Compress & convert.
Keep the detail.

Free Online Image Compressor and Converter

Free online image compressor and converter that lets you compress JPG, PNG, and WebP images directly in your browser. Reduce image file size quickly while maintaining good visual quality—without installing software or creating an account.

Its only job is simple: reduce the file size of your photos while keeping them sharp enough to use anywhere — from a website gallery to a WhatsApp chat to a client email.

Why Use an Image Compressor Before Uploading

Large, uncompressed photos slow down every page they touch. Compressing an image re-encodes the picture so it takes up far less space on disk, without changing what it actually shows.

Website owners run every photo through a compressor before publishing. Page speed directly affects Google’s Core Web Vitals score, and a faster site tends to rank and convert better.

Freelancers and students use it to fit strict upload limits on job portals, college forms, and email attachments. Anyone sending photos over a slow connection reaches for a quick compression tool simply to save time and mobile data.

How This Image Compressor Works

Most tools that call themselves an image compressor upload your photo to a remote server, compress it there, and send it back. That means your files leave your device and you wait on a queue.

This one is different. It uses your browser’s own Canvas API to do the compression locally, so nothing is ever transmitted anywhere.

Drop a photo onto the circular upload area, and it gets to work instantly. Drag the quality slider to control how aggressively the file is squeezed — lower values produce a smaller size, higher values keep more visual detail.

Because everything runs client-side, it can process a whole batch of photos in seconds, even on an average laptop.

Compress and Convert in One Step

Beyond compression, this image compressor doubles as an image format converter.

Use the Format dropdown to convert a PNG into a JPG, a JPG into WebP, or let “Auto” decide the smartest output for you. It automatically flattens transparent PNGs onto a clean white background when converting to JPG, so you never end up with a black box where transparency used to be.

This makes it a genuine two-in-one compressor and converter — useful whether you need a smaller file, a different format, or both at once.

Supported Formats

This image compressor supports three widely used formats:

• JPG / JPEG — best for photos; you get full control over the quality-to-size ratio.
• PNG — best for graphics and transparency; the alpha channel is preserved automatically when needed.
• WebP — a modern format that can shrink file size further at similar visual quality.

Is This Image Compressor Really Free?

Yes. There’s no sign-up, no watermark, and no daily limit on how many times you can use it.

Because the compression happens in your own browser rather than on a paid server, there’s no per-image cost to cover. That’s exactly why this tool can stay free for unlimited use.

Tips for Getting the Best Result from This Image Compressor

• Start around 70% quality — most photos still look sharp at that setting while the file size drops significantly.
• For screenshots, logos, or graphics with flat colors, let the tool choose “Auto” format so it can decide between JPG and PNG based on transparency.
• If a file is going straight to a website, compress it once more at a slightly lower quality — most visitors won’t notice the difference, but the page will load faster.
• Compress in batches: up to 20 files at once, so there’s no need to process photos one at a time.   

Frequently Asked Questions

What is an image compressor?

An image compressor reduces the file size of an image while attempting to maintain good visual quality. Smaller image files are easier to upload, share, store, and use on websites.

Can I compress JPG, PNG, and WebP images?

Yes. MintifyTools supports JPG/JPEG, PNG, and WebP image formats.

Is this image compressor free?

Yes. MintifyTools Image Compressor is free to use, with no account required and no watermark added to your compressed images.

Are my images uploaded to a server?

No. Compression is performed locally in your browser using the Canvas API, so the images do not need to be uploaded to a remote compression server.

Can I compress multiple images at once?

Yes. You can process multiple images in a batch, with up to 20 files at once according to the current tool functionality.

Can I compress an image to 100KB?

You can reduce an image’s file size by adjusting the compression settings. The final size depends on the original image, dimensions, format, and compression level.