Free Image Compressor – Compress JPEG, PNG & WebP

What Is an Image Compressor?

An image compressor reduces the file size of a JPEG, PNG, or WebP image while keeping it looking as close to the original as possible. Smaller images mean faster-loading web pages, less storage used, and quicker uploads to email, social media, or a CMS. Our free image compressor runs entirely in your browser using the HTML5 Canvas API - your files are never uploaded to a server, so it works instantly and privately, even offline once the page has loaded.

How to Use the Image Compressor

1. Add your images. Drag and drop JPEG, PNG, or WebP files onto the box, or click it to browse your device. Add as many as you like in one batch.
2. Set the quality. The slider defaults to 80, a good balance of size and visual quality. Lower it for smaller files, raise it for higher fidelity.
3. Pick an output format. Keep the original format, or convert everything to WebP (usually the smallest result) or JPEG.
4. Click Compress. Each file is processed in your browser, the thumbnail updates to show the compressed result, and you see a before/after size with the percentage saved.
5. Rename it if you want. Each finished file gets an editable name field next to its Download button, pre-filled with an automatic name - change it to whatever you like before saving.
6. Download. Save files one at a time or click "Save All" to save the whole batch.

JPEG, PNG & WebP - Which Should You Use?

JPEG compresses using adjustable lossy quality, which makes it ideal for photos - the quality slider gives you a direct, visible trade-off between file size and detail.

PNG is lossless, which is why it's the right choice for screenshots, logos, and graphics with flat colors or transparency. Because it's lossless, re-encoding a PNG alone only trims a little size - for a bigger cut, use "Convert to WebP", which applies real lossy compression while keeping transparency intact.

WebP is a modern format that typically produces 25-35% smaller files than JPEG at the same visual quality, and unlike JPEG it also supports transparency. It's supported by every modern browser, which is why it's the recommended choice when file size matters most.

Why Compress Your Images?

Page speed is a ranking factor, and large, uncompressed images are one of the most common causes of a slow website. Cutting image weight in half (or more) directly improves load time, Core Web Vitals scores like Largest Contentful Paint, and the experience for visitors on slower connections. Compressed images also mean less storage used, faster email attachments, and quicker uploads to a CMS, marketplace listing, or social post.

Who Uses This Tool?

Bloggers and content creators compress cover images and in-post photos before publishing, keeping pages fast without sacrificing visual quality.

Web developers batch-compress assets before deployment to shave load time off a site without changing a single line of code.

Online sellers shrink product photos for marketplaces and storefronts that cap upload size or that penalize slow-loading listings.

Anyone emailing or messaging photos uses it to get large phone camera photos under an attachment size limit in seconds.

Why Use Our Free Image Compressor?

No signup, no limits. Compress one image or a hundred, as many times as you want, with no account and no watermark.

Private by design. Processing happens entirely on your device using your browser's own Canvas API - your images are never uploaded, logged, or stored anywhere, which matters for client work or unpublished content.

Works everywhere. Being fully client-side, it runs on Chrome, Firefox, Edge, Safari, and Brave, on Windows, macOS, and Linux - no extension or software to install.

Real before/after numbers. Every file shows its exact size before and after, plus a running total for the whole batch, so you know exactly how much you saved.

Rename before you save. A key convenience most compressors skip: the filename is editable right next to the Download button. Leave it as the automatic "-compressed" name, or type your own - no need to rename the file afterward on your device.

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Frequently Asked Questions

Is this image compressor really free?

Yes — completely free, unlimited, no signup, and no watermark. Compress as many images and batches as you need.

Are my images uploaded to a server?

No. Compression happens entirely in your browser using the Canvas API. Your images never leave your device.

Which image formats are supported?

JPEG, PNG, and WebP. You can also convert PNG or JPEG files to WebP (or JPEG) during compression for extra savings.

Why didn't my PNG file get much smaller?

PNG output is compressed by reducing the color palette (the "PNG Colors" slider, default 256) - this shrinks screenshots, logos, and graphics a lot, since they naturally use a limited number of colors. For a photo-like PNG with thousands of colors, lowering the Colors slider will hurt quality faster - in that case, use "Convert to WebP" instead, which applies real lossy compression while keeping transparency.

Will compressing reduce image quality?

At the default quality (80) and PNG Colors (256), most people can't tell the difference from the original. Lower either slider for smaller files with more visible compression, or raise them for near-original quality.

Can I rename the file before downloading?

Yes. Once a file finishes compressing, an editable name field appears next to its Download button, pre-filled with an automatic name. Type your own name and it downloads with that name instead - leave it as-is and the automatic name is used.