Skip to content

Image Compressor

Compress, resize, or convert images in your browser, with batch processing and before-and-after file sizes.

Updated

What is the Image Compressor?

Compress images in your browser by choosing an output format, adjusting quality, or reducing the image's maximum width. Add JPEG, PNG, WebP, GIF, or BMP files, process several images in a batch, and compare the output file sizes before downloading.

The image files are processed locally and are not uploaded by this tool. Results vary with the source image and settings: JPEG and WebP can reduce visual detail, while PNG uses lossless encoding. You can also keep the original format or resize to a preset width.

How it works

1. Drop your images

Drag and drop one or more image files onto the upload area, or click it to browse. JPEG, PNG, WebP, GIF, and BMP files that your browser can decode are supported. Large batches may take longer or use more memory.

2. Choose your settings

Output format controls what file type you get back. WebP delivers the best compression ratios and is supported by all modern browsers — a great default for web use. JPEG is the most compatible choice for email and older software. PNG is ideal for graphics, logos, and screenshots that need a transparent background. Keep original preserves whatever format you uploaded.

Mode changes how the browser encodes the result. PNG uses lossless encoding; JPEG and WebP are lossy formats. Resizing or converting an image can change its pixels, and JPEG or WebP may reduce detail.

Quality (lossy mode only) ranges from 10 to 100. Higher values generally preserve more detail and produce larger files. Try a few settings to find the balance that works for your image.

Resize max width optionally scales your image down to a maximum width in pixels, preserving the original aspect ratio. Useful for reducing oversized DSLR exports before adding them to a website or email.

3. Compress

Click Compress. The tool processes every image directly in your browser using the Canvas API — no file is sent to any server. A progress bar tracks each image, and results appear as they complete.

4. Download

Each image gets an individual download link showing its new size and percentage saved. Use Download all to grab every compressed file at once. If you want to try different settings, click Re-compress with new settings — your images stay loaded and reprocess immediately without re-uploading.

Examples

Compress a JPEG photo for a website

A 3.2 MB product photo is too heavy for a landing page. Drop it in, pick WebP at 80% quality, and download a 220 KB version that looks identical on screen.

product-shot.jpg — 3.2 MB, 4000×3000 px
 
product-shot.webp — 218 KB, 4000×3000 px (93% smaller)

Batch compress PNG screenshots

Drop 12 UI screenshots at once, keep PNG format with lossless mode, and download all compressed files in one click.

12 × PNG screenshots, avg 1.8 MB each
 
12 × PNG files, avg 640 KB each (65% smaller)

Resize and convert for social media

A large DSLR photo needs to be resized to 1280 px wide and converted to JPEG for email attachment.

vacation.png — 8.1 MB, 6000×4000 px
 
vacation.jpg — 310 KB, 1280×853 px (96% smaller)

Frequently asked questions

Which image formats can I use?

The tool accepts JPEG, PNG, WebP, GIF, and BMP images that your browser can decode. You can keep the original format or choose JPEG, WebP, or PNG for the output.

Does compression always make a file smaller?

No. The result depends on the image, dimensions, format, and quality setting. If the output is larger, try a different format or reduce the maximum width. The tool shows the before-and-after sizes.

What is the difference between JPEG, WebP, and PNG output?

JPEG and WebP use lossy compression, so they can reduce detail as well as file size. PNG uses lossless encoding for the image drawn to the canvas. A resize or format conversion can still change the original image.

What does the Lossless mode do?

Lossless mode asks the browser to use its default encoding quality. PNG output is lossless; JPEG and WebP remain lossy formats, even when this mode is selected. If exact pixel preservation matters, avoid resizing or converting the image.

Can I process multiple images at once?

Yes. Add several images and select Compress to process them in sequence. You can review each result, download files individually, or use Download All.

Are my images uploaded to a server?

No. Image processing happens in your browser, and the image files are not uploaded by this tool. Very large images or batches may take longer or use more memory on your device.

Can compression help a website load faster?

Smaller image files can reduce the amount of data a page needs to load. The actual effect depends on the page, the image dimensions, and how the images are delivered; compression alone does not guarantee a ranking or performance improvement.

Related tools

More utilities you might find handy.

Image

Avatar Generator - Placeholder & Initials Avatar Maker

Generate beautiful placeholder avatars with initials, gradients, pixel, identicon and geometric styles in seconds
Image

Color Picker From Image

Extract HEX, RGB, and HSL color codes from any image with pixel-perfect precision.
Image

EXIF Viewer Online

View EXIF data from any photo instantly in your browser — see camera model, shutter speed, aperture, ISO, GPS location, and date taken. 100% private, no upload.