Monu Tools

Image Compressor

Compress JPEG, PNG and WebP images to a smaller file size in your browser, with a quality you control.

How to use the Image Compressor

  1. 01

    Choose an image from your device.

  2. 02

    Set the quality and an optional maximum width or height.

  3. 03

    Compress, then download the smaller image.

What it does

Smaller image files load faster, use less bandwidth and storage, and slip under the upload limits that email, forms and content systems impose. This compressor shrinks JPEG, PNG and WebP images while letting you decide how much quality to trade for size.

How it works in your browser

You set a quality level and, optionally, a maximum width or height. The tool re-encodes the image at that quality and resizes it if needed, then shows the before and after file sizes so you can see exactly how much you saved.

There are two ways it reduces size, and they stack. Re-encoding at a lower quality discards detail the eye barely notices (this is lossy, as used by JPEG and WebP), while resizing removes pixels outright. For a photo headed to the web, dropping to around 70 to 80 percent quality is often visually indistinguishable from the original.

Choosing a format

Format matters. WebP typically produces noticeably smaller files than JPEG at the same visible quality, JPEG is the safe universal choice for photographs, and PNG is best for graphics, screenshots and anything needing sharp edges or transparency, though it compresses photos less efficiently.

What compresses best

Photographs shrink the most because their smooth gradients tolerate compression well; flat graphics and text are already small and gain less. If a result looks soft, nudge the quality back up; the savings curve flattens quickly past a certain point.

Private by design

Crucially, the whole process runs in your browser. Your images are never uploaded, which makes this safe for private photos, ID scans or anything confidential, and means there is no waiting on a server.

Frequently asked questions

Is my image uploaded to a server?

No. Compression runs entirely in your browser, so your image never leaves your device, which is ideal for private photos.

How does the compression work?

It re-encodes the image at a lower quality and, optionally, resizes it so the longest side fits the limit you set. Both reduce file size, and they can be combined.

Which formats are supported?

Common web image formats such as JPEG, PNG and WebP. Photographs usually shrink the most, since they compress well at slightly lower quality.

What is the difference between lossy and lossless compression?

Lossy compression (JPEG, WebP) discards some detail to save more space, which is fine for photos. Lossless keeps every pixel but saves less. Resizing reduces size either way by removing pixels.

What quality setting should I use?

For web photos, around 70 to 80 percent is usually indistinguishable from the original while cutting the file size significantly. Raise it if you notice softness, lower it if you need a smaller file.

Will compressing reduce quality?

Lossy compression removes some detail, but at sensible settings the difference is hard to see. You control the trade-off, and the before and after preview lets you judge it.

Embed this tool

Add this tool to your own website. Copy the snippet below; it stays up to date automatically.

<iframe src="https://monu.tools/embed/en/image-compressor" width="100%" height="640" style="border:1px solid #e5e5e5;border-radius:12px;max-width:680px" loading="lazy" title="Monu Tools"></iframe>

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