressor reduces the file size of your photos and graphics without noticeably degrading visual quality. Smaller images load faster on websites, take up less storage space, and are easier to share via email or messaging apps. This tool compresses JPEG, PNG, and WebP images entirely in your browser using the Canvas API, so your files are never uploaded to any server.
Upload Images
Drag & drop images here, or click to browse
Supports JPEG, PNG, WebP
PNG is lossless — quality slider does not apply. Use JPEG or WebP for smaller files, or resize dimensions to reduce PNG size.
How to Compress Images Online
Large image files are one of the biggest culprits behind slow-loading websites and bloated email attachments. An image compressor solves this by reducing file sizes while preserving the visual quality that matters to viewers. Whether you are optimizing product photos for an online store, shrinking screenshots for a blog post, or preparing vacation pictures for email, compression makes your images faster to load and easier to share.
Step 1: Upload Your Images
Drag and drop one or more images onto the upload area, or click to open your file browser. The tool accepts JPEG, PNG, and WebP formats. You can upload multiple images at once for batch processing, which is especially useful when preparing assets for a website or social media campaign.
Step 2: Adjust Compression Settings
Use the quality slider to control the compression level. The default value of 80% works well for most photographs, offering a significant file size reduction with minimal visible quality loss. For images where small file size is more important than perfection, try 60-70%. For archival or print-quality needs, keep it at 90-100%. You can also choose the output format: JPEG is best for photographs, PNG preserves transparency, and WebP offers the best compression ratio for web use.
Step 3: Optionally Resize
If your images are larger than needed, enter a maximum width or height in the resize field. The tool scales images proportionally so they fit within your specified dimension without distortion. This is particularly helpful for web images, where a 4000-pixel-wide photo is often unnecessary and a 1200-pixel version loads much faster.
Step 4: Compress and Compare
Click the Compress button to process your images. For each image, you will see a side-by-side preview comparing the original and compressed versions, along with the file sizes and compression ratio. This lets you judge the visual quality before deciding to download. If the result is too aggressive, adjust the quality slider and compress again.
Step 5: Download Your Compressed Images
Once you are satisfied with the results, click the download button on each image to save the compressed version to your device. Because all processing happens locally in your browser using the Canvas API, your original images are never uploaded to any server. This makes the tool completely private, fast, and safe to use with sensitive photos or proprietary graphics.
Frequently Asked Questions
Is this image compressor really free?
Yes, this image compressor is completely free with no limits. There are no watermarks, no file size caps, and no signup required. You can compress as many images as you want, in any supported format, at any quality level. Every feature is available at no cost.
Is my image data safe and private?
Absolutely. All compression happens entirely in your browser using the HTML5 Canvas API. Your images are never uploaded to any server, never stored in any database, and never seen by anyone but you. Once you close the page, the images are gone from memory completely.
What image formats are supported?
This tool supports JPEG, PNG, and WebP formats for both input and output. You can upload an image in any of these formats and choose a different output format if you want to convert between them. For example, you can upload a PNG and compress it as a WebP file for even smaller sizes.
How does the quality slider work?
The quality slider controls the compression level from 10% to 100%. Lower values produce smaller files but with more visible compression artifacts, while higher values preserve more detail at the cost of larger file sizes. For most photos, 70-80% quality provides an excellent balance between file size and visual quality.
Can I compress multiple images at once?
Yes. You can drag and drop or select multiple images at once using the file picker. Each image is compressed individually with your chosen settings, and you can download them one by one. This makes it easy to process a batch of photos for a website, email, or social media post.
Will compressing an image reduce its quality?
Some quality loss is inherent in lossy compression formats like JPEG and WebP, but at 70-80% quality the difference is usually imperceptible to the human eye. PNG compression is lossless, meaning no quality is lost. The side-by-side preview lets you compare the original and compressed images to judge the result before downloading.
Can I resize images while compressing them?
Yes. You can set a maximum width or height in pixels, and the tool will scale the image down proportionally before compressing. This is useful for preparing images for websites or social media where specific dimensions are required. If the image is already smaller than your specified dimensions, it will not be enlarged.